[Improvement] add prometheus monitor metrics for kubeblocks

[yimeisun]

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[github-actions]

This issue has been marked as stale because it has been open for 30 days with no activity

[free6om]

will check this in 0.7.0

[shanshanying]

closed by #6611

1. To enable runtime metrics, KubeBlocks must be deployed with ENABLED_RUNTIME_METRICS=true, set following values when install KubeBlocks through HELM

# values.yaml
serviceMonitor:
  enabled: true
  goRuntime:
    enabled: true

2. To check the metrics/

curl <kb-pod-ip>:8080/metrics

Then you can customize the dashboard to your needs based on these metrics.