Merge ~ubuntu-docker-images/ubuntu-docker-images/+git/templates:prometheus into ~ubuntu-docker-images/ubuntu-docker-images/+git/templates:master

[Sergio Durigan Junior]

Prometheus data (needed to generate the README file) and the corresponding prometheus.md (generated from the data).

[Valentin Viennot (valentinviennot)]

review: Approve

diff --git a/data/prometheus.yaml b/data/prometheus.yaml
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index 0000000..a7bd71c
--- /dev/null
+++ b/data/prometheus.yaml
@@ -0,0 +1,42 @@
+application: Prometheus
+repo: prometheus
+description: >
+  Prometheus is a systems and service monitoring system. It collects metrics from configured targets at given intervals, evaluates rule expressions, displays the results, and can trigger alerts if some condition is observed to be true. Read more on the [Prometheus website](https://prometheus.io/).
+version: 2.20.1
+base: Ubuntu 20.04 LTS
+architectures:
+  - amd64
+  - arm64
+  - ppc64el
+  - s390x
+docker:
+  parameters:
+    - -p 30090:9090
+  access: Access your Prometheus server at `localhost:30090`.
+parameters:
+  - type: -e
+    value: TZ=UTC
+    description: Timezone.
+  - type: -p
+    value: 30090:9090
+    description: Expose Prometheus server on `localhost:30090`.
+  - type: -v
+    value: /path/to/prometheus.yml:/etc/prometheus/prometheus.yml
+    description: Local [configuration file](https://prometheus.io/docs/prometheus/2.20/configuration/configuration/) `prometheus.yml` (try [this example](https://git.launchpad.net/~canonical-server/ubuntu-docker-images/+git/prometheus/plain/oci/examples/config/prometheus.yml)).
+  - type: -v
+    value: /path/to/alerts.yml:/etc/prometheus/alerts.yml
+    description: Local [alert configuration file](https://prometheus.io/docs/prometheus/2.20/configuration/configuration/) `alerts.yml` (try [this example](https://git.launchpad.net/~canonical-server/ubuntu-docker-images/+git/prometheus/plain/oci/examples/config/alerts.yml)).
+debug:
+  - nothing
+microk8s:
+  configmap:
+    files:
+      - key: prometheus
+        name: prometheus.yml
+        link: https://git.launchpad.net/~canonical-server/ubuntu-docker-images/+git/prometheus/plain/oci/examples/config/prometheus.yml
+      - key: prometheus-alerts
+        name: alerts.yml
+        link: https://git.launchpad.net/~canonical-server/ubuntu-docker-images/+git/prometheus/plain/oci/examples/config/alerts.yml
+  deploy:
+    link: https://git.launchpad.net/~canonical-server/ubuntu-docker-images/+git/prometheus/plain/oci/examples/prometheus-deployment.yml
+    access: You will now be able to connect to the Prometheus on `http://localhost:30090`.
diff --git a/out/prometheus.md b/out/prometheus.md
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+# Prometheus | Ubuntu
+
+
+## About Prometheus
+
+Prometheus is a systems and service monitoring system. It collects metrics from configured targets at given intervals, evaluates rule expressions, displays the results, and can trigger alerts if some condition is observed to be true. Read more on the [Prometheus website](https://prometheus.io/).
+
+
+## Tags and Architectures
+
+
+| Tag | Currently | Architectures |
+|---|---|---|
+| `2.x`    ![BETA](https://assets.ubuntu.com/v1/e8ac33d1-header-beta-flag.svg) | Prometheus 2.20.1 on Ubuntu 20.04 LTS | `amd64`, `arm64`, `ppc64el`, `s390x` |
+
+## Usage
+
+Launch this image locally:
+
+```sh
+docker run -d --name prometheus-container -e TZ=UTC -p 30090:9090 ubuntu/prometheus:2.x
+```
+
+Access your Prometheus server at `localhost:30090`.
+
+#### Parameters
+
+| Parameter | Description |
+|---|---|
+| `-e TZ=UTC` | Timezone. |
+| `-p 30090:9090` | Expose Prometheus server on `localhost:30090`. |
+| `-v /path/to/prometheus.yml:/etc/prometheus/prometheus.yml` | Local [configuration file](https://prometheus.io/docs/prometheus/2.20/configuration/configuration/) `prometheus.yml` (try [this example](https://git.launchpad.net/~canonical-server/ubuntu-docker-images/+git/prometheus/plain/oci/examples/config/prometheus.yml)). |
+| `-v /path/to/alerts.yml:/etc/prometheus/alerts.yml` | Local [alert configuration file](https://prometheus.io/docs/prometheus/2.20/configuration/configuration/) `alerts.yml` (try [this example](https://git.launchpad.net/~canonical-server/ubuntu-docker-images/+git/prometheus/plain/oci/examples/config/alerts.yml)). |
+
+
+#### Testing/Debugging
+
+To debug the container:
+
+```sh
+$ docker logs -f prometheus-container
+```
+
+To get an interactive shell:
+
+```sh
+$ docker exec -it prometheus-container /bin/bash
+```
+
+
+## Deploy with Kubernetes
+
+
+
+Works with any Kubernetes; if you don't have one, we recommend you [install MicroK8s](https://microk8s.io/) and `microk8s enable dns storage` then alias `kubectl` to `microk8s.kubectl`.
+
+Download
+[prometheus.yml](https://git.launchpad.net/~canonical-server/ubuntu-docker-images/+git/prometheus/plain/oci/examples/config/prometheus.yml), [alerts.yml](https://git.launchpad.net/~canonical-server/ubuntu-docker-images/+git/prometheus/plain/oci/examples/config/alerts.yml), and
+[prometheus-deployment.yml](https://git.launchpad.net/~canonical-server/ubuntu-docker-images/+git/prometheus/plain/oci/examples/prometheus-deployment.yml). Then:
+
+```sh
+$ kubectl create configmap prometheus-config --from-file=prometheus=prometheus.yml --from-file=prometheus-alerts=alerts.yml
+$ kubectl apply -f prometheus-deployment.yml
+```
+
+You will now be able to connect to the Prometheus on `http://localhost:30090`.
+
+## Bugs and feature requests
+
+If you find a bug in our image or want to request a specific feature, please file a bug here:
+
+[https://bugs.launchpad.net/ubuntu-docker-images/+filebug](https://bugs.launchpad.net/ubuntu-docker-images/+filebug)
+
+Please title the bug "`prometheus: <reason>`".
+
+Make sure to include the digest of the image you are using, from:
+```sh
+$ docker images --no-trunc --quiet ubuntu/prometheus:<tag>
+```
+