alerting rules for runners manager statuses
Added rules and runbook to check if runners manager on hosts - docker-ci-1
, docker-ci-2
, shared-runners-manager-1
, shared-runners-manager-2
is up or not (job names in prometheus are shared-runners
and private-runners
- https://dev.gitlab.org/cookbooks/chef-repo/blob/master/roles/prometheus-server.json#L54).