Merge ~ubuntu-docker-images/ubuntu-docker-images/+git/memcached:1.6-21.10-wip into ~ubuntu-docker-images/ubuntu-docker-images/+git/memcached:1.6-21.04

[Athos Ribeiro]

This change creates the memcached OCI image for impish.

Just the trivial changes were needed and no regressions were detected when running the unit test.

Note that this MP is targeting the 1.6-21.04 branch solely for comparing purposes. When accepted, these changes should be pushed into a new 1.6-21.10 branch.

[Sergio Durigan Junior (sergiodj)]

Thanks, builds and tests fine. LGTM.

review: Approve

[Athos Ribeiro (athos-ribeiro)]

Created new 1.6-21.10 branch and removed the wip one.

diff --git a/Dockerfile b/Dockerfile
index 34d9d00..d12137f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:hirsute
+FROM ubuntu:impish
 
 ENV TZ UTC
 
diff --git a/HACKING.md b/HACKING.md
index 08bccc6..52432ab 100644
--- a/HACKING.md
+++ b/HACKING.md
@@ -1,7 +1,7 @@
 # Contributing
 
 In Ubuntu, Memcached is available as a `.deb` package.  For this reason,
-this image was built by installing the Memcached Ubuntu 21.04 package
+this image was built by installing the Memcached Ubuntu 21.10 package
 inside a docker container.
 
 In order to contribute to the Memcached OCI image, do the following:
diff --git a/README.md b/README.md
index 1616930..34a90c5 100644
--- a/README.md
+++ b/README.md
@@ -19,7 +19,7 @@ _Tags in italics are not available in ubuntu/memcached but are shown here for co
 
 | Channel Tag | | | Currently | Architectures |
 |---|---|---|---|---|
-| **`1.6-21.04_beta`**    | | | Memcached 1.6.9 on Ubuntu 21.04 | `amd64`, `arm64`, `ppc64el`, `s390x` |
+| **`1.6-21.10_beta`**    | | | Memcached 1.6.9 on Ubuntu 21.10 | `amd64`, `arm64`, `ppc64el`, `s390x` |
 | _`track_risk`_ |
 
 Channel tag shows the most stable channel for that track ordered `stable`, `candidate`, `beta`, `edge`. More risky channels are always implicitly available. So if `beta` is listed, you can also pull `edge`. If `candidate` is listed, you can pull `beta` and `edge`. When `stable` is listed, all four are available. Images are guaranteed to progress through the sequence `edge`, `beta`, `candidate` before `stable`.
@@ -30,7 +30,7 @@ Channel tag shows the most stable channel for that track ordered `stable`, `cand
 Launch this image locally:
 
 ```sh
-docker run -d --name memcached-container -e TZ=UTC  ubuntu/memcached:1.6-21.04_beta
+docker run -d --name memcached-container -e TZ=UTC  ubuntu/memcached:1.6-21.10_beta
 ```
 
 #### Parameters
@@ -95,7 +95,7 @@ In this case you can append the flags themselves or a shell script to the run co
 Works with any Kubernetes; if you don't have one, we recommend you [install MicroK8s](https://microk8s.io/) and `microk8s.enable dns storage` then `snap alias microk8s.kubectl kubectl`.
 
 Download
-[memcached-deployment.yml](https://git.launchpad.net/~canonical-server/ubuntu-docker-images/+git/memcached/plain/examples/memcached-deployment.yml) and set `containers.memcached.image` in `memcached-deployment.yml` to your chosen channel tag (e.g. `ubuntu/memcached:1.6-21.04_beta`), then:
+[memcached-deployment.yml](https://git.launchpad.net/~canonical-server/ubuntu-docker-images/+git/memcached/plain/examples/memcached-deployment.yml) and set `containers.memcached.image` in `memcached-deployment.yml` to your chosen channel tag (e.g. `ubuntu/memcached:1.6-21.10_beta`), then:
 
 ```sh
 kubectl apply -f memcached-deployment.yml
diff --git a/data/memcached.yaml b/data/memcached.yaml
index 051afdc..01afa20 100644
--- a/data/memcached.yaml
+++ b/data/memcached.yaml
@@ -5,7 +5,7 @@ description: >
   Memcached is an in-memory key-value store for small chunks of arbitrary data (strings, objects) from results of database calls, API calls, or page rendering. It is a short-term memory for applications.
   Memcached allows to take memory from parts of a system where you have more than you need and make it accessible to areas where you have less than you need. Read more on the [memcached website](https://memcached.org/).
 version: 1.6.9
-base: Ubuntu 21.04
+base: Ubuntu 21.10
 architectures:
   - amd64
   - arm64