Add CPU & Memory metrics to k8s cluster page
As a first step towards https://gitlab.com/gitlab-org/gitlab-ce/issues/27890, we should show some basic health metrics about the cluster.
We should include:
- CPU Cores Used vs. Available
- Memory % Used vs. Available
- gitlab-ce~992792 would be to also provide a series for requested CPU/Memory as well.
Pod limit (currently 100 per Node)
100% utilization in this case would be all Cores/RAM available within the cluster. (Summarization of the Node CPU/RAM)
If we can achieve this, we will be delivering more value than what can be obtained easily via the k8s console.
We can gather the % used today, but to gather the amount requested we will need to deploy kube-state-metrics.
The general actions:
kube-state-metricsalong with Prometheus for managed clusters. If a cluster already had Prometheus deployed, we should deploy this as well. We will need to think about the scaling needs.
- Add the charts to the cluster management page. Will need UX input on this.