Merge ~athos-ribeiro/ubuntu-docker-images/+git/cortex:1.11-22.04 into ~ubuntu-docker-images/ubuntu-docker-images/+git/cortex:1.10-21.10

[Athos Ribeiro]

This is a proposal for the new 22.04 cortex OCI branch.

As usual, the proposal will not be merged into the target for this MP. Instead, a new 1.11-22.04 branch will be created in the repository.

This MP includes:

- A merge for the upstream v.1.11 tag to pull in the latest stable release;
- an update to the Dockerfile for the 22.04 release; and
- a proposal to maintain the image's cortex configuration file in the oci directory. The upstream configuration file have been changing when we need new versions of this image and, like now, the changes may not be fit for testing our images.

[Sergio Durigan Junior (sergiodj)]

Thanks, Athos.

Built & tested fine locally. LGTM. I also like the idea of maintining our own, simplified version of the configuration file.

review: Approve

[Athos Ribeiro (athos-ribeiro)]

Thanks, Sergio!

Merged :)

diff --git a/.errcheck-exclude b/.errcheck-exclude
index cdf86dc..b8e1dc9 100644
--- a/.errcheck-exclude
+++ b/.errcheck-exclude
@@ -1,6 +1,6 @@
 io/ioutil.WriteFile
 io/ioutil.ReadFile
-(github.com/go-kit/kit/log.Logger).Log
+(github.com/go-kit/log.Logger).Log
 io.Copy
 (github.com/opentracing/opentracing-go.Tracer).Inject
 (*github.com/cortexproject/cortex/pkg/util/spanlogger.SpanLogger).Error
diff --git a/.github/workflows/test-build-deploy.yml b/.github/workflows/test-build-deploy.yml
index db10325..d356243 100644
--- a/.github/workflows/test-build-deploy.yml
+++ b/.github/workflows/test-build-deploy.yml
@@ -10,7 +10,7 @@ jobs:
   lint:
     runs-on: ubuntu-20.04
     container:
-      image: quay.io/cortexproject/build-image:build-image-multiarch-1d2497ff6
+      image: quay.io/cortexproject/build-image:release-1.11-go-1-16-15-ebfea1212
     steps:
       - name: Checkout Repo
         uses: actions/checkout@v2
@@ -34,7 +34,7 @@ jobs:
   test:
     runs-on: ubuntu-20.04
     container:
-      image: quay.io/cortexproject/build-image:build-image-multiarch-1d2497ff6
+      image: quay.io/cortexproject/build-image:release-1.11-go-1-16-15-ebfea1212
     services:
       cassandra:
         image: cassandra:3.11
@@ -55,7 +55,7 @@ jobs:
   build:
     runs-on: ubuntu-20.04
     container:
-      image: quay.io/cortexproject/build-image:build-image-multiarch-1d2497ff6
+      image: quay.io/cortexproject/build-image:release-1.11-go-1-16-15-ebfea1212
     steps:
       - name: Checkout Repo
         uses: actions/checkout@v2
@@ -98,8 +98,8 @@ jobs:
       - name: Upgrade golang
         run: |
           cd /tmp
-          wget https://dl.google.com/go/go1.16.3.linux-amd64.tar.gz
-          tar -zxvf go1.16.3.linux-amd64.tar.gz
+          wget https://dl.google.com/go/go1.16.15.linux-amd64.tar.gz
+          tar -zxvf go1.16.15.linux-amd64.tar.gz
           sudo rm -fr /usr/local/go
           sudo mv /tmp/go /usr/local/go
           cd -
@@ -140,6 +140,7 @@ jobs:
           docker pull quay.io/cortexproject/cortex:v1.7.0
           docker pull quay.io/cortexproject/cortex:v1.8.0
           docker pull quay.io/cortexproject/cortex:v1.9.0
+          docker pull quay.io/cortexproject/cortex:v1.10.0
           docker pull shopify/bigtable-emulator:0.1.0
           docker pull rinscy/cassandra:3.11.0
           docker pull memcached:1.6.1
@@ -174,14 +175,14 @@ jobs:
         run: |
           touch build-image/.uptodate
           MIGRATIONS_DIR=$(pwd)/cmd/cortex/migrations
-          make BUILD_IMAGE=quay.io/cortexproject/build-image:build-image-multiarch-1d2497ff6 TTY='' configs-integration-test
+          make BUILD_IMAGE=quay.io/cortexproject/build-image:release-1.11-go-1-16-15-ebfea1212 TTY='' configs-integration-test
 
   deploy_website:
     needs: [build, test]
     if: (github.ref == 'refs/heads/master' || startsWith(github.ref, 'refs/tags/')) && github.repository == 'cortexproject/cortex'
     runs-on: ubuntu-20.04
     container:
-      image: quay.io/cortexproject/build-image:build-image-multiarch-1d2497ff6
+      image: quay.io/cortexproject/build-image:release-1.11-go-1-16-15-ebfea1212
     steps:
       - name: Checkout Repo
         uses: actions/checkout@v2
@@ -218,7 +219,7 @@ jobs:
     if: (github.ref == 'refs/heads/master' || startsWith(github.ref, 'refs/tags/')) && github.repository == 'cortexproject/cortex'
     runs-on: ubuntu-20.04
     container:
-      image: quay.io/cortexproject/build-image:build-image-multiarch-1d2497ff6
+      image: quay.io/cortexproject/build-image:release-1.11-go-1-16-15-ebfea1212
     steps:
       - name: Checkout Repo
         uses: actions/checkout@v2
diff --git a/.golangci.yml b/.golangci.yml
index 17a354d..38334b9 100644
--- a/.golangci.yml
+++ b/.golangci.yml
@@ -7,6 +7,7 @@ linters:
     - golint
     - gofmt
     - misspell
+    - depguard
 
 linters-settings:
   errcheck:
@@ -16,6 +17,12 @@ linters-settings:
   goimports:
     local-prefixes: "github.com/cortexproject/cortex"
 
+  depguard:
+    list-type: blacklist
+    include-go-root: true
+    packages-with-error-message:
+      - github.com/go-kit/kit/log: "Use github.com/go-kit/log instead of github.com/go-kit/kit/log"
+
 run:
   timeout: 5m
 
diff --git a/CHANGELOG.md b/CHANGELOG.md
index a0ec492..00f5fe8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,70 @@
 
 ## master / unreleased
 
+
+## 1.11.1 2022-03-08
+* [ENHANCEMENT] Build with Go 1.16.15 to address CVE-2022-24921 "stack exhaustion via a deeply nested expression" #4663
+
+## 1.11.0 2021-11-25
+* [BUGFIX] Update go-kit package to fix spurious log messages #4544
+* [CHANGE] Memberlist: Expose default configuration values to the command line options. Note that setting these explicitly to zero will no longer cause the default to be used. If the default is desired, then do set the option. The following are affected: #4276
+  - `-memberlist.stream-timeout`
+  - `-memberlist.retransmit-factor`
+  - `-memberlist.pull-push-interval`
+  - `-memberlist.gossip-interval`
+  - `-memberlist.gossip-nodes`
+  - `-memberlist.gossip-to-dead-nodes-time`
+  - `-memberlist.dead-node-reclaim-time`
+* [CHANGE] `-querier.max-fetched-chunks-per-query` previously applied to chunks from ingesters and store separately; now the two combined should not exceed the limit. #4260
+* [CHANGE] Memberlist: the metric `memberlist_kv_store_value_bytes` has been removed due to values no longer being stored in-memory as encoded bytes. #4345
+* [CHANGE] Some files and directories created by Cortex components on local disk now have stricter permissions, and are only readable by owner, but not group or others. #4394
+* [CHANGE] The metric `cortex_deprecated_flags_inuse_total` has been renamed to `deprecated_flags_inuse_total` as part of using grafana/dskit functionality. #4443
+* [FEATURE] Ruler: Add new `-ruler.query-stats-enabled` which when enabled will report the `cortex_ruler_query_seconds_total` as a per-user metric that tracks the sum of the wall time of executing queries in the ruler in seconds. #4317
+* [FEATURE] Query Frontend: Add `cortex_query_fetched_series_total` and `cortex_query_fetched_chunks_bytes_total` per-user counters to expose the number of series and bytes fetched as part of queries. These metrics can be enabled with the `-frontend.query-stats-enabled` flag (or its respective YAML config option `query_stats_enabled`). #4343
+* [FEATURE] AlertManager: Add support for SNS Receiver. #4382
+* [FEATURE] Distributor: Add label `status` to metric `cortex_distributor_ingester_append_failures_total` #4442
+* [FEATURE] Queries: Added `present_over_time` PromQL function, also some TSDB optimisations. #4505
+* [ENHANCEMENT] Add timeout for waiting on compactor to become ACTIVE in the ring. #4262
+* [ENHANCEMENT] Reduce memory used by streaming queries, particularly in ruler. #4341
+* [ENHANCEMENT] Ring: allow experimental configuration of disabling of heartbeat timeouts by setting the relevant configuration value to zero. Applies to the following: #4342
+  * `-distributor.ring.heartbeat-timeout`
+  * `-ring.heartbeat-timeout`
+  * `-ruler.ring.heartbeat-timeout`
+  * `-alertmanager.sharding-ring.heartbeat-timeout`
+  * `-compactor.ring.heartbeat-timeout`
+  * `-store-gateway.sharding-ring.heartbeat-timeout`
+* [ENHANCEMENT] Ring: allow heartbeats to be explicitly disabled by setting the interval to zero. This is considered experimental. This applies to the following configuration options: #4344
+  * `-distributor.ring.heartbeat-period`
+  * `-ingester.heartbeat-period`
+  * `-ruler.ring.heartbeat-period`
+  * `-alertmanager.sharding-ring.heartbeat-period`
+  * `-compactor.ring.heartbeat-period`
+  * `-store-gateway.sharding-ring.heartbeat-period`
+* [ENHANCEMENT] Memberlist: optimized receive path for processing ring state updates, to help reduce CPU utilization in large clusters. #4345
+* [ENHANCEMENT] Memberlist: expose configuration of memberlist packet compression via `-memberlist.compression=enabled`. #4346
+* [ENHANCEMENT] Update Go version to 1.16.6. #4362
+* [ENHANCEMENT] Updated Prometheus to include changes from prometheus/prometheus#9083. Now whenever `/labels` API calls include matchers, blocks store is queried for `LabelNames` with matchers instead of `Series` calls which was inefficient. #4380
+* [ENHANCEMENT] Querier: performance improvements in socket and memory handling. #4429 #4377
+* [ENHANCEMENT] Exemplars are now emitted for all gRPC calls and many operations tracked by histograms. #4462
+* [ENHANCEMENT] New options `-server.http-listen-network` and `-server.grpc-listen-network` allow binding as 'tcp4' or 'tcp6'. #4462
+* [ENHANCEMENT] Rulers: Using shuffle sharding subring on GetRules API. #4466
+* [ENHANCEMENT] Support memcached auto-discovery via `auto-discovery` flag, introduced by thanos in https://github.com/thanos-io/thanos/pull/4487. Both AWS and Google Cloud memcached service support auto-discovery, which returns a list of nodes of the memcached cluster. #4412
+* [BUGFIX] Fixes a panic in the query-tee when comparing result. #4465
+* [BUGFIX] Frontend: Fixes @ modifier functions (start/end) when splitting queries by time. #4464
+* [BUGFIX] Compactor: compactor will no longer try to compact blocks that are already marked for deletion. Previously compactor would consider blocks marked for deletion within `-compactor.deletion-delay / 2` period as eligible for compaction. #4328
+* [BUGFIX] HA Tracker: when cleaning up obsolete elected replicas from KV store, tracker didn't update number of cluster per user correctly. #4336
+* [BUGFIX] Ruler: fixed counting of PromQL evaluation errors as user-errors when updating `cortex_ruler_queries_failed_total`. #4335
+* [BUGFIX] Ingester: When using block storage, prevent any reads or writes while the ingester is stopping. This will prevent accessing TSDB blocks once they have been already closed. #4304
+* [BUGFIX] Ingester: fixed ingester stuck on start up (LEAVING ring state) when `-ingester.heartbeat-period=0` and `-ingester.unregister-on-shutdown=false`. #4366
+* [BUGFIX] Ingester: panic during shutdown while fetching batches from cache. #4397
+* [BUGFIX] Querier: After query-frontend restart, querier may have lower than configured concurrency. #4417
+* [BUGFIX] Memberlist: forward only changes, not entire original message. #4419
+* [BUGFIX] Memberlist: don't accept old tombstones as incoming change, and don't forward such messages to other gossip members. #4420
+* [BUGFIX] Querier: fixed panic when querying exemplars and using `-distributor.shard-by-all-labels=false`. #4473
+* [BUGFIX] Querier: honor querier minT,maxT if `nil` SelectHints are passed to Select(). #4413
+* [BUGFIX] Compactor: fixed panic while collecting Prometheus metrics. #4483
+
+
 ## 1.10.0 / 2021-08-03
 
 * [CHANGE] Prevent path traversal attack from users able to control the HTTP header `X-Scope-OrgID`. #4375 (CVE-2021-36157)
diff --git a/MAINTAINERS b/MAINTAINERS
index f482974..f9df6c1 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1,3 +1,4 @@
+Alvin Lin, Amazon Web Services <[e-mail]> (@alvinlin123)
 Bryan Boreham <[e-mail]> (@bboreham)
 Goutham Veeramachaneni, Grafana Labs <[e-mail]> (@gouthamve)
 Jacob Lisi, Grafana Labs <[e-mail]> (@jtlisi)
diff --git a/Makefile b/Makefile
index c3dc9aa..99187f8 100644
--- a/Makefile
+++ b/Makefile
@@ -119,7 +119,7 @@ build-image/$(UPTODATE): build-image/*
 SUDO := $(shell docker info >/dev/null 2>&1 || echo "sudo -E")
 BUILD_IN_CONTAINER := true
 BUILD_IMAGE ?= $(IMAGE_PREFIX)build-image
-LATEST_BUILD_IMAGE_TAG ?= build-image-multiarch-1d2497ff6
+LATEST_BUILD_IMAGE_TAG ?= release-1.11-go-1-16-15-ebfea1212
 
 # TTY is parameterized to allow Google Cloud Builder to run builds,
 # as it currently disallows TTY devices. This value needs to be overridden
diff --git a/README.md b/README.md
index 151a821..53e4663 100644
--- a/README.md
+++ b/README.md
@@ -132,7 +132,7 @@ For security issues see https://github.com/cortexproject/cortex/security/policy
 
 ## Community Meetings
 
-The Cortex community call happens every three weeks on Thursday at 03:30pm – 04:15pm UTC to get calendar invite join the [google groups](https://groups.google.com/forum/#!forum/cortex-monitoring).
+The Cortex community call happens every two weeks on Thursday, alternating at 1200 UTC and 1700 UTC. To get a calendar invite join the [google groups](https://groups.google.com/forum/#!forum/cortex-monitoring) or check out [the CNCF community calendar](https://www.cncf.io/calendar/).
 
 Meeting notes are held [here](https://docs.google.com/document/d/1shtXSAqp3t7fiC-9uZcKkq3mgwsItAJlH6YW6x1joZo/edit).
 
diff --git a/VERSION b/VERSION
index ed21137..720c738 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.10.0
 \ No newline at end of file
+1.11.1
diff --git a/build-image/Dockerfile b/build-image/Dockerfile
index 263996f..9077fcb 100644
--- a/build-image/Dockerfile
+++ b/build-image/Dockerfile
@@ -1,4 +1,4 @@
-FROM golang:1.16.3-buster
+FROM golang:1.16.15-buster
 ARG goproxyValue
 ENV GOPROXY=${goproxyValue}
 RUN apt-get update && apt-get install -y curl python-requests python-yaml file jq unzip protobuf-compiler libprotobuf-dev && \
diff --git a/cmd/blocksconvert/main.go b/cmd/blocksconvert/main.go
index fb5e1f3..c10180e 100644
--- a/cmd/blocksconvert/main.go
+++ b/cmd/blocksconvert/main.go
@@ -7,14 +7,14 @@ import (
 	"os"
 	"strings"
 
-	"github.com/go-kit/kit/log/level"
+	"github.com/go-kit/log/level"
+	"github.com/grafana/dskit/services"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/weaveworks/common/server"
 	"github.com/weaveworks/common/signals"
 
 	"github.com/cortexproject/cortex/pkg/cortex"
 	util_log "github.com/cortexproject/cortex/pkg/util/log"
-	"github.com/cortexproject/cortex/pkg/util/services"
 	"github.com/cortexproject/cortex/tools/blocksconvert"
 	"github.com/cortexproject/cortex/tools/blocksconvert/builder"
 	"github.com/cortexproject/cortex/tools/blocksconvert/cleaner"
diff --git a/cmd/cortex/main.go b/cmd/cortex/main.go
index b67b96a..15ec60f 100644
--- a/cmd/cortex/main.go
+++ b/cmd/cortex/main.go
@@ -12,7 +12,8 @@ import (
 	"strings"
 	"time"
 
-	"github.com/go-kit/kit/log/level"
+	"github.com/go-kit/log/level"
+	"github.com/grafana/dskit/flagext"
 	"github.com/pkg/errors"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/common/version"
@@ -21,7 +22,6 @@ import (
 
 	"github.com/cortexproject/cortex/pkg/cortex"
 	"github.com/cortexproject/cortex/pkg/util"
-	"github.com/cortexproject/cortex/pkg/util/flagext"
 	util_log "github.com/cortexproject/cortex/pkg/util/log"
 )
 
diff --git a/cmd/query-tee/main.go b/cmd/query-tee/main.go
index 87bd657..6d6b083 100644
--- a/cmd/query-tee/main.go
+++ b/cmd/query-tee/main.go
@@ -4,8 +4,9 @@ import (
 	"flag"
 	"os"
 
-	"github.com/go-kit/kit/log/level"
+	"github.com/go-kit/log/level"
 	"github.com/prometheus/client_golang/prometheus"
+	"github.com/prometheus/client_golang/prometheus/collectors"
 	"github.com/weaveworks/common/logging"
 	"github.com/weaveworks/common/server"
 
@@ -35,7 +36,7 @@ func main() {
 
 	// Run the instrumentation server.
 	registry := prometheus.NewRegistry()
-	registry.MustRegister(prometheus.NewGoCollector())
+	registry.MustRegister(collectors.NewGoCollector())
 
 	i := querytee.NewInstrumentationServer(cfg.ServerMetricsPort, registry)
 	if err := i.Start(); err != nil {
diff --git a/cmd/test-exporter/main.go b/cmd/test-exporter/main.go
index 5697ef1..0094e0f 100644
--- a/cmd/test-exporter/main.go
+++ b/cmd/test-exporter/main.go
@@ -5,13 +5,13 @@ import (
 	"math"
 	"time"
 
-	"github.com/go-kit/kit/log/level"
+	"github.com/go-kit/log/level"
+	"github.com/grafana/dskit/flagext"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/weaveworks/common/server"
 	"github.com/weaveworks/common/tracing"
 
 	"github.com/cortexproject/cortex/pkg/testexporter/correctness"
-	"github.com/cortexproject/cortex/pkg/util/flagext"
 	"github.com/cortexproject/cortex/pkg/util/log"
 )
 
diff --git a/docs/_index.md b/docs/_index.md
index b97ef3a..a11bead 100644
--- a/docs/_index.md
+++ b/docs/_index.md
@@ -36,6 +36,9 @@ should read:
 1. [Getting started with Cortex](getting-started/_index.md)
 1. [Information regarding configuring Cortex](configuration/_index.md)
 
+There are also individual [guides](guides/_index.md) to many tasks.
+Please review the important [security advice](guides/security.md) before deploying.
+
 For a guide to contributing to Cortex, see the [contributor guidelines](contributing/).
 
 ## Further reading
diff --git a/docs/architecture.md b/docs/architecture.md
index 0bf04bb..f5925d4 100644
--- a/docs/architecture.md
+++ b/docs/architecture.md
@@ -117,7 +117,7 @@ Cortex supports two hashing strategies:
 1. Hash the metric name and tenant ID (default)
 2. Hash the metric name, labels and tenant ID (enabled with `-distributor.shard-by-all-labels=true`)
 
-The trade-off associated with the latter is that writes are more balanced across ingesters but each query needs to talk to any ingester since a metric could be spread across multiple ingesters given different label sets.
+The trade-off associated with the latter is that writes are more balanced across ingesters but each query needs to talk to all ingesters since a metric could be spread across multiple ingesters given different label sets.
 
 #### The hash ring
 
diff --git a/docs/blocks-storage/compactor.md b/docs/blocks-storage/compactor.md
index 2134058..ca30832 100644
--- a/docs/blocks-storage/compactor.md
+++ b/docs/blocks-storage/compactor.md
@@ -209,12 +209,12 @@ compactor:
         # CLI flag: -compactor.ring.multi.mirror-timeout
         [mirror_timeout: <duration> | default = 2s]
 
-    # Period at which to heartbeat to the ring.
+    # Period at which to heartbeat to the ring. 0 = disabled.
     # CLI flag: -compactor.ring.heartbeat-period
     [heartbeat_period: <duration> | default = 5s]
 
     # The heartbeat timeout after which compactors are considered unhealthy
-    # within the ring.
+    # within the ring. 0 = never (timeout disabled).
     # CLI flag: -compactor.ring.heartbeat-timeout
     [heartbeat_timeout: <duration> | default = 1m]
 
@@ -230,4 +230,8 @@ compactor:
     # Name of network interface to read address from.
     # CLI flag: -compactor.ring.instance-interface-names
     [instance_interface_names: <list of string> | default = [eth0 en0]]
+
+    # Timeout for waiting on compactor to become ACTIVE in the ring.
+    # CLI flag: -compactor.ring.wait-active-instance-timeout
+    [wait_active_instance_timeout: <duration> | default = 10m]
 ```
diff --git a/docs/blocks-storage/querier.md b/docs/blocks-storage/querier.md
index a7080d4..9bfb2a4 100644
--- a/docs/blocks-storage/querier.md
+++ b/docs/blocks-storage/querier.md
@@ -512,6 +512,11 @@ blocks_storage:
         # CLI flag: -blocks-storage.bucket-store.index-cache.memcached.max-item-size
         [max_item_size: <int> | default = 1048576]
 
+        # Use memcached auto-discovery mechanism provided by some cloud provider
+        # like GCP and AWS
+        # CLI flag: -blocks-storage.bucket-store.index-cache.memcached.auto-discovery
+        [auto_discovery: <boolean> | default = false]
+
     chunks_cache:
       # Backend for chunks cache, if not empty. Supported values: memcached.
       # CLI flag: -blocks-storage.bucket-store.chunks-cache.backend
@@ -559,6 +564,11 @@ blocks_storage:
         # CLI flag: -blocks-storage.bucket-store.chunks-cache.memcached.max-item-size
         [max_item_size: <int> | default = 1048576]
 
+        # Use memcached auto-discovery mechanism provided by some cloud provider
+        # like GCP and AWS
+        # CLI flag: -blocks-storage.bucket-store.chunks-cache.memcached.auto-discovery
+        [auto_discovery: <boolean> | default = false]
+
       # Size of each subrange that bucket object is split into for better
       # caching.
       # CLI flag: -blocks-storage.bucket-store.chunks-cache.subrange-size
@@ -625,6 +635,11 @@ blocks_storage:
         # CLI flag: -blocks-storage.bucket-store.metadata-cache.memcached.max-item-size
         [max_item_size: <int> | default = 1048576]
 
+        # Use memcached auto-discovery mechanism provided by some cloud provider
+        # like GCP and AWS
+        # CLI flag: -blocks-storage.bucket-store.metadata-cache.memcached.auto-discovery
+        [auto_discovery: <boolean> | default = false]
+
       # How long to cache list of tenants in the bucket.
       # CLI flag: -blocks-storage.bucket-store.metadata-cache.tenants-list-ttl
       [tenants_list_ttl: <duration> | default = 15m]
diff --git a/docs/blocks-storage/store-gateway.md b/docs/blocks-storage/store-gateway.md
index d24813b..d82fdcf 100644
--- a/docs/blocks-storage/store-gateway.md
+++ b/docs/blocks-storage/store-gateway.md
@@ -232,13 +232,13 @@ store_gateway:
         # CLI flag: -store-gateway.sharding-ring.multi.mirror-timeout
         [mirror_timeout: <duration> | default = 2s]
 
-    # Period at which to heartbeat to the ring.
+    # Period at which to heartbeat to the ring. 0 = disabled.
     # CLI flag: -store-gateway.sharding-ring.heartbeat-period
     [heartbeat_period: <duration> | default = 15s]
 
     # The heartbeat timeout after which store gateways are considered unhealthy
-    # within the ring. This option needs be set both on the store-gateway and
-    # querier when running in microservices mode.
+    # within the ring. 0 = never (timeout disabled). This option needs be set
+    # both on the store-gateway and querier when running in microservices mode.
     # CLI flag: -store-gateway.sharding-ring.heartbeat-timeout
     [heartbeat_timeout: <duration> | default = 1m]
 
@@ -576,6 +576,11 @@ blocks_storage:
         # CLI flag: -blocks-storage.bucket-store.index-cache.memcached.max-item-size
         [max_item_size: <int> | default = 1048576]
 
+        # Use memcached auto-discovery mechanism provided by some cloud provider
+        # like GCP and AWS
+        # CLI flag: -blocks-storage.bucket-store.index-cache.memcached.auto-discovery
+        [auto_discovery: <boolean> | default = false]
+
     chunks_cache:
       # Backend for chunks cache, if not empty. Supported values: memcached.
       # CLI flag: -blocks-storage.bucket-store.chunks-cache.backend
@@ -623,6 +628,11 @@ blocks_storage:
         # CLI flag: -blocks-storage.bucket-store.chunks-cache.memcached.max-item-size
         [max_item_size: <int> | default = 1048576]
 
+        # Use memcached auto-discovery mechanism provided by some cloud provider
+        # like GCP and AWS
+        # CLI flag: -blocks-storage.bucket-store.chunks-cache.memcached.auto-discovery
+        [auto_discovery: <boolean> | default = false]
+
       # Size of each subrange that bucket object is split into for better
       # caching.
       # CLI flag: -blocks-storage.bucket-store.chunks-cache.subrange-size
@@ -689,6 +699,11 @@ blocks_storage:
         # CLI flag: -blocks-storage.bucket-store.metadata-cache.memcached.max-item-size
         [max_item_size: <int> | default = 1048576]
 
+        # Use memcached auto-discovery mechanism provided by some cloud provider
+        # like GCP and AWS
+        # CLI flag: -blocks-storage.bucket-store.metadata-cache.memcached.auto-discovery
+        [auto_discovery: <boolean> | default = false]
+
       # How long to cache list of tenants in the bucket.
       # CLI flag: -blocks-storage.bucket-store.metadata-cache.tenants-list-ttl
       [tenants_list_ttl: <duration> | default = 15m]
diff --git a/docs/chunks-storage/running-chunks-storage-with-cassandra.md b/docs/chunks-storage/running-chunks-storage-with-cassandra.md
index b2aac69..b0971c3 100644
--- a/docs/chunks-storage/running-chunks-storage-with-cassandra.md
+++ b/docs/chunks-storage/running-chunks-storage-with-cassandra.md
@@ -111,12 +111,12 @@ storage:
 ```
 
 The latest tag is not published for the Cortex docker image. Visit quay.io/repository/cortexproject/cortex
-to find the latest stable version tag and use it in the command below (currently it is `v1.10.0`).
+to find the latest stable version tag and use it in the command below (currently it is `v1.11.1`).
 
 Run Cortex using the latest stable version:
 
 ```
-docker run -d --name=cortex -v $(pwd)/single-process-config.yaml:/etc/single-process-config.yaml -p 9009:9009  quay.io/cortexproject/cortex:v1.10.0 -config.file=/etc/single-process-config.yaml
+docker run -d --name=cortex -v $(pwd)/single-process-config.yaml:/etc/single-process-config.yaml -p 9009:9009  quay.io/cortexproject/cortex:v1.11.1 -config.file=/etc/single-process-config.yaml
 ```
 In case you prefer to run the master version, please follow this [documentation](./chunks-storage-getting-started.md) on how to build Cortex from source.
 
diff --git a/docs/configuration/arguments.md b/docs/configuration/arguments.md
index 997399b..7fdd3b7 100644
--- a/docs/configuration/arguments.md
+++ b/docs/configuration/arguments.md
@@ -142,6 +142,8 @@ The ingester query API was improved over time, but defaults to the old behaviour
 
    **Upgrade notes**: As this flag also makes all queries always read from all ingesters, the upgrade path is pretty trivial; just enable the flag. When you do enable it, you'll see a spike in the number of active series as the writes are "reshuffled" amongst the ingesters, but over the next stale period all the old series will be flushed, and you should end up with much better load balancing. With this flag enabled in the queriers, reads will always catch all the data from all ingesters.
 
+   **Warning**: disabling this flag can lead to a much less balanced distribution of load among the ingesters.
+
 - `-distributor.extra-query-delay`
    This is used by a component with an embedded distributor (Querier and Ruler) to control how long to wait until sending more than the minimum amount of queries needed for a successful response.
 
@@ -531,6 +533,8 @@ The DNS service discovery, inspired from Thanos DNS SD, supports different disco
 
 If **no prefix** is provided, the provided IP or hostname will be used straightaway without pre-resolving it.
 
+If you are using a managed memcached service from [Google Cloud](https://cloud.google.com/memorystore/docs/memcached/auto-discovery-overview), or [AWS](https://docs.aws.amazon.com/AmazonElastiCache/latest/mem-ug/AutoDiscovery.HowAutoDiscoveryWorks.html), use the [auto-discovery](./config-file-reference.md#memcached-client-config) flag instead of DNS discovery, then use the discovery/configuration endpoint as the domain name without any prefix.
+
 ## Logging of IP of reverse proxy
 
 If a reverse proxy is used in front of Cortex it might be diffult to troubleshoot errors. The following 3 settings can be used to log the IP address passed along by the reverse proxy in headers like X-Forwarded-For.
diff --git a/docs/configuration/config-file-reference.md b/docs/configuration/config-file-reference.md
index 801dc78..547ffdb 100644
--- a/docs/configuration/config-file-reference.md
+++ b/docs/configuration/config-file-reference.md
@@ -268,6 +268,10 @@ query_scheduler:
 The `server_config` configures the HTTP and gRPC server of the launched service(s).
 
 ```yaml
+# HTTP server listen network, default tcp
+# CLI flag: -server.http-listen-network
+[http_listen_network: <string> | default = "tcp"]
+
 # HTTP server listen address.
 # CLI flag: -server.http-listen-address
 [http_listen_address: <string> | default = ""]
@@ -280,6 +284,10 @@ The `server_config` configures the HTTP and gRPC server of the launched service(
 # CLI flag: -server.http-conn-limit
 [http_listen_conn_limit: <int> | default = 0]
 
+# gRPC server listen network
+# CLI flag: -server.grpc-listen-network
+[grpc_listen_network: <string> | default = "tcp"]
+
 # gRPC server listen address.
 # CLI flag: -server.grpc-listen-address
 [grpc_listen_address: <string> | default = ""]
@@ -563,12 +571,12 @@ ring:
       # CLI flag: -distributor.ring.multi.mirror-timeout
       [mirror_timeout: <duration> | default = 2s]
 
-  # Period at which to heartbeat to the ring.
+  # Period at which to heartbeat to the ring. 0 = disabled.
   # CLI flag: -distributor.ring.heartbeat-period
   [heartbeat_period: <duration> | default = 5s]
 
   # The heartbeat timeout after which distributors are considered unhealthy
-  # within the ring.
+  # within the ring. 0 = never (timeout disabled).
   # CLI flag: -distributor.ring.heartbeat-timeout
   [heartbeat_timeout: <duration> | default = 1m]
 
@@ -662,6 +670,7 @@ lifecycler:
         [mirror_timeout: <duration> | default = 2s]
 
     # The heartbeat timeout after which ingesters are skipped for reads/writes.
+    # 0 = never (timeout disabled).
     # CLI flag: -ring.heartbeat-timeout
     [heartbeat_timeout: <duration> | default = 1m]
 
@@ -678,7 +687,7 @@ lifecycler:
   # CLI flag: -ingester.num-tokens
   [num_tokens: <int> | default = 128]
 
-  # Period at which to heartbeat to consul.
+  # Period at which to heartbeat to consul. 0 = disabled.
   # CLI flag: -ingester.heartbeat-period
   [heartbeat_period: <duration> | default = 5s]
 
@@ -1580,12 +1589,12 @@ ring:
       # CLI flag: -ruler.ring.multi.mirror-timeout
       [mirror_timeout: <duration> | default = 2s]
 
-  # Period at which to heartbeat to the ring.
+  # Period at which to heartbeat to the ring. 0 = disabled.
   # CLI flag: -ruler.ring.heartbeat-period
   [heartbeat_period: <duration> | default = 5s]
 
   # The heartbeat timeout after which rulers are considered unhealthy within the
-  # ring.
+  # ring. 0 = never (timeout disabled).
   # CLI flag: -ruler.ring.heartbeat-timeout
   [heartbeat_timeout: <duration> | default = 1m]
 
@@ -1616,6 +1625,11 @@ ring:
 # processing will ignore them instead. Subject to sharding.
 # CLI flag: -ruler.disabled-tenants
 [disabled_tenants: <string> | default = ""]
+
+# Report the wall time for ruler queries to complete as a per user metric and as
+# an info level log message.
+# CLI flag: -ruler.query-stats-enabled
+[query_stats_enabled: <boolean> | default = false]
 ```
 
 ### `ruler_storage_config`
@@ -1901,12 +1915,12 @@ sharding_ring:
       # CLI flag: -alertmanager.sharding-ring.multi.mirror-timeout
       [mirror_timeout: <duration> | default = 2s]
 
-  # Period at which to heartbeat to the ring.
+  # Period at which to heartbeat to the ring. 0 = disabled.
   # CLI flag: -alertmanager.sharding-ring.heartbeat-period
   [heartbeat_period: <duration> | default = 15s]
 
   # The heartbeat timeout after which alertmanagers are considered unhealthy
-  # within the ring.
+  # within the ring. 0 = never (timeout disabled).
   # CLI flag: -alertmanager.sharding-ring.heartbeat-timeout
   [heartbeat_timeout: <duration> | default = 1m]
 
@@ -3761,40 +3775,42 @@ The `memberlist_config` configures the Gossip memberlist.
 [randomize_node_name: <boolean> | default = true]
 
 # The timeout for establishing a connection with a remote node, and for
-# read/write operations. Uses memberlist LAN defaults if 0.
+# read/write operations.
 # CLI flag: -memberlist.stream-timeout
-[stream_timeout: <duration> | default = 0s]
+[stream_timeout: <duration> | default = 10s]
 
 # Multiplication factor used when sending out messages (factor * log(N+1)).
 # CLI flag: -memberlist.retransmit-factor
-[retransmit_factor: <int> | default = 0]
+[retransmit_factor: <int> | default = 4]
 
-# How often to use pull/push sync. Uses memberlist LAN defaults if 0.
+# How often to use pull/push sync.
 # CLI flag: -memberlist.pullpush-interval
-[pull_push_interval: <duration> | default = 0s]
+[pull_push_interval: <duration> | default = 30s]
 
-# How often to gossip. Uses memberlist LAN defaults if 0.
+# How often to gossip.
 # CLI flag: -memberlist.gossip-interval
-[gossip_interval: <duration> | default = 0s]
+[gossip_interval: <duration> | default = 200ms]
 
-# How many nodes to gossip to. Uses memberlist LAN defaults if 0.
+# How many nodes to gossip to.
 # CLI flag: -memberlist.gossip-nodes
-[gossip_nodes: <int> | default = 0]
+[gossip_nodes: <int> | default = 3]
 
 # How long to keep gossiping to dead nodes, to give them chance to refute their
-# death. Uses memberlist LAN defaults if 0.
+# death.
 # CLI flag: -memberlist.gossip-to-dead-nodes-time
-[gossip_to_dead_nodes_time: <duration> | default = 0s]
+[gossip_to_dead_nodes_time: <duration> | default = 30s]
 
-# How soon can dead node's name be reclaimed with new address. Defaults to 0,
-# which is disabled.
+# How soon can dead node's name be reclaimed with new address. 0 to disable.
 # CLI flag: -memberlist.dead-node-reclaim-time
 [dead_node_reclaim_time: <duration> | default = 0s]
 
+# Enable message compression. This can be used to reduce bandwidth usage at the
+# cost of slightly more CPU utilization.
+# CLI flag: -memberlist.compression-enabled
+[compression_enabled: <boolean> | default = true]
+
 # Other cluster members to join. Can be specified multiple times. It can be an
-# IP, hostname or an entry specified in the DNS Service Discovery format (see
-# https://cortexmetrics.io/docs/configuration/arguments/#dns-service-discovery
-# for more details).
+# IP, hostname or an entry specified in the DNS Service Discovery format.
 # CLI flag: -memberlist.join
 [join_members: <list of string> | default = []]
 
@@ -4043,11 +4059,9 @@ The `limits_config` configures default and per-tenant limits imposed by Cortex s
 [max_chunks_per_query: <int> | default = 2000000]
 
 # Maximum number of chunks that can be fetched in a single query from ingesters
-# and long-term storage: the total number of actual fetched chunks could be 2x
-# the limit, being independently applied when querying ingesters and long-term
-# storage. This limit is enforced in the ingester (if chunks streaming is
-# enabled), querier, ruler and store-gateway. Takes precedence over the
-# deprecated -store.query-chunk-limit. 0 to disable.
+# and long-term storage. This limit is enforced in the querier, ruler and
+# store-gateway. Takes precedence over the deprecated -store.query-chunk-limit.
+# 0 to disable.
 # CLI flag: -querier.max-fetched-chunks-per-query
 [max_fetched_chunks_per_query: <int> | default = 0]
 
@@ -4169,7 +4183,7 @@ The `limits_config` configures default and per-tenant limits imposed by Cortex s
 # is given in JSON format. Rate limit has the same meaning as
 # -alertmanager.notification-rate-limit, but only applies for specific
 # integration. Allowed integration names: webhook, email, pagerduty, opsgenie,
-# wechat, slack, victorops, pushover.
+# wechat, slack, victorops, pushover, sns.
 # CLI flag: -alertmanager.notification-rate-limit-per-integration
 [alertmanager_notification_rate_limit_per_integration: <map of string to float64> | default = {}]
 
@@ -4751,6 +4765,11 @@ bucket_store:
       # CLI flag: -blocks-storage.bucket-store.index-cache.memcached.max-item-size
       [max_item_size: <int> | default = 1048576]
 
+      # Use memcached auto-discovery mechanism provided by some cloud provider
+      # like GCP and AWS
+      # CLI flag: -blocks-storage.bucket-store.index-cache.memcached.auto-discovery
+      [auto_discovery: <boolean> | default = false]
+
   chunks_cache:
     # Backend for chunks cache, if not empty. Supported values: memcached.
     # CLI flag: -blocks-storage.bucket-store.chunks-cache.backend
@@ -4798,6 +4817,11 @@ bucket_store:
       # CLI flag: -blocks-storage.bucket-store.chunks-cache.memcached.max-item-size
       [max_item_size: <int> | default = 1048576]
 
+      # Use memcached auto-discovery mechanism provided by some cloud provider
+      # like GCP and AWS
+      # CLI flag: -blocks-storage.bucket-store.chunks-cache.memcached.auto-discovery
+      [auto_discovery: <boolean> | default = false]
+
     # Size of each subrange that bucket object is split into for better caching.
     # CLI flag: -blocks-storage.bucket-store.chunks-cache.subrange-size
     [subrange_size: <int> | default = 16000]
@@ -4863,6 +4887,11 @@ bucket_store:
       # CLI flag: -blocks-storage.bucket-store.metadata-cache.memcached.max-item-size
       [max_item_size: <int> | default = 1048576]
 
+      # Use memcached auto-discovery mechanism provided by some cloud provider
+      # like GCP and AWS
+      # CLI flag: -blocks-storage.bucket-store.metadata-cache.memcached.auto-discovery
+      [auto_discovery: <boolean> | default = false]
+
     # How long to cache list of tenants in the bucket.
     # CLI flag: -blocks-storage.bucket-store.metadata-cache.tenants-list-ttl
     [tenants_list_ttl: <duration> | default = 15m]
@@ -5176,12 +5205,12 @@ sharding_ring:
       # CLI flag: -compactor.ring.multi.mirror-timeout
       [mirror_timeout: <duration> | default = 2s]
 
-  # Period at which to heartbeat to the ring.
+  # Period at which to heartbeat to the ring. 0 = disabled.
   # CLI flag: -compactor.ring.heartbeat-period
   [heartbeat_period: <duration> | default = 5s]
 
   # The heartbeat timeout after which compactors are considered unhealthy within
-  # the ring.
+  # the ring. 0 = never (timeout disabled).
   # CLI flag: -compactor.ring.heartbeat-timeout
   [heartbeat_timeout: <duration> | default = 1m]
 
@@ -5197,6 +5226,10 @@ sharding_ring:
   # Name of network interface to read address from.
   # CLI flag: -compactor.ring.instance-interface-names
   [instance_interface_names: <list of string> | default = [eth0 en0]]
+
+  # Timeout for waiting on compactor to become ACTIVE in the ring.
+  # CLI flag: -compactor.ring.wait-active-instance-timeout
+  [wait_active_instance_timeout: <duration> | default = 10m]
 ```
 
 ### `store_gateway_config`
@@ -5250,13 +5283,13 @@ sharding_ring:
       # CLI flag: -store-gateway.sharding-ring.multi.mirror-timeout
       [mirror_timeout: <duration> | default = 2s]
 
-  # Period at which to heartbeat to the ring.
+  # Period at which to heartbeat to the ring. 0 = disabled.
   # CLI flag: -store-gateway.sharding-ring.heartbeat-period
   [heartbeat_period: <duration> | default = 15s]
 
   # The heartbeat timeout after which store gateways are considered unhealthy
-  # within the ring. This option needs be set both on the store-gateway and
-  # querier when running in microservices mode.
+  # within the ring. 0 = never (timeout disabled). This option needs be set both
+  # on the store-gateway and querier when running in microservices mode.
   # CLI flag: -store-gateway.sharding-ring.heartbeat-timeout
   [heartbeat_timeout: <duration> | default = 1m]
 
diff --git a/docs/configuration/v1-guarantees.md b/docs/configuration/v1-guarantees.md
index 8c87104..3af5dd4 100644
--- a/docs/configuration/v1-guarantees.md
+++ b/docs/configuration/v1-guarantees.md
@@ -81,3 +81,17 @@ Currently experimental features are:
   - user config size (`-alertmanager.max-config-size-bytes`)
   - templates count in user config (`-alertmanager.max-templates-count`)
   - max template size (`-alertmanager.max-template-size-bytes`)
+- Disabling ring heartbeat timeouts
+  - `-distributor.ring.heartbeat-timeout=0`
+  - `-ring.heartbeat-timeout=0`
+  - `-ruler.ring.heartbeat-timeout=0`
+  - `-alertmanager.sharding-ring.heartbeat-timeout=0`
+  - `-compactor.ring.heartbeat-timeout=0`
+  - `-store-gateway.sharding-ring.heartbeat-timeout=0`
+- Disabling ring heartbeats
+  - `-distributor.ring.heartbeat-period=0`
+  - `-ingester.heartbeat-period=0`
+  - `-ruler.ring.heartbeat-period=0`
+  - `-alertmanager.sharding-ring.heartbeat-period=0`
+  - `-compactor.ring.heartbeat-period=0`
+  - `-store-gateway.sharding-ring.heartbeat-period=0`
diff --git a/docs/contributing/how-to-add-a-maintainer.md b/docs/contributing/how-to-add-a-maintainer.md
index 0bc9407..d428bcd 100644
--- a/docs/contributing/how-to-add-a-maintainer.md
+++ b/docs/contributing/how-to-add-a-maintainer.md
@@ -5,7 +5,7 @@ weight: 10
 slug: how-to-add-a-maintainer
 ---
 
-New maintainers are proposed by an existing maintainer and are elected by [majority vote](./_index.md#changes-in-maintainership). Once the vote passed, the following steps should be done to add a new member to the maintainers team:
+New maintainers are proposed by an existing maintainer and are elected by [majority vote](./governance.md#voting). Once the vote passed, the following steps should be done to add a new member to the maintainers team:
 
 1. Submit a PR to add the new member to `MAINTAINERS`
 2. Invite to [GitHub organization](https://github.com/orgs/cortexproject/people)
diff --git a/docs/contributing/how-to-upgrade-golang-version.md b/docs/contributing/how-to-upgrade-golang-version.md
index f1c630d..9c700d5 100644
--- a/docs/contributing/how-to-upgrade-golang-version.md
+++ b/docs/contributing/how-to-upgrade-golang-version.md
@@ -14,6 +14,7 @@ To upgrade the Golang version:
    - Update the Docker image tag in `.github/workflows/*`
 2. Upgrade integration tests version
    - Update the Golang version installed in the `integration` job in `.github/workflows/*`
+3. Upgrade the reference to the latest build image called `LATEST_BUILD_IMAGE_TAG` in `Makefile`
 
 If the minimum support Golang version should be upgraded as well:
 
diff --git a/docs/guides/authentication-and-authorisation.md b/docs/guides/authentication-and-authorisation.md
index 423a7db..7a742b8 100644
--- a/docs/guides/authentication-and-authorisation.md
+++ b/docs/guides/authentication-and-authorisation.md
@@ -15,12 +15,19 @@ of protection.
 Typically this means you run Cortex behind a reverse proxy, and you must
 ensure that all callers, both machines sending data over the `remote_write`
 interface and humans sending queries from GUIs, supply credentials
-which identify them and confirm they are authorised.
-
-When configuring the `remote_write` API in Prometheus there is no way to
-add extra headers. The user and password fields of http Basic auth, or
-Bearer token, can be used to convey the tenant ID and/or credentials.
-See the **Cortex-Tenant** section below for one way to solve this.
+which identify them and confirm they are authorised. When configuring the
+`remote_write` API in Prometheus, the user and password fields of http Basic
+auth, or Bearer token, can be used to convey the tenant ID and/or credentials.
+See the [Cortex-Tenant](#cortex-tenant) section below for one way to solve this.
+
+In trusted environments, Prometheus can send the `X-Scope-OrgID` header itself
+by configuring the `headers` field in its [`remote_write` configuration](https://prometheus.io/docs/prometheus/latest/configuration/configuration/#remote_write):
+```
+remote_write:
+  - url: http://<cortex>/prometheus/api/v1/push
+    headers:
+      X-Scope-OrgID: <org>
+```
 
 To disable the multi-tenant functionality, you can pass the argument
 `-auth.enabled=false` to every Cortex component, which will set the OrgID
diff --git a/docs/guides/security.md b/docs/guides/security.md
 new file mode 100644
index 0000000..9659271
--- /dev/null
+++ b/docs/guides/security.md
@@ -0,0 +1,12 @@
+---
+title: "Security"
+linkTitle: "Security"
+weight: 10
+slug: security
+---
+
+Cortex must be deployed with due care over system configuration, using principles such as "least privilege" to limit any exposure due to flaws in the source code.
+
+You must configure authorisation and authentication externally to Cortex; see [this guide](./authentication-and-authorisation.md)
+
+Information about security disclosures and mailing lists is [in the main repo](https://github.com/cortexproject/cortex/blob/master/SECURITY.md)
diff --git a/docs/guides/zone-replication.md b/docs/guides/zone-replication.md
index 56abf3a..a2254d3 100644
--- a/docs/guides/zone-replication.md
+++ b/docs/guides/zone-replication.md
@@ -30,7 +30,7 @@ The Cortex time-series replication is used to hold multiple (typically 3) replic
 
 The `-distributor.shard-by-all-labels` setting has an impact on read availability. When enabled, a metric is sharded across all ingesters and querier needs to fetch series from all ingesters while, when disabled, a metric is sharded only across `<replication factor>` ingesters.
 
-In the event of a large outage impacting ingesters in more than 1 zone, when `-distributor.shard-by-all-labels=true` all queries will fail, while when disabled some queries may still succeed if the ingesters holding the required metric are not impacted by the outage.
+In the event of a large outage impacting ingesters in more than 1 zone, when `-distributor.shard-by-all-labels=true` all queries will fail, while when disabled some queries may still succeed if the ingesters holding the required metric are not impacted by the outage. To learn more about this flag, please refer to [distributor arguments](../configuration/arguments.md#distributor).
 
 ## Store-gateways: blocks replication
 
diff --git a/docs/proposals/block-storage-time-series-deletion.md b/docs/proposals/block-storage-time-series-deletion.md
 new file mode 100644
index 0000000..20d7a34
--- /dev/null
+++ b/docs/proposals/block-storage-time-series-deletion.md
@@ -0,0 +1,255 @@
+---
+title: "Time Series Deletion from Blocks Storage"
+linkTitle: "Time Series Deletion from Blocks Storage"
+weight: 1
+slug: block-storage-time-series-deletion
+---
+
+- Author: [Ilan Gofman](https://github.com/ilangofman)
+- Date: June 2021
+- Status: Proposal
+
+## Problem
+
+Currently, Cortex only implements a time series deletion API for chunk storage.  We present a design for implementing time series deletion with block storage. We would like to have the same API for deleting series as currently implemented in Prometheus and in Cortex with chunk storage.
+
+
+This can be very important for users to have as confidential or accidental data might have been incorrectly pushed and needs to be removed. As well as potentially removing high cardinality data that is causing inefficient queries.
+
+## Related works
+
+As previously mentioned, the deletion feature is already implemented with chunk storage. The main functionality is implemented through the purger service. It accepts requests for deletion and processes them.  At first, when a deletion request is made, a tombstone is created. This is used to filter out the data for queries. After some time, a deletion plan is executed where the data is permanently removed from chunk storage.
+
+Can find more info here:
+
+- [Cortex documentation for chunk store deletion](https://cortexmetrics.io/docs/guides/deleting-series/)
+- [Chunk deletion proposal](https://docs.google.com/document/d/1PeKwP3aGo3xVrR-2qJdoFdzTJxT8FcAbLm2ew_6UQyQ/edit)
+
+
+
+## Background on current storage
+
+With a block-storage configuration, Cortex stores data that could be potentially deleted by a user in:
+
+- Object store (GCS, S3, etc..) for long term storage of blocks
+- Ingesters for more recent data that should be eventually transferred to the object store
+- Cache
+    - Index cache
+    - Metadata cache
+    - Chunks cache (stores the potentially to be deleted data)
+    - Query results cache  (stores the potentially to be deleted data)
+- Compactor during the compaction process
+- Store-gateway
+
+
+## Proposal
+
+The deletion will not happen right away. Initially, the data will be filtered out from queries using tombstones and will be deleted afterward. This will allow the user some time to cancel the delete request.
+
+### API Endpoints
+
+The existing purger service will be used to process the incoming requests for deletion. The API will follow the same structure as the chunk storage endpoints for deletion, which is also based on the Prometheus deletion API.
+
+This will enable the following endpoints for Cortex when using block storage:
+
+`POST /api/v1/admin/tsdb/delete_series` - Accepts [Prometheus style delete request](https://prometheus.io/docs/prometheus/latest/querying/api/#delete-series)  for deleting series.
+
+Parameters:
+
+- `start=<rfc3339 | unix_timestamp>`
+    - Optional. If not provided, will be set to minimum possible time.
+- `end=<rfc3339 | unix_timestamp> `
+    - Optional. If not provided, will be set to maximum possible time (time when request was made). End time cannot be greater than the current UTC time.
+- `match[]=<series_selector>`
+    - Cannot be empty, must contain at least one label matcher argument.
+
+
+`POST /api/v1/admin/tsdb/cancel_delete_request`  - To cancel a request if it has not been processed yet for permanent deletion. This can only be done before the `-purger.delete-request-cancel-period` has passed.
+Parameters:
+
+- `request_id`
+
+`GET /api/v1/admin/tsdb/delete_series` - Get all delete requests id’s and their current status.
+
+Prometheus also implements a [clean_tombstones](https://prometheus.io/docs/prometheus/latest/querying/api/#clean-tombstones) API which is not included in this proposal. The tombstones will be deleted automatically once the permanent deletion has taken place which is described in the section below. By default, this should take approximately 24 hours.
+
+### Deletion Lifecycle
+
+The deletion request lifecycle can follow these 3 states:
+
+1. Pending - Tombstone file is created. During this state, the queriers will be performing query time filtering. The initial time period configured by `-purger.delete-request-cancel-period`, no data will be deleted. Once this period is over, permanent deletion processing will begin and the request is no longer cancellable.
+2. Processed - All requested data has been deleted. Initially, will still need to do query time filtering while waiting for the bucket index and store-gateway to pick up the new blocks. Once that period has passed, will no longer require any query time filtering.
+3. Deleted - The deletion request was cancelled. A grace period configured by `-purger.delete-request-cancel-period` will allow the user some time to cancel the deletion request if it was made by mistake. The request is no longer cancelable after this period has passed.
+
+
+
+### Filtering data during queries while not yet deleted:
+
+Once a deletion request is received, a tombstone entry will be created. The object store such as S3, GCS, Azure storage, can be used to store all the deletion requests. See the section below for more detail on how the tombstones will be stored. Using the tombstones, the querier will be able to filter the to-be-deleted data initially. If a cancel delete request is made, then the tombstone file will be deleted. In addition, the existing cache will be invalidated using cache generation numbers, which are described in the later sections.
+
+The compactor's _BlocksCleaner_ service will scan for new tombstone files and will update the bucket-index with the tombstone information regarding the deletion requests. This will enable the querier to periodically check the bucket index if there are any new tombstone files that are required to be used for filtering. One drawback of this approach is the time it could take to start filtering the data. Since the compactor will update the bucket index with the new tombstones every `-compactor.cleanup-interval` (default 15 min). Then the cached bucket index is refreshed in the querier every `-blocks-storage.bucket-store.sync-interval` (default 15 min). Potentially could take almost 30 min for queriers to start filtering deleted data when using the default values. If the information requested for deletion is confidential/classified, the time delay is something that the user should be aware of, in addition to the time that the data has already been in Cortex.
+
+An additional thing to consider is that this would mean that the bucket-index would have to be enabled for this API to work. Since the plan is to make to the bucket-index mandatory in the future for block storage, this shouldn't be an issue.
+
+Similar to the chunk storage deletion implementation, the initial filtering of the deleted data will be done inside the Querier. This will allow filtering the data read from both the store gateway and the ingester. This functionality already exists for the chunk storage implementation. By implementing it in the querier, this would mean that the ruler will be supported too (ruler internally runs the querier).
+
+#### Storing tombstones in object store
+
+
+The Purger will write the new tombstone entries in a separate folder called `tombstones` in the object store (e.g. S3 bucket) in the respective tenant folder. Each tombstone can have a separate JSON file outlining all the necessary information about the deletion request such as the parameters passed in the request, as well as some meta-data such as the creation date of the file.  The name of the file can be a hash of the API parameters (start, end, markers). This way if a user calls the API twice by accident with the same parameters, it will only create one tombstone. To keep track of the request state, filename extensions can be used. This will allow the tombstone files to be immutable. The 3 different file extensions will be `pending, processed, deleted`. Each time the deletion request moves to a new state, a new file will be added with the same deletion information but a different extension to indicate the new state. The file containing the previous state will be deleted once the new one is created. If a deletion request is cancelled, then a tombstone file with the `.deleted` filename extension will be created.
+
+When it is determined that the request should move to the next state, then it will first write a new file containing the tombstone information to the object store. The information inside the file will be the same except the `stateCreationTime`, which is replaced with the current timestamp. The extension of the new file will be different to reflect the new state. If the new file is successfully written, the file with the previous state is deleted. If the write of the new file fails, then the previous file is not going to be deleted. Next time the service runs to check the state of each tombstone, it will retry creating the new file with the updated state. If the write is successful but the deletion of the old file is unsuccessful then there will be 2 tombstone files with the same filename but different extension. When `BlocksCleaner` writes the tombstones to the bucket index, the compactor will check for duplicate tombstone files but with different extensions. It will use the tombstone with the most recently updated state and try to delete the file with the older state. There could be a scenario where there are two files with the same request ID but different extensions: {`.pending`, `.processed`} or {`.pending`, `.deleted`}. In this case, the `.processed` or `.deleted ` file will be selected as it is always the later state compared to the `pending` state.
+
+The tombstone will be stored in a single JSON file per request and state:
+
+- `/<tenantId>/tombstones/<request_id>.json.<state>`
+
+
+The schema of the JSON file is:
+
+
+```
+{
+  "requestId": <string>,
+  "startTime": <int>,
+  "endTime": <int>,
+  "requestCreationTime": <int>,
+  "stateCreationTime": <int>,
+  "matchers": [
+    "<string matcher 1>",
+    ..,
+    "<string matcher n>"
+    ]
+  },
+  "userID": <string>,
+}
+```
+
+
+Pros:
+- Allows deletion and un-delete to be done in a single operation.
+
+Cons:
+
+- Negative impact on query performance when there are active tombstones. As in the chunk storage implementation, all the series will have to be compared to the matchers contained in the active tombstone files. The impact on performance should be the same as the deletion would have with chunk storage.
+
+- With the default config, potential 30 minute wait for the data to begin filtering if using the default configuration.
+
+#### Invalidating cache
+
+Using block store, the different caches available are:
+- Index cache
+- Metadata cache
+- Chunks cache (stores the potentially to be deleted chunks of data)
+- Query results cache (stores the potentially to be deleted data)
+
+There are two potential caches that could contain deleted data, the chunks cache, and the query results cache. Using the tombstones, the queriers filter out the data received from the ingesters and store-gateway. The cache not being processed through the querier needs to be invalidated to prevent deleted data from coming up in queries.
+
+Firstly, the query results cache needs to be invalidated for each new delete request or a cancellation of one. This can be accomplished by utilizing cache generation numbers. For each tenant, their cache is prefixed with a cache generation number. When the query front-end discovers a cache generation number that is greater than the previous generation number, then it knows to invalidate the query results cache. However, the cache can only be invalidated once the queriers have loaded the tombstones from the bucket index and have begun filtering the data. Otherwise, to-be deleted data might show up in queries and be cached again. One of the way to guarantee that all the queriers are using the new tombstones is to wait until the bucket index staleness period has passed from the time the tombstones have been written to the bucket index. The staleness period can be configured using the following flag: `-blocks-storage.bucket-store.bucket-index.max-stale-period`. We can use the bucket index staleness period as the delay to wait before the cache generation number is increased. A query will fail inside the querier, if the bucket index last update is older the staleness period. Once this period is over, all the queriers should have the updated tombstones and the query results cache can be invalidated.  Here is the proposed method for accomplishing this:
+
+
+- The cache generation number will be a timestamp. The default value will be 0.
+- The bucket index will store the cache generation number.  The query front-end will periodically fetch the bucket index.
+- Inside the compactor, the _BlocksCleaner_ will load the tombstones from object store and update the bucket index accordingly. It will calculate the cache generation number by iterating through all the tombstones and their respective times (next bullet point) and selecting the maximum timestamp that is less than (current time minus  `-blocks-storage.bucket-store.bucket-index.max-stale-period`). This would mean that if a deletion request is made or cancelled, the compactor will only update the cache generation number once the staleness period is over, ensuring that all queriers have the updated tombstones.
+- For requests in a pending or processed state, the `requestCreationTime` will be used when comparing the maximum timestamps. If a request is in a deleted state, it will use the `stateCreationTime` for comparing the timestamps. This means that the cache gets invalidated only once it has been created or deleted, and the bucket index staleness period has passed. The cache will not be invalidated again when a request advances from pending to processed state.
+- The query front-end will fetch the cache generation number from the bucket index. The query front end will compare it to the current cache generation number stored in the front-end. If the cache generation number from the front-end is less than the one from bucket index, then the cache is invalidated.
+
+In regards to the chunks cache, since it is retrieved from the store gateway and passed to the querier, it will be filtered out like the rest of the time series data in the querier using the tombstones, with the mechanism described in the previous section.
+
+### Permanently deleting the data
+
+The proposed approach is to perform the deletions from the compactor. A new background service inside the compactor called _DeletedSeriesCleaner_ can be created and is responsible for executing the deletion.
+
+#### Processing
+
+
+This will happen after a grace period has passed once the API request has been made. By default this should be 24 hours. A background task can be created to process the permanent deletion of time series. This background task can be executed each hour.
+
+To delete the data from the blocks, the same logic as the [Bucket Rewrite Tool](https://thanos.io/tip/components/tools.md/#bucket-rewrite
+) from Thanos can be leveraged. This tool does the following: `tools bucket rewrite rewrites chosen blocks in the bucket, while deleting or modifying series`. The tool itself is a CLI tool that we won’t be using, but instead we can utilize the logic inside it. For more information about the way this tool runs, please see the code [here](https://github.com/thanos-io/thanos/blob/d8b21e708bee6d19f46ca32b158b0509ca9b7fed/cmd/thanos/tools_bucket.go#L809).
+
+The compactor’s _DeletedSeriesCleaner_ will apply this logic on individual blocks and each time it is run, it creates a new block without the data that matched the deletion request. The original individual blocks containing the data that was requested to be deleted, need to be marked for deletion by the compactor.
+
+While deleting the data permanently from the block storage, the `meta.json` files will be used to keep track of the deletion progress. Inside each `meta.json` file, we will add a new field called `tombstonesFiltered`. This will store an array of deletion request id's that were used to create this block. Once the rewrite logic is applied to a block, the new block's `meta.json` file will append the deletion request id(s) used for the rewrite operation inside this field. This will let the _DeletedSeriesCleaner_ know that this block has already processed the particular deletions requests listed in this field. Assuming that the deletion requests are quite rare, the size of the meta.json files should remain small.
+
+The _DeletedSeriesCleaner_ can iterate through all the blocks that the deletion request could apply to. For each of these blocks, if the deletion request ID isn't inside the meta.json `tombstonesFiltered` field, then the compactor can apply the rewrite logic to this block. If there are multiple tombstones that are currently being processing for deletions and apply to a particular block, then the _DeletedSeriesCleaner_ will process both at the same time to prevent additional blocks from being created. If after iterating through all the blocks, it doesn’t find any such blocks requiring deletion, then the `Pending` state is complete and the request progresses to the `Processed` state.
+
+One important thing to note regarding this rewrite tool is that it should not be used at the same time as when another compactor is touching a block. If the tool is run at the same time as compaction on a particular block, it can cause overlap and the data marked for deletion can already be part of the compacted block. To mitigate such issues, these are some of the proposed solutions:
+
+Option 1: Only apply the deletion once the blocks are in the final state of compaction.
+
+Pros:
+- Simpler implementation as everything is contained within the DeletedSeriesCleaner.
+
+Cons:
+- Might have to wait for a longer period of time for the compaction to be finished.
+    - This would mean the earliest time to be able to run the deletion would be once the last time from the block_ranges in the [compactor_config](https://cortexmetrics.io/docs/blocks-storage/compactor/#compactor-configuration) has passed. By default this value is 24 hours, so only once 24 hours have passed and the new compacted blocks have been created, then the rewrite can be safely run.
+
+
+
+
+Option 2: For blocks that still need to be compacted further after the deletion request cancel period is over, the deletion logic can be applied before the blocks are compacted. This will generate a new block which can then be used instead for compaction with other blocks.
+
+Pros:
+- The deletion can be applied earlier than the previous options.
+    - Only applies if the deletion request cancel period is less than the last time interval for compaction is.
+Cons:
+- Added coupling between the compaction and the DeletedSeriesCleaner.
+- Might block compaction for a short time while doing the deletion.
+
+
+
+Once all the applicable blocks have been rewritten without the deleted data, the deletion request state moves to the `Processed` state. Once in this state, the queriers will still have to perform query time filtering using the tombstones until the old blocks that were marked for deletion are no longer queried by the queriers. This will mean that the query time filtering will last for an additional length of `-compactor.deletion-delay + -compactor.cleanup-interval +  -blocks-storage.bucket-store.sync-interval` in the `Processed` state. Once that time period has passed, the queriers should no longer be querying any of the old blocks that were marked for deletion. The tombstone will no longer be used after this.
+
+
+#### Cancelled Delete Requests
+
+If a request was successfully cancelled, then a tombstone file a `.deleted` extension is created. This is done to help ensure that the cache generation number is updated and the query results cache is invalidated. The compactor's blocks cleaner can take care of cleaning up `.deleted` tombstones after a period of time of when they are no longer required for cache invalidation. This can be done after 10 times the bucket index max staleness time period has passed. Before removing the file from the object store, the current cache generation number must greater than or equal to when the tombstone was cancelled.
+
+#### Handling failed/unfinished delete jobs:
+
+Deletions will be completed and the tombstones will be deleted only when the DeletedSeriesCleaner iterates over all blocks that match the time interval and confirms that they have been re-written without the deleted data.  Otherwise, it will keep iterating over the blocks and process the blocks that haven't been rewritten according to the information in the `meta.json` file. In case of any failure that causes the deletion to stop, any unfinished deletions will be resumed once the service is restarted. If the block rewrite was not completed on a particular block, then the original block will not be marked for deletion. The compactor will continue to iterate over the blocks and process the block again.
+
+
+#### Tenant Deletion API
+
+If a request is made to delete a tenant, then all the tombstones will be deleted for that user.
+
+
+## Current Open Questions:
+
+- If the start and end time is very far apart, it might result in a lot of the data being re-written. Since we create a new block without the deleted data and mark the old one for deletion, there may be a period of time with lots of extra blocks and space used for large deletion queries.
+- There will be a delay between the deletion request and the deleted data being filtered during queries.
+    - In Prometheus, there is no delay.
+    - One way to filter out immediately is to load the tombstones during query time but this will cause a negative performance impact.
+- Adding limits to the API such as:
+    - Max number of deletion requests allowed in the last 24 hours for a given tenent.
+    - Max number of pending tombstones for a given tenant.
+
+
+## Alternatives Considered
+
+
+#### Adding a Pre-processing State
+
+The process of permanently deleting the data can be separated into 2 stages, preprocessing and processing.
+
+Pre-processing will begin after the `-purger.delete-request-cancel-period` has passed since the API request has been made. The deletion request will move to a new state called `BuildingPlan`. The compactor will outline all the blocks that may contain data to be deleted. For each separate block that the deletion may be applicable to, the compactor will begin the process by adding a series deletion marker inside the series-deletion-marker.json file. The JSON file will contain an array of deletion request id's that need to be applied to the block, which allows the ability to handle the situation when there are multiple tombstones that could be applicable to a particular block. Then during the processing step, instead of checking the meta.json file, we only need to check if a marker file exists with a specific deletion request id. If the marker file exists, then we apply the rewrite logic.
+
+#### Alternative Permanent Deletion Processing
+
+For processing the actual deletions, an alternative approach is not to wait until the final compaction has been completed and filter out the data during compaction. If the data is marked to be deleted, then don’t include it the new bigger block during compaction. For the remaining blocks where the data wasn’t filtered during compaction, the deletion can be done the same as in the previous section.
+
+Pros:
+
+- The deletion can happen sooner.
+- The rewrite tools creates additional blocks. By filtering the metrics during compaction, the intermediary re-written block will be avoided.
+
+Cons:
+
+- A more complicated implementation requiring add more logic to the compactor
+- Slower compaction if it needs to filter all the data
+- Need to manage which blocks should be deleted with the rewrite vs which blocks already had data filtered during compaction.
+- Would need to run the rewrite logic during and outside of compaction because some blocks that might need to be deleted are already in the final compaction state. So that would mean the deletion functionality has to be implemented in multiple places.
+- Won’t be leveraging the rewrites tools from Thanos for all the deletion, so potentially more work is duplicated
+
diff --git a/docs/proposals/parallel-compaction.md b/docs/proposals/parallel-compaction.md
 new file mode 100644
index 0000000..ee20dbd
--- /dev/null
+++ b/docs/proposals/parallel-compaction.md
@@ -0,0 +1,67 @@
+---
+title: "Parallel Compaction by Time Interval"
+linkTitle: "Parallel Compaction by Time Interval"
+weight: 1
+slug: parallel-compaction
+---
+
+- Author: [Roy Chiang](https://github.com/roystchiang)
+- Date: May 2021
+- Status: Proposed
+---
+
+## Introduction
+As a part of pushing Cortex’s scaling capability at AWS, we have done performance testing with Cortex and found the compactor to be one of the main limiting factors for higher active timeseries limit per tenant. The documentation [Compactor](https://cortexmetrics.io/docs/blocks-storage/compactor/#how-compaction-works) describes the responsibilities of a compactor, and this proposal focuses on the limitations of the current compactor architecture. In the current architecture, compactor has simple sharding, meaning that a single tenant is sharded to a single compactor. The compactor generates compaction groups, which are groups of Prometheus TSDB blocks that can be compacted together, independently of another group. However, a compactor currnetly handles compaction groups of a single tenant iteratively, meaning that blocks belonging non-overlapping times are not compacted in parallel.
+
+Cortex ingesters are responsible for uploading TSDB blocks with data emitted by a tenant. These blocks are considered as level-1 blocks, as they contain duplicate timeseries for the same time interval, depending on the replication factor. [Vertical compaction](https://cortexmetrics.io/docs/blocks-storage/compactor/#how-compaction-works) is done to merge all the blocks with the same time interval and deduplicate the samples. These merged blocks are level-2 blocks. Subsequent compactions such as horizontal compaction can happen, further increasing the compaction level of the blocks.
+
+### Problem and Requirements
+Currently, a compactor is able to compact up to 20M timeseries within 2 hours for a level-2 compaction, including the time to download blocks, compact, and upload the newly compacted block. We would like to increase the timeseries limit per tenant, and compaction is one of the limiting factors. In addition, we would like to achieve the following:
+
+* Compact multiple non-overlapping time intervals concurrently, so we can achieve higher throughput for the compaction of a single tenant
+* We should be able to scale up, down compactor as needed, depending on how many compactions are pending
+* Insight into the compaction progress of a tenant, such as the number of compactions required in order to catch up to the newest blocks
+
+## Design
+
+We accept the fact that a single compaction can potentially take more than 2 hours to compact, and we achieve higher compaction throughput through horizontally scaling the compactor. To compact more blocks in parallel for a single tenant, we distribute the compaction groups to compactors, instead of introducing more parallelism within a compactor.
+
+### Parallelize Work
+
+This proposal builds heavily on top of the [GrafanaLabs approach of introducing parallelism via time intervals](https://github.com/cortexproject/cortex/pull/2616). The difference being that a single tenant is now sharded across multiple compactors instead of just a single compactor. The initial approach will be to work on distinct time intervals, but the compactor planner can be later extended to introduce parallelism within a time interval as well.
+
+The following is an example of parallelize work at each level:
+
+![Parallel Compaction Grouping](/images/proposals/parallel-compaction-grouping.png)
+
+Compactors are shuffle-sharded, meaning that 1 tenant can belong to multiple compactors, and these subset of compactors determine which blocks should be compacted together. Compactors determine amongst themselves the responsibility of the compaction blocks, by using a hash of time interval and tenant id, and putting it on the sharding ring.
+
+The benefit of this approach is that this aligns with what Cortex currently does in Ruler. The downside is that a compaction job can only be assigned to a single compactor, rather than all of the compactors sharded for the tenant. If a compaction job takes forever, other tenants sharded to the same compactor will be blocked until the issue is resolved. With the scheduler approach, any compactor assigned to a given tenant can pick up any work required.
+
+![Parallel Compaction Without Scheduler](/images/proposals/parallel-compaction-without-scheduler.png)
+
+## Scenarios
+
+### Bad block resulting in non-ideal compaction groups
+
+A Cortex operator configures the compaction block range as 2h and 6h. If a full 6-hour block cannot be compacted due to compaction failures, the compactor should not split up the group into subgroups, as this may cause suboptimal grouping of block. Cortex has full information regarding all the available blocks, so we should utilize this information to achieve the best compaction group possible.
+
+## Alternatives
+
+### Shard compaction jobs amongst compactors with a scheduler
+![Parallel Compaction Architecture](/images/proposals/parallel-compaction-design.png)
+
+We add a new component Compactor Scheduler, which is responsible for calculating the compaction plan, and distributing compaction groups to compactors. The planner is sharded by tenant id, so that we can horizontally scale the planner as needed in order to accept more tenants in the cortex cluster. A tenant will have two queues inside the planner, a compaction queue and a clean up queue, similar to how the query frontend currently holds queues of pending queries.
+
+Once a compactor scheduler pushes a job to a compactor, the job is no longer available. Every set interval, or once the compaction is done, a compactor will update the compactor schedule the current status of the compaction job. If a compactor does not provide an update to the scheduler within a timeout, the compaction job becomes available to be assigned to other compactors.
+
+#### Concurrency
+
+To achieve concurrency within a single tenant, compactor scheduler will push jobs to compactors. Compactors are shuffle-sharded by tenant id, to prevent a large tenant from impacting the compaction of other tenants. Compactor will download blocks from long term storage, compact, and upload. Compactor will also pull from the clean up queues from scheduler, and delete blocks marked for deletion.
+
+#### Consistency
+
+On resharding of compactor schedulers, a tenant might move to a different scheduler. We can either drop the current compactor job in order to prevent duplicate compaction jobs, or continue compaction. I propose that the compactor drops the compaction job if the compaction group no longer belongs to the original compactor scheduler. This way, we do not have duplicate compactions happening, and we can minimize work wasted.
+
+### Contribute to Thanos for a more scalable compactor
+Instead of introducing parallelism on the Cortex compactor level, we move the parallelism to the Thanos compactor itself. Thanos has a [proposal to make compactor more scalable](https://docs.google.com/document/d/1xi0V8DB0hE54XgkogJRnNL6yH7C5JThJywlLFoC6dCQ/), and a [PR](https://github.com/thanos-io/thanos/pull/3807). Cortex will enjoy higher throughput per tenant if Thanos is able to speed up the compaction, and we can keep the Cortex architecture the same. However, this approach means that a single tenant is still sharded to a single compactor. In order to compact more groups at once, we must scale up compactor vertically. Although vertical scaling can get us far, we should scale horizontally where we can.
diff --git a/go.mod b/go.mod
index 0b795d5..4d77a1d 100644
--- a/go.mod
+++ b/go.mod
@@ -3,39 +3,36 @@ module github.com/cortexproject/cortex
 go 1.16
 
 require (
-	cloud.google.com/go/bigtable v1.2.0
+	cloud.google.com/go/bigtable v1.3.0
 	cloud.google.com/go/storage v1.10.0
-	github.com/Azure/azure-pipeline-go v0.2.2
-	github.com/Azure/azure-storage-blob-go v0.8.0
+	github.com/Azure/azure-pipeline-go v0.2.3
+	github.com/Azure/azure-storage-blob-go v0.13.0
 	github.com/Masterminds/squirrel v0.0.0-20161115235646-20f192218cf5
 	github.com/NYTimes/gziphandler v1.1.1
 	github.com/alecthomas/units v0.0.0-20210208195552-ff826a37aa15
 	github.com/alicebob/miniredis/v2 v2.14.3
-	github.com/armon/go-metrics v0.3.6
-	github.com/aws/aws-sdk-go v1.38.35
+	github.com/aws/aws-sdk-go v1.40.45
 	github.com/bradfitz/gomemcache v0.0.0-20190913173617-a41fca850d0b
 	github.com/cespare/xxhash v1.1.0
 	github.com/dustin/go-humanize v1.0.0
 	github.com/facette/natsort v0.0.0-20181210072756-2cd4dd1e2dcb
 	github.com/felixge/fgprof v0.9.1
 	github.com/fsouza/fake-gcs-server v1.7.0
-	github.com/go-kit/kit v0.10.0
-	github.com/go-openapi/strfmt v0.20.1
+	github.com/go-kit/kit v0.12.0 // indirect
+	github.com/go-kit/log v0.2.0
+	github.com/go-openapi/strfmt v0.20.2
 	github.com/go-openapi/swag v0.19.15
 	github.com/go-redis/redis/v8 v8.9.0
 	github.com/gocql/gocql v0.0.0-20200526081602-cd04bd7f22a7
 	github.com/gogo/protobuf v1.3.2
-	github.com/gogo/status v1.0.3
+	github.com/gogo/status v1.1.0
 	github.com/golang-migrate/migrate/v4 v4.7.0
 	github.com/golang/protobuf v1.5.2
-	github.com/golang/snappy v0.0.3
-	github.com/gorilla/mux v1.7.3
-	github.com/grpc-ecosystem/go-grpc-middleware v1.2.2
-	github.com/hashicorp/consul/api v1.8.1
-	github.com/hashicorp/go-cleanhttp v0.5.1
-	github.com/hashicorp/go-sockaddr v1.0.2
-	github.com/hashicorp/memberlist v0.2.3
-	github.com/json-iterator/go v1.1.11
+	github.com/golang/snappy v0.0.4
+	github.com/gorilla/mux v1.8.0
+	github.com/grafana/dskit v0.0.0-20210908150159-fcf48cb19aa4
+	github.com/grpc-ecosystem/go-grpc-middleware v1.3.0
+	github.com/json-iterator/go v1.1.12
 	github.com/lib/pq v1.3.0
 	github.com/minio/minio-go/v7 v7.0.10
 	github.com/mitchellh/go-wordwrap v1.0.0
@@ -45,28 +42,25 @@ require (
 	github.com/opentracing-contrib/go-stdlib v1.0.0
 	github.com/opentracing/opentracing-go v1.2.0
 	github.com/pkg/errors v0.9.1
-	github.com/prometheus/alertmanager v0.22.1-0.20210603124511-8b584eb2265e
-	github.com/prometheus/client_golang v1.10.0
+	github.com/prometheus/alertmanager v0.23.1-0.20210914172521-e35efbddb66a
+	github.com/prometheus/client_golang v1.11.0
 	github.com/prometheus/client_model v0.2.0
-	github.com/prometheus/common v0.26.1-0.20210603143733-6ef301f414bf
-	github.com/prometheus/prometheus v1.8.2-0.20210510213326-e313ffa8abf6
+	github.com/prometheus/common v0.30.0
+	github.com/prometheus/prometheus v1.8.2-0.20210914090109-37468d88dce8
 	github.com/segmentio/fasthash v0.0.0-20180216231524-a72b379d632e
 	github.com/sony/gobreaker v0.4.1
-	github.com/spf13/afero v1.2.2
+	github.com/spf13/afero v1.3.4
 	github.com/stretchr/testify v1.7.0
-	github.com/thanos-io/thanos v0.19.1-0.20210427154226-d5bd651319d2
-	github.com/uber/jaeger-client-go v2.28.0+incompatible
-	github.com/weaveworks/common v0.0.0-20210419092856-009d1eebd624
-	go.etcd.io/bbolt v1.3.5
-	go.etcd.io/etcd v0.5.0-alpha.5.0.20200520232829-54ba9589114f
-	go.etcd.io/etcd/client/v3 v3.5.0-alpha.0.0.20210225194612-fa82d11a958a
-	go.etcd.io/etcd/server/v3 v3.5.0-alpha.0.0.20210225194612-fa82d11a958a
-	go.uber.org/atomic v1.7.0
-	golang.org/x/net v0.0.0-20210525063256-abc453219eb5
+	github.com/thanos-io/thanos v0.22.0
+	github.com/uber/jaeger-client-go v2.29.1+incompatible
+	github.com/weaveworks/common v0.0.0-20210901124008-1fa3f9fa874c
+	go.etcd.io/bbolt v1.3.6
+	go.uber.org/atomic v1.9.0
+	golang.org/x/net v0.0.0-20210917221730-978cfadd31cf
 	golang.org/x/sync v0.0.0-20210220032951-036812b2e83c
-	golang.org/x/time v0.0.0-20210220033141-f8bda1e9f3ba
-	google.golang.org/api v0.46.0
-	google.golang.org/grpc v1.37.0
+	golang.org/x/time v0.0.0-20210723032227-1f47c861a9ac
+	google.golang.org/api v0.56.0
+	google.golang.org/grpc v1.40.0
 	gopkg.in/yaml.v2 v2.4.0
 	gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b
 	sigs.k8s.io/yaml v1.2.0
@@ -84,3 +78,12 @@ replace github.com/gocql/gocql => github.com/grafana/gocql v0.0.0-20200605141915
 
 // Using a 3rd-party branch for custom dialer - see https://github.com/bradfitz/gomemcache/pull/86
 replace github.com/bradfitz/gomemcache => github.com/themihai/gomemcache v0.0.0-20180902122335-24332e2d58ab
+
+// TODO review the change introduced by https://github.com/grpc/grpc-go/pull/4416 before upgrading to 1.39.0
+replace google.golang.org/grpc => google.golang.org/grpc v1.38.0
+
+replace github.com/thanos-io/thanos v0.22.0 => github.com/thanos-io/thanos v0.19.1-0.20210923155558-c15594a03c45
+
+// Pin aws-sdk to version prior to go-kit update, to reduce the bulk of change.
+// Un-pin once Cortex 1.11 is released.
+replace github.com/aws/aws-sdk-go => github.com/aws/aws-sdk-go v1.40.37
diff --git a/go.sum b/go.sum
index 251c4c9..3ff73d9 100644
--- a/go.sum
+++ b/go.sum
@@ -1,4 +1,4 @@
-cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+bazil.org/fuse v0.0.0-20160811212531-371fbbdaa898/go.mod h1:Xbm+BRKSBEpa4q4hTSxohYNQpsxXPbPry4JJWOB3LB8=
 cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
 cloud.google.com/go v0.37.4/go.mod h1:NHPJ89PdicEuT9hdPXMROBD91xc5uRDxsMtSB16k7hw=
 cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU=
@@ -21,8 +21,14 @@ cloud.google.com/go v0.72.0/go.mod h1:M+5Vjvlc2wnp6tjzE102Dw08nGShTscUx2nZMufOKP
 cloud.google.com/go v0.74.0/go.mod h1:VV1xSbzvo+9QJOxLDaJfTjx5e+MePCpCWwvftOeQmWk=
 cloud.google.com/go v0.78.0/go.mod h1:QjdrLG0uq+YwhjoVOLsS1t7TW8fs36kLs4XO5R5ECHg=
 cloud.google.com/go v0.79.0/go.mod h1:3bzgcEeQlzbuEAYu4mrWhKqWjmpprinYgKJLgKHnbb8=
-cloud.google.com/go v0.81.0 h1:at8Tk2zUz63cLPR0JPWm5vp77pEZmzxEQBEfRKn1VV8=
 cloud.google.com/go v0.81.0/go.mod h1:mk/AM35KwGk/Nm2YSeZbxXdrNK3KZOYHmLkOqC2V6E0=
+cloud.google.com/go v0.83.0/go.mod h1:Z7MJUsANfY0pYPdw0lbnivPx4/vhy/e2FEkSkF7vAVY=
+cloud.google.com/go v0.84.0/go.mod h1:RazrYuxIK6Kb7YrzzhPoLmCVzl7Sup4NrbKPg8KHSUM=
+cloud.google.com/go v0.87.0/go.mod h1:TpDYlFy7vuLzZMMZ+B6iRiELaY7z/gJPaqbMx6mlWcY=
+cloud.google.com/go v0.90.0/go.mod h1:kRX0mNRHe0e2rC6oNakvwQqzyDmg57xJ+SZU1eT2aDQ=
+cloud.google.com/go v0.92.2/go.mod h1:8utlLll2EF5XMAV15woO4lSbWQlk8rer9aLOfLh7+YI=
+cloud.google.com/go v0.93.3 h1:wPBktZFzYBcCZVARvwVKqH1uEj+aLXofJEtrb4oOsio=
+cloud.google.com/go v0.93.3/go.mod h1:8utlLll2EF5XMAV15woO4lSbWQlk8rer9aLOfLh7+YI=
 cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o=
 cloud.google.com/go/bigquery v1.3.0/go.mod h1:PjpwJnslEMmckchkHFfq+HTD2DmtT67aNFKH1/VBDHE=
 cloud.google.com/go/bigquery v1.4.0/go.mod h1:S8dzgnTigyfTmLBfrtrhyYhwRxG72rYxvftPBK2Dvzc=
@@ -30,8 +36,9 @@ cloud.google.com/go/bigquery v1.5.0/go.mod h1:snEHRnqQbz117VIFhE8bmtwIDY80NLUZUM
 cloud.google.com/go/bigquery v1.7.0/go.mod h1://okPTzCYNXSlb24MZs83e2Do+h+VXtc4gLoIoXIAPc=
 cloud.google.com/go/bigquery v1.8.0/go.mod h1:J5hqkt3O0uAFnINi6JXValWIb1v0goeZM77hZzJN/fQ=
 cloud.google.com/go/bigtable v1.1.0/go.mod h1:B6ByKcIdYmhoyDzmOnQxyOhN6r05qnewYIxxG6L0/b4=
-cloud.google.com/go/bigtable v1.2.0 h1:F4cCmA4nuV84V5zYQ3MKY+M1Cw1avHDuf3S/LcZPA9c=
 cloud.google.com/go/bigtable v1.2.0/go.mod h1:JcVAOl45lrTmQfLj7T6TxyMzIN/3FGGcFm+2xVAli2o=
+cloud.google.com/go/bigtable v1.3.0 h1:PAplkJLXheOLlK5PPyy4/HXtPzHn+1/LaYDWIeGxnio=
+cloud.google.com/go/bigtable v1.3.0/go.mod h1:z5EyKrPE8OQmeg4h5MNdKvuSnI9CCT49Ki3f23aBzio=
 cloud.google.com/go/datastore v1.0.0/go.mod h1:LXYbyblFSglQ5pkeyhO+Qmw7ukd3C+pD7TKLgZqpHYE=
 cloud.google.com/go/datastore v1.1.0/go.mod h1:umbIZjpQpHh4hmRpGhH4tLFup+FVzqBi1b3c64qFpCk=
 cloud.google.com/go/firestore v1.1.0/go.mod h1:ulACoGHTpvq5r8rxGJ4ddJZBZqakUQqClKRT5SZwBmk=
@@ -46,14 +53,18 @@ cloud.google.com/go/storage v1.6.0/go.mod h1:N7U0C8pVQ/+NIKOBQyamJIeKQKkZ+mxpohl
 cloud.google.com/go/storage v1.8.0/go.mod h1:Wv1Oy7z6Yz3DshWRJFhqM/UCfaWIRTdp0RXyy7KQOVs=
 cloud.google.com/go/storage v1.10.0 h1:STgFzyU5/8miMl0//zKh2aQeTyeaUH3WN9bSUiJ09bA=
 cloud.google.com/go/storage v1.10.0/go.mod h1:FLPqc6j+Ki4BU591ie1oL6qBQGu2Bl/tZ9ullr3+Kg0=
+cloud.google.com/go/trace v0.1.0/go.mod h1:wxEwsoeRVPbeSkt7ZC9nWCgmoKQRAoySN7XHW2AmI7g=
 collectd.org v0.3.0/go.mod h1:A/8DzQBkF6abtvrT2j/AU/4tiBgJWYyh0y/oB/4MlWE=
 contrib.go.opencensus.io/exporter/ocagent v0.6.0/go.mod h1:zmKjrJcdo0aYcVS7bmEeSEBLPA9YJp5bjrofdU3pIXs=
 dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
 github.com/Azure/azure-pipeline-go v0.2.1/go.mod h1:UGSo8XybXnIGZ3epmeBw7Jdz+HiUVpqIlpz/HKHylF4=
-github.com/Azure/azure-pipeline-go v0.2.2 h1:6oiIS9yaG6XCCzhgAgKFfIWyo4LLCiDhZot6ltoThhY=
 github.com/Azure/azure-pipeline-go v0.2.2/go.mod h1:4rQ/NZncSvGqNkkOsNpOU1tgoNuIlp9AfUH5G1tvCHc=
+github.com/Azure/azure-pipeline-go v0.2.3 h1:7U9HBg1JFK3jHl5qmo4CTZKFTVgMwdFHMVtCdfBE21U=
+github.com/Azure/azure-pipeline-go v0.2.3/go.mod h1:x841ezTBIMG6O3lAcl8ATHnsOPVl2bqk7S3ta6S6u4k=
+github.com/Azure/azure-sdk-for-go v16.2.1+incompatible/go.mod h1:9XXNKU+eRnpl9moKnB4QOLf1HestfXbmab5FXxiDBjc=
 github.com/Azure/azure-sdk-for-go v23.2.0+incompatible/go.mod h1:9XXNKU+eRnpl9moKnB4QOLf1HestfXbmab5FXxiDBjc=
 github.com/Azure/azure-sdk-for-go v36.1.0+incompatible/go.mod h1:9XXNKU+eRnpl9moKnB4QOLf1HestfXbmab5FXxiDBjc=
+github.com/Azure/azure-sdk-for-go v41.3.0+incompatible/go.mod h1:9XXNKU+eRnpl9moKnB4QOLf1HestfXbmab5FXxiDBjc=
 github.com/Azure/azure-sdk-for-go v43.0.0+incompatible/go.mod h1:9XXNKU+eRnpl9moKnB4QOLf1HestfXbmab5FXxiDBjc=
 github.com/Azure/azure-sdk-for-go v44.0.0+incompatible/go.mod h1:9XXNKU+eRnpl9moKnB4QOLf1HestfXbmab5FXxiDBjc=
 github.com/Azure/azure-sdk-for-go v44.2.0+incompatible/go.mod h1:9XXNKU+eRnpl9moKnB4QOLf1HestfXbmab5FXxiDBjc=
@@ -62,34 +73,55 @@ github.com/Azure/azure-sdk-for-go v46.4.0+incompatible/go.mod h1:9XXNKU+eRnpl9mo
 github.com/Azure/azure-sdk-for-go v48.2.0+incompatible/go.mod h1:9XXNKU+eRnpl9moKnB4QOLf1HestfXbmab5FXxiDBjc=
 github.com/Azure/azure-sdk-for-go v51.2.0+incompatible/go.mod h1:9XXNKU+eRnpl9moKnB4QOLf1HestfXbmab5FXxiDBjc=
 github.com/Azure/azure-sdk-for-go v52.5.0+incompatible/go.mod h1:9XXNKU+eRnpl9moKnB4QOLf1HestfXbmab5FXxiDBjc=
-github.com/Azure/azure-sdk-for-go v54.0.0+incompatible h1:Bq3L9LF0DHCexlT0fccwxgrOMfjHx8LGz+d+L7gGQv4=
 github.com/Azure/azure-sdk-for-go v54.0.0+incompatible/go.mod h1:9XXNKU+eRnpl9moKnB4QOLf1HestfXbmab5FXxiDBjc=
-github.com/Azure/azure-storage-blob-go v0.8.0 h1:53qhf0Oxa0nOjgbDeeYPUeyiNmafAFEY95rZLK0Tj6o=
+github.com/Azure/azure-sdk-for-go v55.2.0+incompatible/go.mod h1:9XXNKU+eRnpl9moKnB4QOLf1HestfXbmab5FXxiDBjc=
+github.com/Azure/azure-sdk-for-go v57.1.0+incompatible h1:TKQ3ieyB0vVKkF6t9dsWbMjq56O1xU3eh3Ec09v6ajM=
+github.com/Azure/azure-sdk-for-go v57.1.0+incompatible/go.mod h1:9XXNKU+eRnpl9moKnB4QOLf1HestfXbmab5FXxiDBjc=
 github.com/Azure/azure-storage-blob-go v0.8.0/go.mod h1:lPI3aLPpuLTeUwh1sViKXFxwl2B6teiRqI0deQUvsw0=
+github.com/Azure/azure-storage-blob-go v0.13.0 h1:lgWHvFh+UYBNVQLFHXkvul2f6yOPA9PIH82RTG2cSwc=
+github.com/Azure/azure-storage-blob-go v0.13.0/go.mod h1:pA9kNqtjUeQF2zOSu4s//nUdBD+e64lEuc4sVnuOfNs=
 github.com/Azure/go-ansiterm v0.0.0-20170929234023-d6e3b3328b78 h1:w+iIsaOQNcT7OZ575w+acHgRric5iCyQh+xv+KJ4HB8=
 github.com/Azure/go-ansiterm v0.0.0-20170929234023-d6e3b3328b78/go.mod h1:LmzpDX56iTiv29bbRTIsUNlaFfuhWRQBWjQdVyAevI8=
+github.com/Azure/go-autorest v10.8.1+incompatible/go.mod h1:r+4oMnoxhatjLLJ6zxSWATqVooLgysK6ZNox3g/xq24=
 github.com/Azure/go-autorest v11.2.8+incompatible/go.mod h1:r+4oMnoxhatjLLJ6zxSWATqVooLgysK6ZNox3g/xq24=
 github.com/Azure/go-autorest v14.2.0+incompatible h1:V5VMDjClD3GiElqLWO7mz2MxNAK/vTfRHdAubSIPRgs=
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 github.com/Azure/go-autorest/autorest v0.9.3-0.20191028180845-3492b2aff503/go.mod h1:xyHB1BMZT0cuDHU7I0+g046+BFDTQ8rEZB0s4Yfa6bI=
+github.com/Azure/go-autorest/autorest v0.9.3/go.mod h1:GsRuLYvwzLjjjRoWEIyMUaYq8GNUx2nRB378IPt/1p0=
+github.com/Azure/go-autorest/autorest v0.10.0/go.mod h1:/FALq9T/kS7b5J5qsQ+RSTUdAmGFqi0vUdVNNx8q630=
+github.com/Azure/go-autorest/autorest v0.10.1/go.mod h1:/FALq9T/kS7b5J5qsQ+RSTUdAmGFqi0vUdVNNx8q630=
 github.com/Azure/go-autorest/autorest v0.10.2/go.mod h1:/FALq9T/kS7b5J5qsQ+RSTUdAmGFqi0vUdVNNx8q630=
 github.com/Azure/go-autorest/autorest v0.11.1/go.mod h1:JFgpikqFJ/MleTTxwepExTKnFUKKszPS8UavbQYUMuw=
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 github.com/Azure/go-autorest/autorest v0.11.4/go.mod h1:JFgpikqFJ/MleTTxwepExTKnFUKKszPS8UavbQYUMuw=
 github.com/Azure/go-autorest/autorest v0.11.10/go.mod h1:eipySxLmqSyC5s5k1CLupqet0PSENBEDP93LQ9a8QYw=
 github.com/Azure/go-autorest/autorest v0.11.11/go.mod h1:eipySxLmqSyC5s5k1CLupqet0PSENBEDP93LQ9a8QYw=
-github.com/Azure/go-autorest/autorest v0.11.18 h1:90Y4srNYrwOtAgVo3ndrQkTYn6kf1Eg/AjTFJ8Is2aM=
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 github.com/Azure/go-autorest/autorest v0.11.18/go.mod h1:dSiJPy22c3u0OtOKDNttNgqpNFY/GeWa7GH/Pz56QRA=
+github.com/Azure/go-autorest/autorest v0.11.19/go.mod h1:dSiJPy22c3u0OtOKDNttNgqpNFY/GeWa7GH/Pz56QRA=
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+github.com/Azure/go-autorest/autorest/adal v0.9.15 h1:X+p2GF0GWyOiSmqohIaEeuNFNDY4I4EOlVuUQvFdWMk=
+github.com/Azure/go-autorest/autorest/adal v0.9.15/go.mod h1:tGMin8I49Yij6AQ+rvV+Xa/zwxYQB5hmsd6DkfAx2+A=
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@@ -344,13 +540,20 @@ github.com/docker/docker v0.7.3-0.20190817195342-4760db040282/go.mod h1:eEKB0N0r
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@@ -363,6 +566,10 @@ github.com/eclipse/paho.mqtt.golang v1.2.0/go.mod h1:H9keYFcgq3Qr5OUJm/JZI/i6U7j
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@@ -371,60 +578,76 @@ github.com/elazarl/goproxy v0.0.0-20170405201442-c4fc26588b6e/go.mod h1:/Zj4wYkg
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@@ -519,8 +743,9 @@ github.com/go-openapi/strfmt v0.19.4/go.mod h1:eftuHTlB/dI8Uq8JJOyRlieZf+WkkxUuk
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@@ -548,15 +773,20 @@ github.com/go-openapi/validate v0.19.15/go.mod h1:tbn/fdOwYHgrhPBzidZfJC2MIVvs9G
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@@ -586,13 +816,20 @@ github.com/gobuffalo/syncx v0.0.0-20190224160051-33c29581e754/go.mod h1:HhnNqWY9
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@@ -615,10 +856,10 @@ github.com/golang/groupcache v0.0.0-20190129154638-5b532d6fd5ef/go.mod h1:cIg4er
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@@ -626,6 +867,7 @@ github.com/golang/mock v1.4.1/go.mod h1:UOMv5ysSaYNkG+OFQykRIcU/QvvxJf3p21QfJ2Bt
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@@ -649,15 +891,19 @@ github.com/golang/snappy v0.0.0-20180518054509-2e65f85255db/go.mod h1:/XxbfmMg8l
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 go.etcd.io/etcd/server/v3 v3.5.0-alpha.0.0.20210225194612-fa82d11a958a/go.mod h1:tsKetYpt980ZTpzl/gb+UOJj9RkIyCb1u4wjzMg90BQ=
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 go.mongodb.org/mongo-driver v1.1.0/go.mod h1:u7ryQJ+DOzQmeO7zB6MHyr8jkEQvC8vH7qLUO4lqsUM=
@@ -1484,6 +1958,7 @@ go.mongodb.org/mongo-driver v1.4.4/go.mod h1:WcMNYLx/IlOxLe6JRJiv2uXuCz6zBLndR4S
 go.mongodb.org/mongo-driver v1.4.6/go.mod h1:WcMNYLx/IlOxLe6JRJiv2uXuCz6zBLndR4SoGjYphSc=
 go.mongodb.org/mongo-driver v1.5.1 h1:9nOVLGDfOaZ9R0tBumx/BcuqkbFpyTCU2r/Po7A2azI=
 go.mongodb.org/mongo-driver v1.5.1/go.mod h1:gRXCHX4Jo7J0IJ1oDQyUxF7jfy19UfxniMS4xxMmUqw=
+go.mozilla.org/pkcs7 v0.0.0-20200128120323-432b2356ecb1/go.mod h1:SNgMg+EgDFwmvSmLRTNKC5fegJjB7v23qTQ0XLGUNHk=
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 go.opencensus.io v0.21.0/go.mod h1:mSImk1erAIZhrmZN+AvHh14ztQfjbGwt4TtuofqLduU=
@@ -1494,41 +1969,66 @@ go.opencensus.io v0.22.4/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
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@@ -1543,21 +2043,28 @@ golang.org/x/crypto v0.0.0-20190605123033-f99c8df09eb5/go.mod h1:yigFU9vqHzYiE8U
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@@ -1577,7 +2084,6 @@ golang.org/x/exp v0.0.0-20200821190819-94841d0725da/go.mod h1:3jZMyOhIsHpP37uCMk
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@@ -1587,8 +2093,9 @@ golang.org/x/lint v0.0.0-20190930215403-16217165b5de/go.mod h1:6SW0HCj/g11FgYtHl
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@@ -1598,13 +2105,13 @@ golang.org/x/mod v0.1.1-0.20191107180719-034126e5016b/go.mod h1:QqPTAvyqsEbceGzB
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-golang.org/x/mod v0.4.1 h1:Kvvh58BN8Y9/lBi7hTekvtMpm07eUZ0ck5pRHpsMWrY=
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@@ -1622,6 +2129,7 @@ golang.org/x/net v0.0.0-20190503192946-f4e77d36d62c/go.mod h1:t9HGtf8HONx5eT2rtn
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@@ -1663,11 +2171,19 @@ golang.org/x/net v0.0.0-20210224082022-3d97a244fca7/go.mod h1:m0MpNAwzfU5UDzcl9v
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@@ -1684,8 +2200,11 @@ golang.org/x/oauth2 v0.0.0-20210220000619-9bb904979d93/go.mod h1:KelEdhl1UZF7XfJ
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@@ -1702,7 +2221,6 @@ golang.org/x/sync v0.0.0-20210220032951-036812b2e83c h1:5KslGYwFpkhGh+Q16bwMP3cO
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@@ -1710,6 +2228,7 @@ golang.org/x/sys v0.0.0-20181107165924-66b7b1311ac8/go.mod h1:STP8DvDyc/dI5b8T5h
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@@ -1725,13 +2244,18 @@ golang.org/x/sys v0.0.0-20190425145619-16072639606e/go.mod h1:h1NjWce9XRLGQEsW7w
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@@ -1748,15 +2272,18 @@ golang.org/x/sys v0.0.0-20191025021431-6c3a3bfe00ae/go.mod h1:h1NjWce9XRLGQEsW7w
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@@ -1778,16 +2305,25 @@ golang.org/x/sys v0.0.0-20200625212154-ddb9806d33ae/go.mod h1:h1NjWce9XRLGQEsW7w
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@@ -1802,11 +2338,24 @@ golang.org/x/sys v0.0.0-20210314195730-07df6a141424/go.mod h1:h1NjWce9XRLGQEsW7w
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@@ -1819,8 +2368,9 @@ golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
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@@ -1828,15 +2378,15 @@ golang.org/x/time v0.0.0-20191024005414-555d28b269f0/go.mod h1:tRJNPiyCQ0inRvYxb
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@@ -1890,18 +2440,22 @@ golang.org/x/tools v0.0.0-20200212150539-ea181f53ac56/go.mod h1:TB2adYChydJhpapK
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@@ -1917,8 +2471,13 @@ golang.org/x/tools v0.0.0-20201208233053-a543418bbed2/go.mod h1:emZCQorbCU4vsT4f
 golang.org/x/tools v0.0.0-20201224043029-2b0845dc783e/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
 golang.org/x/tools v0.0.0-20210105154028-b0ab187a4818/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
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-golang.org/x/tools v0.1.0 h1:po9/4sTYwZU9lPhi1tOrb4hCv3qrhiQ77LZfGa2OjwY=
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 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
@@ -1927,9 +2486,11 @@ golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8T
 gonum.org/v1/gonum v0.0.0-20180816165407-929014505bf4/go.mod h1:Y+Yx5eoAFn32cQvJDxZx5Dpnq+c3wtXuadVZAcxbbBo=
 gonum.org/v1/gonum v0.0.0-20181121035319-3f7ecaa7e8ca/go.mod h1:Y+Yx5eoAFn32cQvJDxZx5Dpnq+c3wtXuadVZAcxbbBo=
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 gonum.org/v1/netlib v0.0.0-20181029234149-ec6d1f5cefe6/go.mod h1:wa6Ws7BG/ESfp6dHfk7C6KdzKA7wR7u/rKwOGE66zvw=
 gonum.org/v1/netlib v0.0.0-20190313105609-8cb42192e0e0/go.mod h1:wa6Ws7BG/ESfp6dHfk7C6KdzKA7wR7u/rKwOGE66zvw=
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@@ -1957,9 +2518,14 @@ google.golang.org/api v0.40.0/go.mod h1:fYKFpnQN0DsDSKRVRcQSDQNtqWPfM9i+zNPxepjR
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-google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
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@@ -1969,6 +2535,8 @@ google.golang.org/appengine v1.6.5/go.mod h1:8WjMMxjGQR8xUklV/ARdw2HLXBOI7O7uCID
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@@ -1976,6 +2544,7 @@ google.golang.org/genproto v0.0.0-20190404172233-64821d5d2107/go.mod h1:VzzqZJRn
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@@ -1989,6 +2558,7 @@ google.golang.org/genproto v0.0.0-20191216164720-4f79533eabd1/go.mod h1:n3cpQtvx
 google.golang.org/genproto v0.0.0-20191230161307-f3c370f40bfb/go.mod h1:n3cpQtvxv34hfy77yVDNjmbRyujviMdxYliBSkLhpCc=
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@@ -1997,6 +2567,7 @@ google.golang.org/genproto v0.0.0-20200228133532-8c2c7df3a383/go.mod h1:55QSHmfG
 google.golang.org/genproto v0.0.0-20200305110556-506484158171/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
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 google.golang.org/genproto v0.0.0-20200423170343-7949de9c1215/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
 google.golang.org/genproto v0.0.0-20200430143042-b979b6f78d84/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
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@@ -2012,7 +2583,9 @@ google.golang.org/genproto v0.0.0-20200804131852-c06518451d9c/go.mod h1:FWY/as6D
 google.golang.org/genproto v0.0.0-20200815001618-f69a88009b70/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
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 google.golang.org/genproto v0.0.0-20200904004341-0bd0a958aa1d/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
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 google.golang.org/genproto v0.0.0-20201109203340-2640f1f9cdfb/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
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 google.golang.org/genproto v0.0.0-20201201144952-b05cb90ed32e/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
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@@ -2022,38 +2595,25 @@ google.golang.org/genproto v0.0.0-20210310155132-4ce2db91004e/go.mod h1:FWY/as6D
 google.golang.org/genproto v0.0.0-20210312152112-fc591d9ea70f/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
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 k8s.io/klog/v2 v2.5.0/go.mod h1:hy9LJ/NvuK+iVyP4Ehqva4HxZG/oXyIS3n3Jmire4Ec=
-k8s.io/klog/v2 v2.8.0 h1:Q3gmuM9hKEjefWFFYF0Mat+YyFJvsUyYuwyNNJ5C9Ts=
 k8s.io/klog/v2 v2.8.0/go.mod h1:hy9LJ/NvuK+iVyP4Ehqva4HxZG/oXyIS3n3Jmire4Ec=
+k8s.io/klog/v2 v2.9.0/go.mod h1:hy9LJ/NvuK+iVyP4Ehqva4HxZG/oXyIS3n3Jmire4Ec=
+k8s.io/klog/v2 v2.10.0 h1:R2HDMDJsHVTHA2n4RjwbeYXdOcBymXdX/JRb1v0VGhE=
+k8s.io/klog/v2 v2.10.0/go.mod h1:hy9LJ/NvuK+iVyP4Ehqva4HxZG/oXyIS3n3Jmire4Ec=
 k8s.io/kube-openapi v0.0.0-20190709113604-33be087ad058/go.mod h1:nfDlWeOsu3pUf4yWGL+ERqohP4YsZcBJXWMK+gkzOA4=
 k8s.io/kube-openapi v0.0.0-20190722073852-5e22f3d471e6/go.mod h1:RZvgC8MSN6DjiMV6oIfEE9pDL9CYXokkfaCKZeHm3nc=
 k8s.io/kube-openapi v0.0.0-20191107075043-30be4d16710a/go.mod h1:1TqjTSzOxsLGIKfj0lK8EeCP7K1iUG65v09OM0/WG5E=
+k8s.io/kube-openapi v0.0.0-20200316234421-82d701f24f9d/go.mod h1:F+5wygcW0wmRTnM3cOgIqGivxkwSWIWT5YdsDbeAOaU=
 k8s.io/kube-openapi v0.0.0-20200410145947-61e04a5be9a6/go.mod h1:GRQhZsXIAJ1xR0C9bd8UpWHZ5plfAS9fzPjJuQ6JL3E=
 k8s.io/kube-openapi v0.0.0-20200805222855-6aeccd4b50c6/go.mod h1:UuqjUnNftUyPE5H64/qeyjQoUZhGpeFDVdxjTeEVN2o=
 k8s.io/kube-openapi v0.0.0-20201113171705-d219536bb9fd/go.mod h1:WOJ3KddDSol4tAGcJo0Tvi+dK12EcqSLqcWsryKMpfM=
 k8s.io/kube-openapi v0.0.0-20210305001622-591a79e4bda7/go.mod h1:wXW5VT87nVfh/iLV8FpR2uDvrFyomxbtb1KivDbvPTE=
+k8s.io/kube-openapi v0.0.0-20210421082810-95288971da7e/go.mod h1:vHXdDvt9+2spS2Rx9ql3I8tycm3H9FDfdUoIuKCefvw=
+k8s.io/kubernetes v1.13.0/go.mod h1:ocZa8+6APFNC2tX1DZASIbocyYT5jHzqFVsY5aoB7Jk=
 k8s.io/utils v0.0.0-20190809000727-6c36bc71fc4a/go.mod h1:sZAwmy6armz5eXlNoLmJcl4F1QuKu7sr+mFQ0byX7Ew=
 k8s.io/utils v0.0.0-20191114200735-6ca3b61696b6/go.mod h1:sZAwmy6armz5eXlNoLmJcl4F1QuKu7sr+mFQ0byX7Ew=
 k8s.io/utils v0.0.0-20200414100711-2df71ebbae66/go.mod h1:jPW/WVKK9YHAvNhRxK0md/EJ228hCsBRufyofKtW8HA=
@@ -2174,14 +2761,19 @@ rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8
 rsc.io/pdf v0.1.1/go.mod h1:n8OzWcQ6Sp37PL01nO98y4iUCRdTGarVfzxY20ICaU4=
 rsc.io/quote/v3 v3.1.0/go.mod h1:yEA65RcK8LyAZtP9Kv3t0HmxON59tX3rD+tICJqUlj0=
 rsc.io/sampler v1.3.0/go.mod h1:T1hPZKmBbMNahiBKFy5HrXp6adAjACjK9JXDnKaTXpA=
+sigs.k8s.io/apiserver-network-proxy/konnectivity-client v0.0.14/go.mod h1:LEScyzhFmoF5pso/YSeBstl57mOzx9xlU9n85RGrDQg=
+sigs.k8s.io/apiserver-network-proxy/konnectivity-client v0.0.15/go.mod h1:LEScyzhFmoF5pso/YSeBstl57mOzx9xlU9n85RGrDQg=
 sigs.k8s.io/structured-merge-diff v0.0.0-20190525122527-15d366b2352e h1:4Z09Hglb792X0kfOBBJUPFEyvVfQWrYT/l8h5EKA6JQ=
 sigs.k8s.io/structured-merge-diff v0.0.0-20190525122527-15d366b2352e/go.mod h1:wWxsB5ozmmv/SG7nM11ayaAW51xMvak/t1r0CSlcokI=
+sigs.k8s.io/structured-merge-diff/v2 v2.0.1/go.mod h1:Wb7vfKAodbKgf6tn1Kl0VvGj7mRH6DGaRcixXEJXTsE=
 sigs.k8s.io/structured-merge-diff/v3 v3.0.0-20200116222232-67a7b8c61874/go.mod h1:PlARxl6Hbt/+BC80dRLi1qAmnMqwqDg62YvvVkZjemw=
 sigs.k8s.io/structured-merge-diff/v3 v3.0.0/go.mod h1:PlARxl6Hbt/+BC80dRLi1qAmnMqwqDg62YvvVkZjemw=
 sigs.k8s.io/structured-merge-diff/v4 v4.0.1/go.mod h1:bJZC9H9iH24zzfZ/41RGcq60oK1F7G282QMXDPYydCw=
 sigs.k8s.io/structured-merge-diff/v4 v4.0.2/go.mod h1:bJZC9H9iH24zzfZ/41RGcq60oK1F7G282QMXDPYydCw=
-sigs.k8s.io/structured-merge-diff/v4 v4.1.0 h1:C4r9BgJ98vrKnnVCjwCSXcWjWe0NKcUQkmzDXZXGwH8=
+sigs.k8s.io/structured-merge-diff/v4 v4.0.3/go.mod h1:bJZC9H9iH24zzfZ/41RGcq60oK1F7G282QMXDPYydCw=
 sigs.k8s.io/structured-merge-diff/v4 v4.1.0/go.mod h1:bJZC9H9iH24zzfZ/41RGcq60oK1F7G282QMXDPYydCw=
+sigs.k8s.io/structured-merge-diff/v4 v4.1.2 h1:Hr/htKFmJEbtMgS/UD0N+gtgctAqz81t3nu+sPzynno=
+sigs.k8s.io/structured-merge-diff/v4 v4.1.2/go.mod h1:j/nl6xW8vLS49O8YvXW1ocPhZawJtm+Yrr7PPRQ0Vg4=
 sigs.k8s.io/yaml v1.1.0/go.mod h1:UJmg0vDUVViEyp3mgSv9WPwZCDxu4rQW1olrI1uml+o=
 sigs.k8s.io/yaml v1.2.0 h1:kr/MCeFWJWTwyaHoR9c8EjH9OumOmoF9YGiZd7lFm/Q=
 sigs.k8s.io/yaml v1.2.0/go.mod h1:yfXDCHCao9+ENCvLSE62v9VSji2MKu5jeNfTrofGhJc=
diff --git a/integration/alertmanager_test.go b/integration/alertmanager_test.go
index 28ad75f..79a8652 100644
--- a/integration/alertmanager_test.go
+++ b/integration/alertmanager_test.go
@@ -531,6 +531,12 @@ func TestAlertmanagerSharding(t *testing.T) {
 				require.NoError(t, err)
 				err = c3.SendAlertToAlermanager(context.Background(), alert(3, 2))
 				require.NoError(t, err)
+
+				// Wait for the alerts to be received by every replica.
+				require.NoError(t, alertmanagers.WaitSumMetricsWithOptions(
+					e2e.Equals(float64(3*testCfg.replicationFactor)),
+					[]string{"cortex_alertmanager_alerts_received_total"},
+					e2e.SkipMissingMetrics))
 			}
 
 			// Endpoint: GET /v1/alerts
diff --git a/integration/backward_compatibility_test.go b/integration/backward_compatibility_test.go
index 9cf29ed..9a21292 100644
--- a/integration/backward_compatibility_test.go
+++ b/integration/backward_compatibility_test.go
@@ -20,16 +20,17 @@ var (
 	// If you change the image tag, remember to update it in the preloading done
 	// by GitHub Actions too (see .github/workflows/test-build-deploy.yml).
 	previousVersionImages = map[string]func(map[string]string) map[string]string{
-		"quay.io/cortexproject/cortex:v1.0.0": preCortex14Flags,
-		"quay.io/cortexproject/cortex:v1.1.0": preCortex14Flags,
-		"quay.io/cortexproject/cortex:v1.2.0": preCortex14Flags,
-		"quay.io/cortexproject/cortex:v1.3.0": preCortex14Flags,
-		"quay.io/cortexproject/cortex:v1.4.0": preCortex16Flags,
-		"quay.io/cortexproject/cortex:v1.5.0": preCortex16Flags,
-		"quay.io/cortexproject/cortex:v1.6.0": preCortex110Flags,
-		"quay.io/cortexproject/cortex:v1.7.0": preCortex110Flags,
-		"quay.io/cortexproject/cortex:v1.8.0": preCortex110Flags,
-		"quay.io/cortexproject/cortex:v1.9.0": preCortex110Flags,
+		"quay.io/cortexproject/cortex:v1.0.0":  preCortex14Flags,
+		"quay.io/cortexproject/cortex:v1.1.0":  preCortex14Flags,
+		"quay.io/cortexproject/cortex:v1.2.0":  preCortex14Flags,
+		"quay.io/cortexproject/cortex:v1.3.0":  preCortex14Flags,
+		"quay.io/cortexproject/cortex:v1.4.0":  preCortex16Flags,
+		"quay.io/cortexproject/cortex:v1.5.0":  preCortex16Flags,
+		"quay.io/cortexproject/cortex:v1.6.0":  preCortex110Flags,
+		"quay.io/cortexproject/cortex:v1.7.0":  preCortex110Flags,
+		"quay.io/cortexproject/cortex:v1.8.0":  preCortex110Flags,
+		"quay.io/cortexproject/cortex:v1.9.0":  preCortex110Flags,
+		"quay.io/cortexproject/cortex:v1.10.0": nil,
 	}
 )
 
diff --git a/integration/e2e/composite_service.go b/integration/e2e/composite_service.go
index 4b89d45..db840ac 100644
--- a/integration/e2e/composite_service.go
+++ b/integration/e2e/composite_service.go
@@ -5,9 +5,8 @@ import (
 	"fmt"
 	"time"
 
+	"github.com/grafana/dskit/backoff"
 	"github.com/pkg/errors"
-
-	"github.com/cortexproject/cortex/pkg/util"
 )
 
 // CompositeHTTPService abstract an higher-level service composed, under the hood,
@@ -16,13 +15,13 @@ type CompositeHTTPService struct {
 	services []*HTTPService
 
 	// Generic retry backoff.
-	retryBackoff *util.Backoff
+	retryBackoff *backoff.Backoff
 }
 
 func NewCompositeHTTPService(services ...*HTTPService) *CompositeHTTPService {
 	return &CompositeHTTPService{
 		services: services,
-		retryBackoff: util.NewBackoff(context.Background(), util.BackoffConfig{
+		retryBackoff: backoff.New(context.Background(), backoff.Config{
 			MinBackoff: 300 * time.Millisecond,
 			MaxBackoff: 600 * time.Millisecond,
 			MaxRetries: 50, // Sometimes the CI is slow ¯\_(ツ)_/¯
diff --git a/integration/e2e/db/db.go b/integration/e2e/db/db.go
index fe6de79..ed397bb 100644
--- a/integration/e2e/db/db.go
+++ b/integration/e2e/db/db.go
@@ -14,18 +14,22 @@ const (
 )
 
 // NewMinio returns minio server, used as a local replacement for S3.
-func NewMinio(port int, bktName string) *e2e.HTTPService {
+func NewMinio(port int, bktNames ...string) *e2e.HTTPService {
 	minioKESGithubContent := "https://raw.githubusercontent.com/minio/kes/master"
 	commands := []string{
-		"curl -sSL --tlsv1.2 -O '%s/root.key'	-O '%s/root.cert'",
-		"mkdir -p /data/%s && minio server --address :%v --quiet /data",
+		fmt.Sprintf("curl -sSL --tlsv1.2 -O '%s/root.key' -O '%s/root.cert'", minioKESGithubContent, minioKESGithubContent),
 	}
 
+	for _, bkt := range bktNames {
+		commands = append(commands, fmt.Sprintf("mkdir -p /data/%s", bkt))
+	}
+	commands = append(commands, fmt.Sprintf("minio server --address :%v --quiet /data", port))
+
 	m := e2e.NewHTTPService(
 		fmt.Sprintf("minio-%v", port),
 		images.Minio,
 		// Create the "cortex" bucket before starting minio
-		e2e.NewCommandWithoutEntrypoint("sh", "-c", fmt.Sprintf(strings.Join(commands, " && "), minioKESGithubContent, minioKESGithubContent, bktName, port)),
+		e2e.NewCommandWithoutEntrypoint("sh", "-c", strings.Join(commands, " && ")),
 		e2e.NewHTTPReadinessProbe(port, "/minio/health/ready", 200, 200),
 		port,
 	)
diff --git a/integration/e2e/logger.go b/integration/e2e/logger.go
index d4b309a..5152ed5 100644
--- a/integration/e2e/logger.go
+++ b/integration/e2e/logger.go
@@ -7,7 +7,7 @@ import (
 	"strings"
 	"time"
 
-	"github.com/go-kit/kit/log"
+	"github.com/go-kit/log"
 )
 
 // Global logger to use in integration tests. We use a global logger to simplify
diff --git a/integration/e2e/scenario_test.go b/integration/e2e/scenario_test.go
index 2a31e19..a31ed9d 100644
--- a/integration/e2e/scenario_test.go
+++ b/integration/e2e/scenario_test.go
@@ -9,7 +9,7 @@ import (
 	"testing"
 	"time"
 
-	"github.com/go-kit/kit/log"
+	"github.com/go-kit/log"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 	"github.com/thanos-io/thanos/pkg/objstore/s3"
diff --git a/integration/e2e/service.go b/integration/e2e/service.go
index cf1f4d2..cb15a1b 100644
--- a/integration/e2e/service.go
+++ b/integration/e2e/service.go
@@ -12,12 +12,11 @@ import (
 	"strings"
 	"time"
 
-	"github.com/go-kit/kit/log"
+	"github.com/go-kit/log"
+	"github.com/grafana/dskit/backoff"
 	"github.com/pkg/errors"
 	"github.com/prometheus/common/expfmt"
 	"github.com/thanos-io/thanos/pkg/runutil"
-
-	"github.com/cortexproject/cortex/pkg/util"
 )
 
 var (
@@ -43,7 +42,7 @@ type ConcreteService struct {
 	networkPortsContainerToLocal map[int]int
 
 	// Generic retry backoff.
-	retryBackoff *util.Backoff
+	retryBackoff *backoff.Backoff
 
 	// docker NetworkName used to start this container.
 	// If empty it means service is stopped.
@@ -64,7 +63,7 @@ func NewConcreteService(
 		command:                      command,
 		networkPortsContainerToLocal: map[int]int{},
 		readiness:                    readiness,
-		retryBackoff: util.NewBackoff(context.Background(), util.BackoffConfig{
+		retryBackoff: backoff.New(context.Background(), backoff.Config{
 			MinBackoff: 300 * time.Millisecond,
 			MaxBackoff: 600 * time.Millisecond,
 			MaxRetries: 50, // Sometimes the CI is slow ¯\_(ツ)_/¯
@@ -80,8 +79,8 @@ func (s *ConcreteService) Name() string { return s.name }
 
 // Less often used options.
 
-func (s *ConcreteService) SetBackoff(cfg util.BackoffConfig) {
-	s.retryBackoff = util.NewBackoff(context.Background(), cfg)
+func (s *ConcreteService) SetBackoff(cfg backoff.Config) {
+	s.retryBackoff = backoff.New(context.Background(), cfg)
 }
 
 func (s *ConcreteService) SetEnvVars(env map[string]string) {
diff --git a/integration/e2e/service_test.go b/integration/e2e/service_test.go
index 2589cb1..ebd3641 100644
--- a/integration/e2e/service_test.go
+++ b/integration/e2e/service_test.go
@@ -10,10 +10,9 @@ import (
 	"testing"
 	"time"
 
+	"github.com/grafana/dskit/backoff"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
-
-	"github.com/cortexproject/cortex/pkg/util"
 )
 
 func TestWaitSumMetric(t *testing.T) {
@@ -80,7 +79,7 @@ metric_b_summary_count 1
 		},
 	}
 
-	s.SetBackoff(util.BackoffConfig{
+	s.SetBackoff(backoff.Config{
 		MinBackoff: 300 * time.Millisecond,
 		MaxBackoff: 600 * time.Millisecond,
 		MaxRetries: 50,
@@ -88,7 +87,7 @@ metric_b_summary_count 1
 	require.NoError(t, s.WaitSumMetrics(Equals(221), "metric_a"))
 
 	// No retry.
-	s.SetBackoff(util.BackoffConfig{
+	s.SetBackoff(backoff.Config{
 		MinBackoff: 0,
 		MaxBackoff: 0,
 		MaxRetries: 1,
@@ -164,7 +163,7 @@ metric_b 1000
 		},
 	}
 
-	s.SetBackoff(util.BackoffConfig{
+	s.SetBackoff(backoff.Config{
 		MinBackoff: 300 * time.Millisecond,
 		MaxBackoff: 600 * time.Millisecond,
 		MaxRetries: 50,
diff --git a/integration/e2ecortex/client.go b/integration/e2ecortex/client.go
index 4b47849..72fed34 100644
--- a/integration/e2ecortex/client.go
+++ b/integration/e2ecortex/client.go
@@ -318,6 +318,11 @@ func (c *Client) SetRuleGroup(rulegroup rulefmt.RuleGroup, namespace string) err
 	}
 
 	defer res.Body.Close()
+
+	if res.StatusCode != 202 {
+		return fmt.Errorf("unexpected status code: %d", res.StatusCode)
+	}
+
 	return nil
 }
 
diff --git a/integration/e2ecortex/storage.go b/integration/e2ecortex/storage.go
index 2201a9d..f35a084 100644
--- a/integration/e2ecortex/storage.go
+++ b/integration/e2ecortex/storage.go
@@ -5,14 +5,14 @@ import (
 	"fmt"
 	"strings"
 
-	"github.com/go-kit/kit/log"
+	"github.com/go-kit/log"
+	"github.com/grafana/dskit/flagext"
 	"github.com/oklog/ulid"
 	"github.com/thanos-io/thanos/pkg/objstore"
 
 	"github.com/cortexproject/cortex/integration/e2e"
 	e2edb "github.com/cortexproject/cortex/integration/e2e/db"
 	"github.com/cortexproject/cortex/pkg/storage/bucket/s3"
-	"github.com/cortexproject/cortex/pkg/util/flagext"
 )
 
 type S3Client struct {
diff --git a/integration/getting_started_with_gossiped_ring_test.go b/integration/getting_started_with_gossiped_ring_test.go
index 24be49c..90e1792 100644
--- a/integration/getting_started_with_gossiped_ring_test.go
+++ b/integration/getting_started_with_gossiped_ring_test.go
@@ -125,4 +125,10 @@ func TestGettingStartedWithGossipedRing(t *testing.T) {
 	// single ingester and so we have 1 block shipped from ingesters and loaded by both store-gateways.
 	require.NoError(t, cortex1.WaitSumMetrics(e2e.Equals(1), "cortex_bucket_store_blocks_loaded"))
 	require.NoError(t, cortex2.WaitSumMetrics(e2e.Equals(1), "cortex_bucket_store_blocks_loaded"))
+
+	// Make sure that no DNS failures occurred.
+	// No actual DNS lookups are necessarily performed, so we can't really assert on that.
+	mlMatcher := labels.MustNewMatcher(labels.MatchEqual, "name", "memberlist")
+	require.NoError(t, cortex1.WaitSumMetricsWithOptions(e2e.Equals(0), []string{"cortex_dns_failures_total"}, e2e.WithLabelMatchers(mlMatcher)))
+	require.NoError(t, cortex2.WaitSumMetricsWithOptions(e2e.Equals(0), []string{"cortex_dns_failures_total"}, e2e.WithLabelMatchers(mlMatcher)))
 }
diff --git a/integration/integration_memberlist_single_binary_test.go b/integration/integration_memberlist_single_binary_test.go
index 53c1a94..c641fa3 100644
--- a/integration/integration_memberlist_single_binary_test.go
+++ b/integration/integration_memberlist_single_binary_test.go
@@ -11,6 +11,7 @@ import (
 	"testing"
 	"time"
 
+	"github.com/grafana/dskit/backoff"
 	"github.com/stretchr/testify/require"
 	"golang.org/x/sync/errgroup"
 
@@ -18,20 +19,25 @@ import (
 	"github.com/cortexproject/cortex/integration/e2e"
 	e2edb "github.com/cortexproject/cortex/integration/e2e/db"
 	"github.com/cortexproject/cortex/integration/e2ecortex"
-	"github.com/cortexproject/cortex/pkg/util"
 )
 
 func TestSingleBinaryWithMemberlist(t *testing.T) {
 	t.Run("default", func(t *testing.T) {
-		testSingleBinaryEnv(t, false)
+		testSingleBinaryEnv(t, false, nil)
 	})
 
 	t.Run("tls", func(t *testing.T) {
-		testSingleBinaryEnv(t, true)
+		testSingleBinaryEnv(t, true, nil)
+	})
+
+	t.Run("compression-disabled", func(t *testing.T) {
+		testSingleBinaryEnv(t, false, map[string]string{
+			"-memberlist.compression-enabled": "false",
+		})
 	})
 }
 
-func testSingleBinaryEnv(t *testing.T, tlsEnabled bool) {
+func testSingleBinaryEnv(t *testing.T, tlsEnabled bool, flags map[string]string) {
 	s, err := e2e.NewScenario(networkName)
 	require.NoError(t, err)
 	defer s.Close()
@@ -65,13 +71,13 @@ func testSingleBinaryEnv(t *testing.T, tlsEnabled bool) {
 			filepath.Join(s.SharedDir(), clientKeyFile),
 		))
 
-		cortex1 = newSingleBinary("cortex-1", memberlistDNS, "")
-		cortex2 = newSingleBinary("cortex-2", memberlistDNS, networkName+"-cortex-1:8000")
-		cortex3 = newSingleBinary("cortex-3", memberlistDNS, networkName+"-cortex-1:8000")
+		cortex1 = newSingleBinary("cortex-1", memberlistDNS, "", flags)
+		cortex2 = newSingleBinary("cortex-2", memberlistDNS, networkName+"-cortex-1:8000", flags)
+		cortex3 = newSingleBinary("cortex-3", memberlistDNS, networkName+"-cortex-1:8000", flags)
 	} else {
-		cortex1 = newSingleBinary("cortex-1", "", "")
-		cortex2 = newSingleBinary("cortex-2", "", networkName+"-cortex-1:8000")
-		cortex3 = newSingleBinary("cortex-3", "", networkName+"-cortex-1:8000")
+		cortex1 = newSingleBinary("cortex-1", "", "", flags)
+		cortex2 = newSingleBinary("cortex-2", "", networkName+"-cortex-1:8000", flags)
+		cortex3 = newSingleBinary("cortex-3", "", networkName+"-cortex-1:8000", flags)
 	}
 
 	// start cortex-1 first, as cortex-2 and cortex-3 both connect to cortex-1
@@ -109,7 +115,7 @@ func testSingleBinaryEnv(t *testing.T, tlsEnabled bool) {
 	require.NoError(t, s.Stop(cortex3))
 }
 
-func newSingleBinary(name string, servername string, join string) *e2ecortex.CortexService {
+func newSingleBinary(name string, servername string, join string, testFlags map[string]string) *e2ecortex.CortexService {
 	flags := map[string]string{
 		"-ingester.final-sleep":              "0s",
 		"-ingester.join-after":               "0s", // join quickly
@@ -132,13 +138,14 @@ func newSingleBinary(name string, servername string, join string) *e2ecortex.Cor
 		mergeFlags(
 			ChunksStorageFlags(),
 			flags,
+			testFlags,
 			getTLSFlagsWithPrefix("memberlist", servername, servername == ""),
 		),
 		"",
 		8000,
 	)
 
-	backOff := util.BackoffConfig{
+	backOff := backoff.Config{
 		MinBackoff: 200 * time.Millisecond,
 		MaxBackoff: 500 * time.Millisecond, // Bump max backoff... things take little longer with memberlist.
 		MaxRetries: 100,
@@ -170,7 +177,7 @@ func TestSingleBinaryWithMemberlistScaling(t *testing.T) {
 		if i > 0 {
 			join = e2e.NetworkContainerHostPort(networkName, "cortex-1", 8000)
 		}
-		c := newSingleBinary(name, "", join)
+		c := newSingleBinary(name, "", join, nil)
 		require.NoError(t, s.StartAndWaitReady(c))
 		instances = append(instances, c)
 	}
@@ -190,6 +197,13 @@ func TestSingleBinaryWithMemberlistScaling(t *testing.T) {
 		c := instances[i]
 		instances = instances[:i]
 		stop.Go(func() error { return s.Stop(c) })
+
+		// TODO(#4360): Remove this when issue is resolved.
+		//   Wait until memberlist for all nodes has recognised the instance left.
+		//   This means that we will not gossip tombstones to leaving nodes.
+		for _, c := range instances {
+			require.NoError(t, c.WaitSumMetrics(e2e.Equals(float64(len(instances))), "memberlist_client_cluster_members_count"))
+		}
 	}
 	require.NoError(t, stop.Wait())
 
diff --git a/integration/kv_test.go b/integration/kv_test.go
index c72548c..e1d4e5c 100644
--- a/integration/kv_test.go
+++ b/integration/kv_test.go
@@ -1,3 +1,4 @@
+//go:build requires_docker
 // +build requires_docker
 
 package integration
@@ -10,6 +11,10 @@ import (
 	"testing"
 	"time"
 
+	"github.com/go-kit/log"
+	"github.com/grafana/dskit/kv"
+	"github.com/grafana/dskit/kv/consul"
+	"github.com/grafana/dskit/kv/etcd"
 	"github.com/prometheus/client_golang/prometheus"
 	dto "github.com/prometheus/client_model/go"
 	"github.com/stretchr/testify/assert"
@@ -17,9 +22,6 @@ import (
 
 	"github.com/cortexproject/cortex/integration/e2e"
 	e2edb "github.com/cortexproject/cortex/integration/e2e/db"
-	"github.com/cortexproject/cortex/pkg/ring/kv"
-	"github.com/cortexproject/cortex/pkg/ring/kv/consul"
-	"github.com/cortexproject/cortex/pkg/ring/kv/etcd"
 )
 
 func TestKVList(t *testing.T) {
@@ -39,7 +41,7 @@ func TestKVList(t *testing.T) {
 		sort.Strings(keys)
 		require.Equal(t, keysToCreate, keys, "returned key paths did not match created paths")
 
-		verifyClientMetrics(t, reg, map[string]uint64{
+		verifyClientMetricsHistogram(t, reg, "cortex_kv_request_duration_seconds", map[string]uint64{
 			"List": 1,
 			"CAS":  3,
 		})
@@ -63,7 +65,7 @@ func TestKVDelete(t *testing.T) {
 		require.NoError(t, err, "unexpected error")
 		require.Nil(t, v, "object was not deleted")
 
-		verifyClientMetrics(t, reg, map[string]uint64{
+		verifyClientMetricsHistogram(t, reg, "cortex_kv_request_duration_seconds", map[string]uint64{
 			"Delete": 1,
 			"CAS":    1,
 			"GET":    1,
@@ -117,7 +119,9 @@ func TestKVWatchAndDelete(t *testing.T) {
 	})
 }
 
-func setupEtcd(t *testing.T, scenario *e2e.Scenario, reg prometheus.Registerer) kv.Client {
+func setupEtcd(t *testing.T, scenario *e2e.Scenario, reg prometheus.Registerer, logger log.Logger) kv.Client {
+	t.Helper()
+
 	etcdSvc := e2edb.NewETCD()
 	require.NoError(t, scenario.StartAndWaitReady(etcdSvc))
 
@@ -131,13 +135,15 @@ func setupEtcd(t *testing.T, scenario *e2e.Scenario, reg prometheus.Registerer) 
 				MaxRetries:  5,
 			},
 		},
-	}, stringCodec{}, reg)
+	}, stringCodec{}, reg, logger)
 	require.NoError(t, err)
 
 	return etcdKv
 }
 
-func setupConsul(t *testing.T, scenario *e2e.Scenario, reg prometheus.Registerer) kv.Client {
+func setupConsul(t *testing.T, scenario *e2e.Scenario, reg prometheus.Registerer, logger log.Logger) kv.Client {
+	t.Helper()
+
 	consulSvc := e2edb.NewConsul()
 	require.NoError(t, scenario.StartAndWaitReady(consulSvc))
 
@@ -152,14 +158,14 @@ func setupConsul(t *testing.T, scenario *e2e.Scenario, reg prometheus.Registerer
 				WatchKeyRateLimit: 1,
 			},
 		},
-	}, stringCodec{}, reg)
+	}, stringCodec{}, reg, logger)
 	require.NoError(t, err)
 
 	return consulKv
 }
 
 func testKVs(t *testing.T, testFn func(t *testing.T, client kv.Client, reg *prometheus.Registry)) {
-	setupFns := map[string]func(t *testing.T, scenario *e2e.Scenario, reg prometheus.Registerer) kv.Client{
+	setupFns := map[string]func(t *testing.T, scenario *e2e.Scenario, reg prometheus.Registerer, logger log.Logger) kv.Client{
 		"etcd":   setupEtcd,
 		"consul": setupConsul,
 	}
@@ -171,23 +177,30 @@ func testKVs(t *testing.T, testFn func(t *testing.T, client kv.Client, reg *prom
 	}
 }
 
-func testKVScenario(t *testing.T, kvSetupFn func(t *testing.T, scenario *e2e.Scenario, reg prometheus.Registerer) kv.Client, testFn func(t *testing.T, client kv.Client, reg *prometheus.Registry)) {
+func testKVScenario(t *testing.T, kvSetupFn func(t *testing.T, scenario *e2e.Scenario, reg prometheus.Registerer, logger log.Logger) kv.Client, testFn func(t *testing.T, client kv.Client, reg *prometheus.Registry)) {
 	s, err := e2e.NewScenario(networkName)
 	require.NoError(t, err)
 	defer s.Close()
 
 	reg := prometheus.NewRegistry()
-	client := kvSetupFn(t, s, reg)
+	client := kvSetupFn(t, s, prometheus.WrapRegistererWithPrefix("cortex_", reg), log.NewNopLogger())
 	testFn(t, client, reg)
 }
 
-func verifyClientMetrics(t *testing.T, reg *prometheus.Registry, sampleCounts map[string]uint64) {
+func verifyClientMetricsHistogram(t *testing.T, reg *prometheus.Registry, metricNameToVerify string, sampleCounts map[string]uint64) {
 	metrics, err := reg.Gather()
 	require.NoError(t, err)
 
-	require.Len(t, metrics, 1)
-	require.Equal(t, "cortex_kv_request_duration_seconds", metrics[0].GetName())
-	require.Equal(t, dto.MetricType_HISTOGRAM, metrics[0].GetType())
+	var metricToVerify *dto.MetricFamily
+	for _, metric := range metrics {
+		if metric.GetName() != metricNameToVerify {
+			continue
+		}
+		metricToVerify = metric
+		break
+	}
+	require.NotNilf(t, metricToVerify, "Metric %s not found in registry", metricNameToVerify)
+	require.Equal(t, dto.MetricType_HISTOGRAM, metricToVerify.GetType())
 
 	getMetricOperation := func(labels []*dto.LabelPair) (string, error) {
 		for _, l := range labels {
@@ -198,9 +211,8 @@ func verifyClientMetrics(t *testing.T, reg *prometheus.Registry, sampleCounts ma
 		return "", errors.New("no operation")
 	}
 
-	for _, metric := range metrics[0].GetMetric() {
+	for _, metric := range metricToVerify.GetMetric() {
 		op, err := getMetricOperation(metric.Label)
-
 		require.NoErrorf(t, err, "No operation label found in metric %v", metric.String())
 		assert.Equal(t, sampleCounts[op], metric.GetHistogram().GetSampleCount(), op)
 	}
diff --git a/integration/ruler_test.go b/integration/ruler_test.go
index 885f84a..08dec2e 100644
--- a/integration/ruler_test.go
+++ b/integration/ruler_test.go
@@ -523,6 +523,166 @@ func TestRulerAlertmanagerTLS(t *testing.T) {
 	require.NoError(t, ruler.WaitSumMetricsWithOptions(e2e.Equals(1), []string{"cortex_prometheus_notifications_alertmanagers_discovered"}, e2e.WaitMissingMetrics))
 }
 
+func TestRulerMetricsForInvalidQueries(t *testing.T) {
+	s, err := e2e.NewScenario(networkName)
+	require.NoError(t, err)
+	defer s.Close()
+
+	// Start dependencies.
+	consul := e2edb.NewConsul()
+	minio := e2edb.NewMinio(9000, bucketName, rulestoreBucketName)
+	require.NoError(t, s.StartAndWaitReady(consul, minio))
+
+	// Configure the ruler.
+	flags := mergeFlags(
+		BlocksStorageFlags(),
+		RulerFlags(false),
+		map[string]string{
+			// Since we're not going to run any rule (our only rule is invalid), we don't need the
+			// store-gateway to be configured to a valid address.
+			"-querier.store-gateway-addresses": "localhost:12345",
+			// Enable the bucket index so we can skip the initial bucket scan.
+			"-blocks-storage.bucket-store.bucket-index.enabled": "true",
+			// Evaluate rules often, so that we don't need to wait for metrics to show up.
+			"-ruler.evaluation-interval": "2s",
+			"-ruler.poll-interval":       "2s",
+			// No delay
+			"-ruler.evaluation-delay-duration": "0",
+
+			"-blocks-storage.tsdb.block-ranges-period":   "1h",
+			"-blocks-storage.bucket-store.sync-interval": "1s",
+			"-blocks-storage.tsdb.retention-period":      "2h",
+
+			// We run single ingester only, no replication.
+			"-distributor.replication-factor": "1",
+
+			// Very low limit so that ruler hits it.
+			"-querier.max-fetched-chunks-per-query": "5",
+			// We need this to make limit work.
+			"-ingester.stream-chunks-when-using-blocks": "true",
+		},
+	)
+
+	const namespace = "test"
+	const user = "user"
+
+	distributor := e2ecortex.NewDistributor("distributor", consul.NetworkHTTPEndpoint(), flags, "")
+	ruler := e2ecortex.NewRuler("ruler", consul.NetworkHTTPEndpoint(), flags, "")
+	ingester := e2ecortex.NewIngester("ingester", consul.NetworkHTTPEndpoint(), flags, "")
+	require.NoError(t, s.StartAndWaitReady(distributor, ingester, ruler))
+
+	// Wait until both the distributor and ruler have updated the ring. The querier will also watch
+	// the store-gateway ring if blocks sharding is enabled.
+	require.NoError(t, distributor.WaitSumMetrics(e2e.Equals(512), "cortex_ring_tokens_total"))
+	require.NoError(t, ruler.WaitSumMetrics(e2e.Equals(512), "cortex_ring_tokens_total"))
+
+	c, err := e2ecortex.NewClient(distributor.HTTPEndpoint(), "", "", ruler.HTTPEndpoint(), user)
+	require.NoError(t, err)
+
+	// Push some series to Cortex -- enough so that we can hit some limits.
+	for i := 0; i < 10; i++ {
+		series, _ := generateSeries("metric", time.Now(), prompb.Label{Name: "foo", Value: fmt.Sprintf("%d", i)})
+
+		res, err := c.Push(series)
+		require.NoError(t, err)
+		require.Equal(t, 200, res.StatusCode)
+	}
+
+	totalQueries, err := ruler.SumMetrics([]string{"cortex_ruler_queries_total"})
+	require.NoError(t, err)
+
+	// Verify that user-failures don't increase cortex_ruler_queries_failed_total
+	for groupName, expression := range map[string]string{
+		// Syntactically correct expression (passes check in ruler), but failing because of invalid regex. This fails in PromQL engine.
+		"invalid_group": `label_replace(metric, "foo", "$1", "service", "[")`,
+
+		// This one fails in querier code, because of limits.
+		"too_many_chunks_group": `sum(metric)`,
+	} {
+		t.Run(groupName, func(t *testing.T) {
+			require.NoError(t, c.SetRuleGroup(ruleGroupWithRule(groupName, "rule", expression), namespace))
+			m := ruleGroupMatcher(user, namespace, groupName)
+
+			// Wait until ruler has loaded the group.
+			require.NoError(t, ruler.WaitSumMetricsWithOptions(e2e.Equals(1), []string{"cortex_prometheus_rule_group_rules"}, e2e.WithLabelMatchers(m), e2e.WaitMissingMetrics))
+
+			// Wait until rule group has tried to evaluate the rule.
+			require.NoError(t, ruler.WaitSumMetricsWithOptions(e2e.GreaterOrEqual(1), []string{"cortex_prometheus_rule_evaluations_total"}, e2e.WithLabelMatchers(m), e2e.WaitMissingMetrics))
+
+			// Verify that evaluation of the rule failed.
+			require.NoError(t, ruler.WaitSumMetricsWithOptions(e2e.GreaterOrEqual(1), []string{"cortex_prometheus_rule_evaluation_failures_total"}, e2e.WithLabelMatchers(m), e2e.WaitMissingMetrics))
+
+			// But these failures were not reported as "failed queries"
+			sum, err := ruler.SumMetrics([]string{"cortex_ruler_queries_failed_total"})
+			require.NoError(t, err)
+			require.Equal(t, float64(0), sum[0])
+
+			// Delete rule before checkin "cortex_ruler_queries_total", as we want to reuse value for next test.
+			require.NoError(t, c.DeleteRuleGroup(namespace, groupName))
+
+			// Wait until ruler has unloaded the group. We don't use any matcher, so there should be no groups (in fact, metric disappears).
+			require.NoError(t, ruler.WaitSumMetricsWithOptions(e2e.Equals(0), []string{"cortex_prometheus_rule_group_rules"}, e2e.SkipMissingMetrics))
+
+			// Check that cortex_ruler_queries_total went up since last test.
+			newTotalQueries, err := ruler.SumMetrics([]string{"cortex_ruler_queries_total"})
+			require.NoError(t, err)
+			require.Greater(t, newTotalQueries[0], totalQueries[0])
+
+			// Remember totalQueries for next test.
+			totalQueries = newTotalQueries
+		})
+	}
+
+	// Now let's upload a non-failing rule, and make sure that it works.
+	t.Run("real_error", func(t *testing.T) {
+		const groupName = "good_rule"
+		const expression = `sum(metric{foo=~"1|2"})`
+
+		require.NoError(t, c.SetRuleGroup(ruleGroupWithRule(groupName, "rule", expression), namespace))
+		m := ruleGroupMatcher(user, namespace, groupName)
+
+		// Wait until ruler has loaded the group.
+		require.NoError(t, ruler.WaitSumMetricsWithOptions(e2e.Equals(1), []string{"cortex_prometheus_rule_group_rules"}, e2e.WithLabelMatchers(m), e2e.WaitMissingMetrics))
+
+		// Wait until rule group has tried to evaluate the rule, and succeeded.
+		require.NoError(t, ruler.WaitSumMetricsWithOptions(e2e.GreaterOrEqual(1), []string{"cortex_prometheus_rule_evaluations_total"}, e2e.WithLabelMatchers(m), e2e.WaitMissingMetrics))
+		require.NoError(t, ruler.WaitSumMetricsWithOptions(e2e.Equals(0), []string{"cortex_prometheus_rule_evaluation_failures_total"}, e2e.WithLabelMatchers(m), e2e.WaitMissingMetrics))
+
+		// Still no failures.
+		sum, err := ruler.SumMetrics([]string{"cortex_ruler_queries_failed_total"})
+		require.NoError(t, err)
+		require.Equal(t, float64(0), sum[0])
+
+		// Now let's stop ingester, and recheck metrics. This should increase cortex_ruler_queries_failed_total failures.
+		require.NoError(t, s.Stop(ingester))
+
+		// We should start getting "real" failures now.
+		require.NoError(t, ruler.WaitSumMetricsWithOptions(e2e.GreaterOrEqual(1), []string{"cortex_ruler_queries_failed_total"}))
+	})
+}
+
+func ruleGroupMatcher(user, namespace, groupName string) *labels.Matcher {
+	return labels.MustNewMatcher(labels.MatchEqual, "rule_group", fmt.Sprintf("/rules/%s/%s;%s", user, namespace, groupName))
+}
+
+func ruleGroupWithRule(groupName string, ruleName string, expression string) rulefmt.RuleGroup {
+	// Prepare rule group with invalid rule.
+	var recordNode = yaml.Node{}
+	var exprNode = yaml.Node{}
+
+	recordNode.SetString(ruleName)
+	exprNode.SetString(expression)
+
+	return rulefmt.RuleGroup{
+		Name:     groupName,
+		Interval: 10,
+		Rules: []rulefmt.RuleNode{{
+			Record: recordNode,
+			Expr:   exprNode,
+		}},
+	}
+}
+
 func createTestRuleGroup(t *testing.T) rulefmt.RuleGroup {
 	t.Helper()
 
diff --git a/integration/s3_storage_client_test.go b/integration/s3_storage_client_test.go
index 7d27e69..c813037 100644
--- a/integration/s3_storage_client_test.go
+++ b/integration/s3_storage_client_test.go
@@ -9,13 +9,13 @@ import (
 	"net/url"
 	"testing"
 
+	"github.com/grafana/dskit/flagext"
 	"github.com/stretchr/testify/require"
 
 	"github.com/cortexproject/cortex/integration/e2e"
 	e2edb "github.com/cortexproject/cortex/integration/e2e/db"
 	s3 "github.com/cortexproject/cortex/pkg/chunk/aws"
 	cortex_s3 "github.com/cortexproject/cortex/pkg/storage/bucket/s3"
-	"github.com/cortexproject/cortex/pkg/util/flagext"
 )
 
 func TestS3Client(t *testing.T) {
@@ -94,6 +94,11 @@ func TestS3Client(t *testing.T) {
 
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
+			switch tt.name {
+			case "config-with-deprecated-sse", "config-with-sse-s3":
+				t.Skip("TODO: Issue #4543")
+			}
+
 			client, err := s3.NewS3ObjectClient(tt.cfg)
 
 			require.NoError(t, err)
diff --git a/oci/Dockerfile.ubuntu b/oci/Dockerfile.ubuntu
index 35fe633..9fa6f16 100644
--- a/oci/Dockerfile.ubuntu
+++ b/oci/Dockerfile.ubuntu
@@ -1,4 +1,4 @@
-FROM ubuntu:impish AS builder
+FROM ubuntu:jammy AS builder
 
 WORKDIR /src/cortex
 
@@ -34,7 +34,7 @@ RUN set -eux; \
 	cat /src/cortex/manifest-upstream.txt;
 
 # Prepare the final container
-FROM ubuntu:impish
+FROM ubuntu:jammy
 
 ENV TZ UTC
 
@@ -43,9 +43,11 @@ COPY --from=builder /src/cortex/cmd/query-tee/query-tee /usr/local/bin/query-tee
 COPY --from=builder /src/cortex/cmd/blocksconvert/blocksconvert /usr/local/bin/blocksconvert
 COPY --from=builder /src/cortex/LICENSE /LICENSE.cortex
 COPY --from=builder /src/cortex/docs/configuration/*.yaml /etc/cortex/
+# Our own version of /etc/cortex/single-process-config-blocks.yaml
+# We do not want to use an aws backend in our examples
+COPY --from=builder /src/cortex/oci/cortex.yaml /etc/cortex/cortex.yaml
 
 RUN set -eux; \
-	ln -sv /etc/cortex/single-process-config-blocks.yaml /etc/cortex/cortex.yaml; \
 	apt-get update; \
 	DEBIAN_FRONTEND=noninteractive apt full-upgrade -y; \
 	DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
diff --git a/oci/cortex.yaml b/oci/cortex.yaml
 new file mode 100644
index 0000000..93ca539
--- /dev/null
+++ b/oci/cortex.yaml
@@ -0,0 +1,95 @@
+
+# Configuration for running Cortex in single-process mode.
+# This should not be used in production.  It is only for getting started
+# and development.
+
+# Disable the requirement that every request to Cortex has a
+# X-Scope-OrgID header. `fake` will be substituted in instead.
+auth_enabled: false
+
+server:
+  http_listen_port: 9009
+
+  # Configure the server to allow messages up to 100MB.
+  grpc_server_max_recv_msg_size: 104857600
+  grpc_server_max_send_msg_size: 104857600
+  grpc_server_max_concurrent_streams: 1000
+
+distributor:
+  shard_by_all_labels: true
+  pool:
+    health_check_ingesters: true
+
+ingester_client:
+  grpc_client_config:
+    # Configure the client to allow messages up to 100MB.
+    max_recv_msg_size: 104857600
+    max_send_msg_size: 104857600
+    grpc_compression: gzip
+
+ingester:
+  lifecycler:
+    # The address to advertise for this ingester.  Will be autodiscovered by
+    # looking up address on eth0 or en0; can be specified if this fails.
+    # address: 127.0.0.1
+
+    # We want to start immediately and flush on shutdown.
+    join_after: 0
+    min_ready_duration: 0s
+    final_sleep: 0s
+    num_tokens: 512
+
+    # Use an in memory ring store, so we don't need to launch a Consul.
+    ring:
+      kvstore:
+        store: inmemory
+      replication_factor: 1
+
+storage:
+  engine: blocks
+
+blocks_storage:
+  tsdb:
+    dir: /tmp/cortex/tsdb
+
+  bucket_store:
+    sync_dir: /tmp/cortex/tsdb-sync
+
+  # You can choose between local storage and Amazon S3, Google GCS and Azure storage. Each option requires additional configuration
+  # as shown below. All options can be configured via flags as well which might be handy for secret inputs.
+  backend: filesystem # s3, gcs, azure or filesystem are valid options
+#  s3:
+#    bucket_name: cortex
+#    endpoint: s3.dualstack.us-east-1.amazonaws.com
+#    Configure your S3 credentials below.
+#    secret_access_key: "TODO"
+#    access_key_id:     "TODO"
+#  gcs:
+#    bucket_name: cortex
+#    service_account: # if empty or omitted Cortex will use your default service account as per Google's fallback logic
+#  azure:
+#    account_name:
+#    account_key:
+#    container_name:
+#    endpoint_suffix:
+#    max_retries: # Number of retries for recoverable errors (defaults to 20)
+  filesystem:
+    dir: ./data/tsdb
+
+compactor:
+  data_dir: /tmp/cortex/compactor
+  sharding_ring:
+    kvstore:
+      store: inmemory
+
+frontend_worker:
+  match_max_concurrent: true
+
+ruler:
+  enable_api: true
+  enable_sharding: false
+
+ruler_storage:
+  backend: local
+  local:
+    directory: /tmp/cortex/rules
diff --git a/pkg/alertmanager/alertmanager.go b/pkg/alertmanager/alertmanager.go
index fe89550..43fe9e3 100644
--- a/pkg/alertmanager/alertmanager.go
+++ b/pkg/alertmanager/alertmanager.go
@@ -13,8 +13,10 @@ import (
 	"sync"
 	"time"
 
-	"github.com/go-kit/kit/log"
-	"github.com/go-kit/kit/log/level"
+	"github.com/go-kit/log"
+	"github.com/go-kit/log/level"
+	"github.com/grafana/dskit/flagext"
+	"github.com/grafana/dskit/services"
 	"github.com/pkg/errors"
 	"github.com/prometheus/alertmanager/api"
 	"github.com/prometheus/alertmanager/cluster"
@@ -29,6 +31,7 @@ import (
 	"github.com/prometheus/alertmanager/notify/pagerduty"
 	"github.com/prometheus/alertmanager/notify/pushover"
 	"github.com/prometheus/alertmanager/notify/slack"
+	"github.com/prometheus/alertmanager/notify/sns"
 	"github.com/prometheus/alertmanager/notify/victorops"
 	"github.com/prometheus/alertmanager/notify/webhook"
 	"github.com/prometheus/alertmanager/notify/wechat"
@@ -46,9 +49,7 @@ import (
 	"golang.org/x/time/rate"
 
 	"github.com/cortexproject/cortex/pkg/alertmanager/alertstore"
-	"github.com/cortexproject/cortex/pkg/util/flagext"
 	util_net "github.com/cortexproject/cortex/pkg/util/net"
-	"github.com/cortexproject/cortex/pkg/util/services"
 )
 
 const (
@@ -194,7 +195,7 @@ func New(cfg *Config, reg *prometheus.Registry) (*Alertmanager, error) {
 	am.nflog, err = nflog.New(
 		nflog.WithRetention(cfg.Retention),
 		nflog.WithSnapshot(filepath.Join(cfg.TenantDataDir, notificationLogSnapshot)),
-		nflog.WithMaintenance(maintenancePeriod, am.stop, am.wg.Done),
+		nflog.WithMaintenance(maintenancePeriod, am.stop, am.wg.Done, nil),
 		nflog.WithMetrics(am.registry),
 		nflog.WithLogger(log.With(am.logger, "component", "nflog")),
 	)
@@ -238,7 +239,7 @@ func New(cfg *Config, reg *prometheus.Registry) (*Alertmanager, error) {
 
 	am.wg.Add(1)
 	go func() {
-		am.silences.Maintenance(maintenancePeriod, silencesFile, am.stop)
+		am.silences.Maintenance(maintenancePeriod, silencesFile, am.stop, nil)
 		am.wg.Done()
 	}()
 
@@ -515,6 +516,9 @@ func buildReceiverIntegrations(nc *config.Receiver, tmpl *template.Template, fir
 	for i, c := range nc.PushoverConfigs {
 		add("pushover", i, c, func(l log.Logger) (notify.Notifier, error) { return pushover.New(c, tmpl, l, httpOps...) })
 	}
+	for i, c := range nc.SNSConfigs {
+		add("sns", i, c, func(l log.Logger) (notify.Notifier, error) { return sns.New(c, tmpl, l, httpOps...) })
+	}
 	// If we add support for more integrations, we need to add them to validation as well. See validation.allowedIntegrationNames field.
 	if errs.Len() > 0 {
 		return nil, &errs
diff --git a/pkg/alertmanager/alertmanager_client.go b/pkg/alertmanager/alertmanager_client.go
index 963b531..e95d870 100644
--- a/pkg/alertmanager/alertmanager_client.go
+++ b/pkg/alertmanager/alertmanager_client.go
@@ -4,7 +4,7 @@ import (
 	"flag"
 	"time"
 
-	"github.com/go-kit/kit/log"
+	"github.com/go-kit/log"
 	"github.com/pkg/errors"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/client_golang/prometheus/promauto"
diff --git a/pkg/alertmanager/alertmanager_http.go b/pkg/alertmanager/alertmanager_http.go
index f0afeb2..01f34db 100644
--- a/pkg/alertmanager/alertmanager_http.go
+++ b/pkg/alertmanager/alertmanager_http.go
@@ -4,10 +4,10 @@ import (
 	"net/http"
 	"text/template"
 
-	"github.com/go-kit/kit/log/level"
+	"github.com/go-kit/log/level"
+	"github.com/grafana/dskit/services"
 
 	util_log "github.com/cortexproject/cortex/pkg/util/log"
-	"github.com/cortexproject/cortex/pkg/util/services"
 )
 
 var (
diff --git a/pkg/alertmanager/alertmanager_http_test.go b/pkg/alertmanager/alertmanager_http_test.go
index b2e40b8..209ba33 100644
--- a/pkg/alertmanager/alertmanager_http_test.go
+++ b/pkg/alertmanager/alertmanager_http_test.go
@@ -7,7 +7,7 @@ import (
 	"testing"
 	"time"
 
-	"github.com/go-kit/kit/log"
+	"github.com/go-kit/log"
 	"github.com/prometheus/alertmanager/cluster"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/stretchr/testify/require"
@@ -32,6 +32,7 @@ func TestMultitenantAlertmanager_GetStatusHandler(t *testing.T) {
 				cluster.DefaultTcpTimeout,
 				cluster.DefaultProbeTimeout,
 				cluster.DefaultProbeInterval,
+				nil,
 			)
 		}
 
diff --git a/pkg/alertmanager/alertmanager_ring.go b/pkg/alertmanager/alertmanager_ring.go
index 04d08d2..57b3000 100644
--- a/pkg/alertmanager/alertmanager_ring.go
+++ b/pkg/alertmanager/alertmanager_ring.go
@@ -6,11 +6,11 @@ import (
 	"os"
 	"time"
 
-	"github.com/go-kit/kit/log/level"
+	"github.com/go-kit/log/level"
+	"github.com/grafana/dskit/flagext"
+	"github.com/grafana/dskit/kv"
 
 	"github.com/cortexproject/cortex/pkg/ring"
-	"github.com/cortexproject/cortex/pkg/ring/kv"
-	"github.com/cortexproject/cortex/pkg/util/flagext"
 	util_log "github.com/cortexproject/cortex/pkg/util/log"
 )
 
@@ -76,8 +76,8 @@ func (cfg *RingConfig) RegisterFlags(f *flag.FlagSet) {
 
 	// Ring flags
 	cfg.KVStore.RegisterFlagsWithPrefix(rfprefix, "alertmanagers/", f)
-	f.DurationVar(&cfg.HeartbeatPeriod, rfprefix+"heartbeat-period", 15*time.Second, "Period at which to heartbeat to the ring.")
-	f.DurationVar(&cfg.HeartbeatTimeout, rfprefix+"heartbeat-timeout", time.Minute, "The heartbeat timeout after which alertmanagers are considered unhealthy within the ring.")
+	f.DurationVar(&cfg.HeartbeatPeriod, rfprefix+"heartbeat-period", 15*time.Second, "Period at which to heartbeat to the ring. 0 = disabled.")
+	f.DurationVar(&cfg.HeartbeatTimeout, rfprefix+"heartbeat-timeout", time.Minute, "The heartbeat timeout after which alertmanagers are considered unhealthy within the ring. 0 = never (timeout disabled).")
 	f.IntVar(&cfg.ReplicationFactor, rfprefix+"replication-factor", 3, "The replication factor to use when sharding the alertmanager.")
 	f.BoolVar(&cfg.ZoneAwarenessEnabled, rfprefix+"zone-awareness-enabled", false, "True to enable zone-awareness and replicate alerts across different availability zones.")
 
diff --git a/pkg/alertmanager/alertmanager_test.go b/pkg/alertmanager/alertmanager_test.go
index 402ec2e..23a309f 100644
--- a/pkg/alertmanager/alertmanager_test.go
+++ b/pkg/alertmanager/alertmanager_test.go
@@ -7,7 +7,7 @@ import (
 	"testing"
 	"time"
 
-	"github.com/go-kit/kit/log"
+	"github.com/go-kit/log"
 	"github.com/prometheus/alertmanager/config"
 	"github.com/prometheus/alertmanager/types"
 	"github.com/prometheus/client_golang/prometheus"
diff --git a/pkg/alertmanager/alertstore/bucketclient/bucket_client.go b/pkg/alertmanager/alertstore/bucketclient/bucket_client.go
index a8822d5..cab4fe7 100644
--- a/pkg/alertmanager/alertstore/bucketclient/bucket_client.go
+++ b/pkg/alertmanager/alertstore/bucketclient/bucket_client.go
@@ -7,7 +7,7 @@ import (
 	"strings"
 	"sync"
 
-	"github.com/go-kit/kit/log"
+	"github.com/go-kit/log"
 	"github.com/gogo/protobuf/proto"
 	"github.com/pkg/errors"
 	"github.com/thanos-io/thanos/pkg/objstore"
diff --git a/pkg/alertmanager/alertstore/objectclient/store.go b/pkg/alertmanager/alertstore/objectclient/store.go
index 7812806..ceab6bb 100644
--- a/pkg/alertmanager/alertstore/objectclient/store.go
+++ b/pkg/alertmanager/alertstore/objectclient/store.go
@@ -8,7 +8,7 @@ import (
 	"strings"
 	"sync"
 
-	"github.com/go-kit/kit/log"
+	"github.com/go-kit/log"
 	"github.com/pkg/errors"
 	"github.com/thanos-io/thanos/pkg/runutil"
 
diff --git a/pkg/alertmanager/alertstore/store.go b/pkg/alertmanager/alertstore/store.go
index 12bba96..7a713d0 100644
--- a/pkg/alertmanager/alertstore/store.go
+++ b/pkg/alertmanager/alertstore/store.go
@@ -4,7 +4,7 @@ import (
 	"context"
 	"fmt"
 
-	"github.com/go-kit/kit/log"
+	"github.com/go-kit/log"
 	"github.com/prometheus/client_golang/prometheus"
 
 	"github.com/cortexproject/cortex/pkg/alertmanager/alertspb"
diff --git a/pkg/alertmanager/alertstore/store_test.go b/pkg/alertmanager/alertstore/store_test.go
index 2c87005..12016a1 100644
--- a/pkg/alertmanager/alertstore/store_test.go
+++ b/pkg/alertmanager/alertstore/store_test.go
@@ -5,7 +5,7 @@ import (
 	"errors"
 	"testing"
 
-	"github.com/go-kit/kit/log"
+	"github.com/go-kit/log"
 	"github.com/prometheus/alertmanager/cluster/clusterpb"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
diff --git a/pkg/alertmanager/api.go b/pkg/alertmanager/api.go
index 9d1ee0d..385d3e2 100644
--- a/pkg/alertmanager/api.go
+++ b/pkg/alertmanager/api.go
@@ -16,8 +16,8 @@ import (
 	"github.com/cortexproject/cortex/pkg/util/concurrency"
 	util_log "github.com/cortexproject/cortex/pkg/util/log"
 
-	"github.com/go-kit/kit/log"
-	"github.com/go-kit/kit/log/level"
+	"github.com/go-kit/log"
+	"github.com/go-kit/log/level"
 	"github.com/pkg/errors"
 	"github.com/prometheus/alertmanager/config"
 	"github.com/prometheus/alertmanager/template"
diff --git a/pkg/alertmanager/api_test.go b/pkg/alertmanager/api_test.go
index 511a7f4..494120d 100644
--- a/pkg/alertmanager/api_test.go
+++ b/pkg/alertmanager/api_test.go
@@ -9,26 +9,23 @@ import (
 	"net/http/httptest"
 	"testing"
 
-	"github.com/go-kit/kit/log"
+	"github.com/go-kit/log"
 	"github.com/gorilla/mux"
-	"github.com/prometheus/client_golang/prometheus"
-	"gopkg.in/yaml.v2"
-
+	"github.com/grafana/dskit/flagext"
+	"github.com/grafana/dskit/services"
 	"github.com/pkg/errors"
 	"github.com/prometheus/alertmanager/config"
+	"github.com/prometheus/client_golang/prometheus"
 	commoncfg "github.com/prometheus/common/config"
 	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
 	"github.com/thanos-io/thanos/pkg/objstore"
-
-	"github.com/cortexproject/cortex/pkg/util/flagext"
+	"github.com/weaveworks/common/user"
+	"gopkg.in/yaml.v2"
 
 	"github.com/cortexproject/cortex/pkg/alertmanager/alertspb"
 	"github.com/cortexproject/cortex/pkg/alertmanager/alertstore/bucketclient"
 	util_log "github.com/cortexproject/cortex/pkg/util/log"
-	"github.com/cortexproject/cortex/pkg/util/services"
-
-	"github.com/stretchr/testify/require"
-	"github.com/weaveworks/common/user"
 )
 
 func TestAMConfigValidationAPI(t *testing.T) {
diff --git a/pkg/alertmanager/distributor.go b/pkg/alertmanager/distributor.go
index 2dcfc36..5311216 100644
--- a/pkg/alertmanager/distributor.go
+++ b/pkg/alertmanager/distributor.go
@@ -10,8 +10,9 @@ import (
 	"strings"
 	"sync"
 
-	"github.com/go-kit/kit/log"
-	"github.com/go-kit/kit/log/level"
+	"github.com/go-kit/log"
+	"github.com/go-kit/log/level"
+	"github.com/grafana/dskit/services"
 	"github.com/opentracing/opentracing-go"
 	"github.com/pkg/errors"
 	"github.com/prometheus/client_golang/prometheus"
@@ -24,7 +25,6 @@ import (
 	"github.com/cortexproject/cortex/pkg/tenant"
 	"github.com/cortexproject/cortex/pkg/util"
 	util_log "github.com/cortexproject/cortex/pkg/util/log"
-	"github.com/cortexproject/cortex/pkg/util/services"
 )
 
 // Distributor forwards requests to individual alertmanagers.
diff --git a/pkg/alertmanager/distributor_test.go b/pkg/alertmanager/distributor_test.go
index ad69b85..6dafc36 100644
--- a/pkg/alertmanager/distributor_test.go
+++ b/pkg/alertmanager/distributor_test.go
@@ -13,21 +13,23 @@ import (
 	"testing"
 	"time"
 
-	"github.com/cortexproject/cortex/pkg/alertmanager/alertmanagerpb"
-	"github.com/cortexproject/cortex/pkg/ring"
-	"github.com/cortexproject/cortex/pkg/ring/kv"
-	"github.com/cortexproject/cortex/pkg/ring/kv/consul"
-	"github.com/cortexproject/cortex/pkg/util/flagext"
-	util_log "github.com/cortexproject/cortex/pkg/util/log"
-	"github.com/cortexproject/cortex/pkg/util/services"
-	"github.com/cortexproject/cortex/pkg/util/test"
-
+	"github.com/go-kit/log"
+	"github.com/grafana/dskit/flagext"
+	"github.com/grafana/dskit/kv"
+	"github.com/grafana/dskit/kv/consul"
+	"github.com/grafana/dskit/services"
 	"github.com/prometheus/client_golang/prometheus"
+	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 	"github.com/weaveworks/common/httpgrpc"
 	"github.com/weaveworks/common/user"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/health/grpc_health_v1"
+
+	"github.com/cortexproject/cortex/pkg/alertmanager/alertmanagerpb"
+	"github.com/cortexproject/cortex/pkg/ring"
+	util_log "github.com/cortexproject/cortex/pkg/util/log"
+	"github.com/cortexproject/cortex/pkg/util/test"
 )
 
 func TestDistributor_DistributeRequest(t *testing.T) {
@@ -335,7 +337,9 @@ func prepare(t *testing.T, numAM, numHappyAM, replicationFactor int, responseBod
 		amByAddr[a.myAddr] = ams[i]
 	}
 
-	kvStore := consul.NewInMemoryClient(ring.GetCodec())
+	kvStore, closer := consul.NewInMemoryClient(ring.GetCodec(), log.NewNopLogger(), nil)
+	t.Cleanup(func() { assert.NoError(t, closer.Close()) })
+
 	err := kvStore.CAS(context.Background(), RingKey,
 		func(_ interface{}) (interface{}, bool, error) {
 			return &ring.Desc{
diff --git a/pkg/alertmanager/multitenant.go b/pkg/alertmanager/multitenant.go
index 096f9f2..d42b5a8 100644
--- a/pkg/alertmanager/multitenant.go
+++ b/pkg/alertmanager/multitenant.go
@@ -13,8 +13,11 @@ import (
 	"sync"
 	"time"
 
-	"github.com/go-kit/kit/log"
-	"github.com/go-kit/kit/log/level"
+	"github.com/go-kit/log"
+	"github.com/go-kit/log/level"
+	"github.com/grafana/dskit/flagext"
+	"github.com/grafana/dskit/kv"
+	"github.com/grafana/dskit/services"
 	"github.com/pkg/errors"
 	"github.com/prometheus/alertmanager/cluster"
 	"github.com/prometheus/alertmanager/cluster/clusterpb"
@@ -32,13 +35,10 @@ import (
 	"github.com/cortexproject/cortex/pkg/alertmanager/alertstore"
 	"github.com/cortexproject/cortex/pkg/ring"
 	"github.com/cortexproject/cortex/pkg/ring/client"
-	"github.com/cortexproject/cortex/pkg/ring/kv"
 	"github.com/cortexproject/cortex/pkg/tenant"
 	"github.com/cortexproject/cortex/pkg/util"
 	"github.com/cortexproject/cortex/pkg/util/concurrency"
-	"github.com/cortexproject/cortex/pkg/util/flagext"
 	util_log "github.com/cortexproject/cortex/pkg/util/log"
-	"github.com/cortexproject/cortex/pkg/util/services"
 )
 
 const (
@@ -250,6 +250,10 @@ type MultitenantAlertmanager struct {
 	distributor    *Distributor
 	grpcServer     *server.Server
 
+	// Last ring state. This variable is not protected with a mutex because it's always
+	// accessed by a single goroutine at a time.
+	ringLastState ring.ReplicationSet
+
 	// Subservices manager (ring, lifecycler)
 	subservices        *services.Manager
 	subservicesWatcher *services.FailureWatcher
@@ -322,6 +326,7 @@ func NewMultitenantAlertmanager(cfg *MultitenantAlertmanagerConfig, store alerts
 			cluster.DefaultTcpTimeout,
 			cluster.DefaultProbeTimeout,
 			cluster.DefaultProbeInterval,
+			nil,
 		)
 		if err != nil {
 			return nil, errors.Wrap(err, "unable to initialize gossip mesh")
@@ -340,7 +345,8 @@ func NewMultitenantAlertmanager(cfg *MultitenantAlertmanagerConfig, store alerts
 		ringStore, err = kv.NewClient(
 			cfg.ShardingRing.KVStore,
 			ring.GetCodec(),
-			kv.RegistererWithKVName(registerer, "alertmanager"),
+			kv.RegistererWithKVName(prometheus.WrapRegistererWithPrefix("cortex_", registerer), "alertmanager"),
+			logger,
 		)
 		if err != nil {
 			return nil, errors.Wrap(err, "create KV store client")
@@ -488,6 +494,10 @@ func (am *MultitenantAlertmanager) starting(ctx context.Context) (err error) {
 	}
 
 	if am.cfg.ShardingEnabled {
+		// Store the ring state after the initial Alertmanager configs sync has been done and before we do change
+		// our state in the ring.
+		am.ringLastState, _ = am.ring.GetAllHealthy(RingOp)
+
 		// Make sure that all the alertmanagers we were initially configured with have
 		// fetched state from the replicas, before advertising as ACTIVE. This will
 		// reduce the possibility that we lose state when new instances join/leave.
@@ -631,10 +641,8 @@ func (am *MultitenantAlertmanager) run(ctx context.Context) error {
 	defer tick.Stop()
 
 	var ringTickerChan <-chan time.Time
-	var ringLastState ring.ReplicationSet
 
 	if am.cfg.ShardingEnabled {
-		ringLastState, _ = am.ring.GetAllHealthy(RingOp)
 		ringTicker := time.NewTicker(util.DurationWithJitter(am.cfg.ShardingRing.RingCheckPeriod, 0.2))
 		defer ringTicker.Stop()
 		ringTickerChan = ringTicker.C
@@ -656,8 +664,8 @@ func (am *MultitenantAlertmanager) run(ctx context.Context) error {
 			// replication set which we use to compare with the previous state.
 			currRingState, _ := am.ring.GetAllHealthy(RingOp)
 
-			if ring.HasReplicationSetChanged(ringLastState, currRingState) {
-				ringLastState = currRingState
+			if ring.HasReplicationSetChanged(am.ringLastState, currRingState) {
+				am.ringLastState = currRingState
 				if err := am.loadAndSyncConfigs(ctx, reasonRingChange); err != nil {
 					level.Warn(am.logger).Log("msg", "error while synchronizing alertmanager configs", "err", err)
 				}
diff --git a/pkg/alertmanager/multitenant_test.go b/pkg/alertmanager/multitenant_test.go
index dc60301..ba1ddc7 100644
--- a/pkg/alertmanager/multitenant_test.go
+++ b/pkg/alertmanager/multitenant_test.go
@@ -19,7 +19,10 @@ import (
 	"testing"
 	"time"
 
-	"github.com/go-kit/kit/log"
+	"github.com/go-kit/log"
+	"github.com/grafana/dskit/flagext"
+	"github.com/grafana/dskit/kv/consul"
+	"github.com/grafana/dskit/services"
 	"github.com/prometheus/alertmanager/cluster/clusterpb"
 	"github.com/prometheus/alertmanager/notify"
 	"github.com/prometheus/alertmanager/pkg/labels"
@@ -41,12 +44,9 @@ import (
 	"github.com/cortexproject/cortex/pkg/alertmanager/alertstore"
 	"github.com/cortexproject/cortex/pkg/alertmanager/alertstore/bucketclient"
 	"github.com/cortexproject/cortex/pkg/ring"
-	"github.com/cortexproject/cortex/pkg/ring/kv/consul"
 	"github.com/cortexproject/cortex/pkg/storage/bucket"
 	"github.com/cortexproject/cortex/pkg/util"
 	"github.com/cortexproject/cortex/pkg/util/concurrency"
-	"github.com/cortexproject/cortex/pkg/util/flagext"
-	"github.com/cortexproject/cortex/pkg/util/services"
 	"github.com/cortexproject/cortex/pkg/util/test"
 	"github.com/cortexproject/cortex/pkg/util/validation"
 )
@@ -611,7 +611,9 @@ func TestMultitenantAlertmanager_deleteUnusedLocalUserState(t *testing.T) {
 func TestMultitenantAlertmanager_zoneAwareSharding(t *testing.T) {
 	ctx := context.Background()
 	alertStore := prepareInMemoryAlertStore()
-	ringStore := consul.NewInMemoryClient(ring.GetCodec())
+	ringStore, closer := consul.NewInMemoryClient(ring.GetCodec(), log.NewNopLogger(), nil)
+	t.Cleanup(func() { assert.NoError(t, closer.Close()) })
+
 	const (
 		user1 = "user1"
 		user2 = "user2"
@@ -689,7 +691,8 @@ func TestMultitenantAlertmanager_deleteUnusedRemoteUserState(t *testing.T) {
 	)
 
 	alertStore := prepareInMemoryAlertStore()
-	ringStore := consul.NewInMemoryClient(ring.GetCodec())
+	ringStore, closer := consul.NewInMemoryClient(ring.GetCodec(), log.NewNopLogger(), nil)
+	t.Cleanup(func() { assert.NoError(t, closer.Close()) })
 
 	createInstance := func(i int) *MultitenantAlertmanager {
 		reg := prometheus.NewPedanticRegistry()
@@ -1005,7 +1008,8 @@ func TestMultitenantAlertmanager_InitialSyncWithSharding(t *testing.T) {
 			ctx := context.Background()
 			amConfig := mockAlertmanagerConfig(t)
 			amConfig.ShardingEnabled = true
-			ringStore := consul.NewInMemoryClient(ring.GetCodec())
+			ringStore, closer := consul.NewInMemoryClient(ring.GetCodec(), log.NewNopLogger(), nil)
+			t.Cleanup(func() { assert.NoError(t, closer.Close()) })
 
 			// Use an alert store with a mocked backend.
 			bkt := &bucket.ClientMock{}
@@ -1109,7 +1113,9 @@ func TestMultitenantAlertmanager_PerTenantSharding(t *testing.T) {
 	for _, tt := range tc {
 		t.Run(tt.name, func(t *testing.T) {
 			ctx := context.Background()
-			ringStore := consul.NewInMemoryClient(ring.GetCodec())
+			ringStore, closer := consul.NewInMemoryClient(ring.GetCodec(), log.NewNopLogger(), nil)
+			t.Cleanup(func() { assert.NoError(t, closer.Close()) })
+
 			alertStore := prepareInMemoryAlertStore()
 
 			var instances []*MultitenantAlertmanager
@@ -1296,7 +1302,9 @@ func TestMultitenantAlertmanager_SyncOnRingTopologyChanges(t *testing.T) {
 			amConfig.ShardingRing.RingCheckPeriod = 100 * time.Millisecond
 			amConfig.PollInterval = time.Hour // Don't trigger the periodic check.
 
-			ringStore := consul.NewInMemoryClient(ring.GetCodec())
+			ringStore, closer := consul.NewInMemoryClient(ring.GetCodec(), log.NewNopLogger(), nil)
+			t.Cleanup(func() { assert.NoError(t, closer.Close()) })
+
 			alertStore := prepareInMemoryAlertStore()
 
 			reg := prometheus.NewPedanticRegistry()
@@ -1325,18 +1333,15 @@ func TestMultitenantAlertmanager_SyncOnRingTopologyChanges(t *testing.T) {
 				return ringDesc, true, nil
 			}))
 
-			// Assert if we expected a sync or not.
+			// Assert if we expected an additional sync or not.
+			expectedSyncs := 1
 			if tt.expected {
-				test.Poll(t, time.Second, float64(2), func() interface{} {
-					metrics := regs.BuildMetricFamiliesPerUser()
-					return metrics.GetSumOfCounters("cortex_alertmanager_sync_configs_total")
-				})
-			} else {
-				time.Sleep(250 * time.Millisecond)
-
-				metrics := regs.BuildMetricFamiliesPerUser()