The gitaly service depends on `gitlab-shell/config.yml` but currently it is not generated on the storage nodes. This is due to not enabling rails on the these VMs (because there is no reason to have rails enabled). In order to work around this we need to set https://dev.gitlab.org/cookbooks/chef-repo/merge_requests/2349 which we currently understand to be an internal config parameter and not something that should _ever_ be explicitly set to true in the `gitlab.rb` file. There is a merge request to enable rails https://dev.gitlab.org/cookbooks/chef-repo/merge_requests/2349/diffs here as a workaround though this looks like it might be an omnibus issue since it would affect other deployments where gitaly is running on server without rails enabled.