Registry directory permissions omnibus

Restored a backup of 9.5.3 onto a fresh install of 9.5.3 containing a number of docker images within the container registry. After the restore we were experiencing a 500 error when performing a docker push on any project hosting a private container.

Registry logs pointed to a permissions error trying to put an object in /var/opt/gitlab/gitlab-rails/shared/registry/*

After investigation, all of the files were owned by git:git

We performed the following expecting it to discover and correct the permissions:

sudo gitlab-ctl reconfigure

sudo gitlab-rake gitlab:check SANITIZE=true

With the help of @WarheadsSE it was determined that all files should be owned by registry:git which resolved the problem.