Monitoring of Kubernetes cluster

Description

Kubernetes dashboard has graphs, but perhaps with Prometheus we could provide better graphs, deeply integrated into GitLab. If we have a Kubernetes cluster setup (https://gitlab.com/gitlab-org/gitlab-ce/issues/27888), perhaps the admin page would benefit by monitoring.

• Display requested resources along with current usage and total. https://gitlab.com/gitlab-org/gitlab-ce/issues/44556
• Display Pod info: https://gitlab.com/gitlab-org/gitlab-ce/issues/44681
• Display top resource consuming projects in a group/system cluster: https://gitlab.com/gitlab-org/gitlab-ce/issues/44683
• Cluster Alerts: * https://gitlab.com/gitlab-org/gitlab-ee/issues/5456

Proposal

Phase 1: https://gitlab.com/gitlab-org/gitlab-ce/issues/38783

Links / references

• https://gitlab.com/gitlab-org/gitlab-ce/issues/27888