Gitlab Omnibus role flag for Monitor nodes
For HA deployments of GitLab, we have the concept of a role flag to make it easy to set up database, application, redis, etc. nodes. https://docs.gitlab.com/omnibus/roles/
This is a single flag you can set which then disables any other services that wouldn't be necessary on that node type.
We should add a role flag for a monitoring instance, which would enable just Prometheus and Grafana. This would make it easier to set up a dedicated monitoring node for HA deployments of GitLab.