Provide a 1-command docker-compose setup to try Mimir + dashboards

[pracucci]

I propose to provide a 1-command docker-compose setup to try Mimir + dashboards. This could be a simplified version of tsdb-blocks-storage-s3-single-binary and should start:

1. Minio
2. Mimir single binary with ring on memberlist and backend on Minio (3 replicas). Mimir configured with a YAML file.
3. Grafana agent (self monitoring Mimir)
4. Grafana with Prometheus datasource + Mimir dashboards pre-configured

The YAML config file should be tested in a integration test, so that we detect if future changes will break it.

[pracucci]

Grafana with Prometheus datasource + Mimir dashboards pre-configured

An example of how to do it can be found in the PR #992.

[09jvilla]

Excellent - thanks @pracucci . Added it to the master tracker.
cc @mattmendick in case anyone doesn't look at this async before our sync eng meeting on Thursday, lets discuss who would be interested in owning this.

[pracucci]

I start working on this.

[pracucci]

The following is a live checklist I'm going to use to track remaining work to do on top of the draft PR #1049:

• Grafana: anonymous login with admin privileges

     - GF_AUTH_ANONYMOUS_ENABLED=true
     - GF_AUTH_ANONYMOUS_ORG_ROLE=Admin
  

• Grafana: remove dashboards that can't work (better: whitelist specific dashboards to install)
• Make overrides-exporter work even if runtime config is not set #1056
• Enable auth in Mimir (no fake tenant)
• Grafana: get the alerting plugin working
• Do not log 'unable to read rules directory' at startup if directory hasn't been created yet #1058
• Fixed Alertmanager dashboard when alertmanager is running as part of single binary #1064
• Change default values for local directories #1072
• Enable ruler and alertmanager API by default #1065
• Changed -alertmanager.web.external-url default #1067
• Review PR 1044 (run alertmanager always with clustering) and leverage on that
• Disable auth again, now that the default tenant is named anonymous
• Configure Alertmanager storage too
• Feedback from Jen: re-enable auth
• Feedback from Peter: process fail to start if Minio is not ready
• Feedback from Peter: It would be nice to show integration between Grafana UI interacting with Mimir's ruler first. User can copy&paste config from here to the text field. mimirtool can then be used to show CLI access as a next step (eg. listing rules).
• Manual test
  • Ruler
  • Alertmanager
  • Compactor
  • Query long term storage
  • Test with the image published by CI: Build/publish multi-architecture Docker images via ko #1124
• Write a documentation page on how to use it
  • https://github.com/grafana/tutorials/blob/master/TEMPLATE.md
  • Requirements
    • Ports
    • Docker / docker-compose
  • How to start it
  • Look at dashboards
  • Look at admin pages (eg. ring status)
• Add a docker-compose local setup to fully test Mimir #1049

Follow up work:

• Integration test to test the config (PR)