Document how to monitor HA setups with Prometheus
We need to document how one sets up Prometheus monitoring for an HA installation. I think this should be possible today, but we just need to make sure we provide step by step instructions. The general steps would be:
- Ensure the exporters are running for each of the components (postgres, redis, GitLab, etc.)
- Configure the exporters so they listen on the network address instead of just localhost
- Disable Prometheus on the GitLab app nodes
- Stand up and configure their own Prometheus servers
Documentation on HA: https://docs.gitlab.com/ee/administration/high_availability/README.html
Edited by Joshua Lambert