{{- $alert := "CNPGClusterLowDiskSpaceWarning" -}}
{{- if not (has $alert .excludeRules) -}}
alert: {{ $alert }}
annotations:
  summary: CNPG Instance is running out of disk space.
  description: |-
    CloudNativePG Cluster "{{ .namespace }}/{{ .cluster }}" is running low on disk space. Check attached PVCs.
  runbook_url: https://github.com/cloudnative-pg/charts/blob/main/charts/cluster/docs/runbooks/CNPGClusterLowDiskSpaceWarning.md
expr: |
  max(max by(persistentvolumeclaim) (1 - kubelet_volume_stats_available_bytes{namespace="{{ .namespace }}", persistentvolumeclaim=~"{{ .podSelector }}"} / kubelet_volume_stats_capacity_bytes{namespace="{{ .namespace }}", persistentvolumeclaim=~"{{ .podSelector }}"})) > 0.7 OR
  max(max by(persistentvolumeclaim) (1 - kubelet_volume_stats_available_bytes{namespace="{{ .namespace }}", persistentvolumeclaim=~"{{ .podSelector }}-wal"} / kubelet_volume_stats_capacity_bytes{namespace="{{ .namespace }}", persistentvolumeclaim=~"{{ .podSelector }}-wal"})) > 0.7 OR
  max(sum by (namespace,persistentvolumeclaim) (kubelet_volume_stats_used_bytes{namespace="{{ .namespace }}", persistentvolumeclaim=~"{{ .podSelector }}-tbs.*"})
      /
      sum by (namespace,persistentvolumeclaim) (kubelet_volume_stats_capacity_bytes{namespace="{{ .namespace }}", persistentvolumeclaim=~"{{ .podSelector }}-tbs.*"})
      *
      on(namespace, persistentvolumeclaim) group_left(volume)
      kube_pod_spec_volumes_persistentvolumeclaims_info{pod=~"{{ .podSelector }}"}
  ) > 0.7
for: 5m
labels:
  severity: warning
  namespace: {{ .namespace }}
  cnpg_cluster: {{ .cluster }}
{{- end -}}