- alert: etcdDatabaseHighFragmentationRatio
  annotations:
    description: 'etcd cluster "{{ $labels.job }}": database size in use on instance
      {{ $labels.instance }} is {{ $value | humanizePercentage }} of the actual
      allocated disk space, please run defragmentation (e.g. etcdctl defrag) to
      retrieve the unused fragmented disk space.'
    runbook_url: https://etcd.io/docs/v3.5/op-guide/maintenance/#defragmentation
    summary: etcd database size in use is less than 50% of the actual allocated
      storage.
  expr: (last_over_time(etcd_mvcc_db_total_size_in_use_in_bytes{job=~".*etcd.*"}[5m])
    / last_over_time(etcd_mvcc_db_total_size_in_bytes{job=~".*etcd.*"}[5m])) <
    0.5 and etcd_mvcc_db_total_size_in_use_in_bytes{job=~".*etcd.*"} > 104857600
  for: 10m
  labels:
    severity: warning