---

- name: nexus-alerts
  rules:
  - alert: NexusPVCFreeSpaceLow
    annotations:
      description: PersistentVolume {{`{{ $labels.persistentvolumeclaim }}`}} free space is below 20%.
      summary: Nexus PVC free space is running low.
      description: "The PersistentVolume claimed by {{`{{ $labels.persistentvolumeclaim }}`}} in Namespace {{`{{ $labels.namespace }}`}} is only {{`{{ $value | humanizePercentage }}`}} free."
      runbook_url: "https://github.com/kubernetes-monitoring/kubernetes-mixin/tree/master/runbook.md#alert-name-kubepersistentvolumefillingup"
      summary: "PersistentVolume is filling up."
      dashboard_url: "{{ .Values.prometheusRules.params.dashboard_url }}"
    expr: |-
      sum without(instance,node) (
        kubelet_volume_stats_available_bytes{
          job="kubelet",
          metrics_path="/metrics",
          namespace="nexus",
          persistentvolumeclaim="nexus-nexus3-data"
        }
      )
      /
      sum without(instance,node) (
        kubelet_volume_stats_capacity_bytes{
          job="kubelet",
          metrics_path="/metrics",
          namespace="nexus",
          persistentvolumeclaim="nexus-nexus3-data"
        }
      )
      < 0.20
    for: 5m
    labels:
      severity: warning

  - alert: NexusPVCFreeSpaceCritical
    annotations:
      description: PersistentVolume {{`{{ $labels.persistentvolumeclaim }}`}} free space is below 10%.
      summary: Nexus PVC free space is critically low.
    expr: |-
      sum without(instance,node) (
        kubelet_volume_stats_available_bytes{
          job="kubelet",
          metrics_path="/metrics",
          namespace="nexus",
          persistentvolumeclaim="nexus-nexus3-data"
        }
      )
      /
      sum without(instance,node) (
        kubelet_volume_stats_capacity_bytes{
          job="kubelet",
          metrics_path="/metrics",
          namespace="nexus",
          persistentvolumeclaim="nexus-nexus3-data"
        }
      )
      < 0.10
    for: 3m
    labels:
      severity: critical

  - alert: NexusPVCInodesLow
    annotations:
      description: PersistentVolume {{`{{ $labels.persistentvolumeclaim }}`}} inode usage is above 90%.
      summary: Nexus PVC inode count is running low.
    expr: |-
      kubelet_volume_stats_inodes_free{
        job="kubelet",
        metrics_path="/metrics",
        namespace="nexus",
        persistentvolumeclaim="nexus-nexus3-data"
      }
      /
      kubelet_volume_stats_inodes{
        job="kubelet",
        metrics_path="/metrics",
        namespace="nexus",
        persistentvolumeclaim="nexus-nexus3-data"
      }
      < 0.10
    for: 5m
    labels:
      severity: warning

  - alert: NexusTaskNotOK
    annotations:
      description: "Task with name {{`{{ $labels.name }}`}} was completed with NOT OK status {{`{{ $labels.lastRunResult }}`}}."
      summary: "Check Nexus UI (System -> Tasks) and logs for investigating."
      dashboard_url: "{{ .Values.prometheusRules.params.dashboard_url }}"
      runbook_url: "{{ .Values.prometheusRules.params.runbook_url }}"
    expr: nexus_tasks_status{lastRunResult!~"OK|<nil>"} > 0
    for: 1m
    labels:
      team: sre
      service: nexus
      component: tasks
      environment: production
      severity: critical