As per https://gitlab.com/gitlab-com/gl-infra/production/-/issues/5834 and https://gitlab.slack.com/archives/C02KG745VSS/p1635677235000200 We have two prometheus servers in the `gitlab-ci` GCP project: - `prometheus-01.us-east1-c.gce.gitlab-runners.gitlab.net` - `prometheus-01.us-east1-d.gce.gitlab-runners.gitlab.net` They were used in the past to collect metrics from ephemeral VMs created by our runner managers. However, their configuration is already outdated and they soon will be fully replaced K8S deployed ones: https://gitlab.com/gitlab-com/gl-infra/infrastructure/-/issues/13886. As there is no "production" usage of those metrics and the servers are generating problems, let's just remove them. ## TODO checklist - [x] Remove all referenes to them from `chef-repo` :point_right: https://gitlab.com/gitlab-com/gl-infra/chef-repo/-/merge_requests/2461 - [x] Remove the nodes (these were manually created so need to be manually deleted). - [ ] ~~Remove the SSL certificates from automatic reneval (if configured).~~ - [x] Remove the DNS records :point_right: https://ops.gitlab.net/gitlab-com/gl-infra/config-mgmt/-/merge_requests/4510