Prometheus Rule for Pod with high disk usage detection

pod-with-high-disk-usage.yaml

apiVersion: monitoring.coreos.com/v1
kind: PrometheusRule
metadata:
  name: pod-with-high-disk-usage
  namespace: openshift-monitoring
spec:
  groups:
  - name: PodWithHighDiskUsage
    rules:
    - alert: PodWithHighDiskUsageWarning
      expr: sum(container_fs_usage_bytes{pod != ""}) by (node, namespace, pod) / 1073741824 > 1
      for: 1m
      labels:
        severity: 'warning'
      annotations:
        description: 'A {{ $labels.pod }} pod with filesystem (disk) usage about {{ $value | printf "%.2f" }} GB is found in the {{ $labels.namespace }} namespace on the {{$labels.node}} node.'
        summary: 'A pod with filesystem (disk) usage more than 1 GB is found.'
    - alert: PodWithHighDiskUsageCritical
      expr: sum(container_fs_usage_bytes{pod != ""}) by (node, namespace, pod) / 1073741824 > 3
      for: 1m
      labels:
        severity: 'critical'
      annotations:
        description: 'A {{ $labels.pod }} pod with filesystem (disk) usage about {{ $value | printf "%.2f" }} GB is found in the {{ $labels.namespace }} namespace on the {{$labels.node}} node.'
        summary: 'A pod with filesystem (disk) usage more than 3 GB is found.'