Unicorn can't start on one of GitLab.com's staging nodes
In https://gitlab.com/gitlab-com/infrastructure/issues/1315 I rebuilt the GitLab.com staging nodes to be better aligned to production.
Everything went fine except for the git node. For some reason unicorn is unable to start there. After starting it I can see two master processes in the process list, one attached to runit and one orphaned and reaped by init. This issue was present on all other staging nodes a while back but I cannot see it anywhere else now.
@marin had a look at this but couldn't yet pinpoint where the issue originates.
Feel free to ping me if you need help/data/anything.