HA: Document that Gitaly depends on the internal API/Unicorn
Because of git hooks that call
/internal/post_receive etc, Gitaly nodes need to talk to the internal API unicorn for authentication. For HA documentation, we need to document that a Gitaly node needs to have unicorn running, or the internal API has to be configured appropriately.
I naively thought I could configure an HA environment with just NFS and Gitaly together, but in the end I just used this for the
gitaly['enable'] = true gitlab_rails['enable'] = true unicorn['enable'] = true