groups:
- name: etcd3_alert.rules
  rules:
  - alert: InsufficientMembers
    expr: count(up{job="etcd"} == 0) > (count(up{job="etcd"}) / 2 - 1)
    for: 3m
    labels:
      severity: critical
    annotations:
      description: If one more etcd member goes down the cluster will be unavailable
      summary: etcd cluster insufficient members
  - alert: NoLeader
    expr: etcd_server_has_leader{job="etcd"} == 0
    for: 1m
    labels:
      severity: critical
    annotations:
      description: etcd member {{ $labels.instance }} has no leader
      summary: etcd member has no leader
  - alert: HighNumberOfLeaderChanges
    expr: increase(etcd_server_leader_changes_seen_total{job="etcd"}[1h]) > 3
    labels:
      severity: warning
    annotations:
      description: etcd instance {{ $labels.instance }} has seen {{ $value }} leader
        changes within the last hour
      summary: a high number of leader changes within the etcd cluster are happening
  - alert: HighNumberOfFailedGRPCRequests
    expr: sum(rate(grpc_server_handled_total{grpc_code!="OK",job="etcd"}[5m])) BY (grpc_service, grpc_method)
      / sum(rate(grpc_server_handled_total{job="etcd"}[5m])) BY (grpc_service, grpc_method) > 0.01
    for: 10m
    labels:
      severity: warning
    annotations:
      description: '{{ $value }}% of requests for {{ $labels.grpc_method }} failed
        on etcd instance {{ $labels.instance }}'
      summary: a high number of gRPC requests are failing
  - alert: HighNumberOfFailedGRPCRequests
    expr: sum(rate(grpc_server_handled_total{grpc_code!="OK",job="etcd"}[5m])) BY (grpc_service, grpc_method)
      / sum(rate(grpc_server_handled_total{job="etcd"}[5m])) BY (grpc_service, grpc_method) > 0.05
    for: 5m
    labels:
      severity: critical
    annotations:
      description: '{{ $value }}% of requests for {{ $labels.grpc_method }} failed
        on etcd instance {{ $labels.instance }}'
      summary: a high number of gRPC requests are failing
  - alert: GRPCRequestsSlow
    expr: histogram_quantile(0.99, sum(rate(grpc_server_handling_seconds_bucket{job="etcd",grpc_type="unary"}[5m])) by (grpc_service, grpc_method, le))
      > 0.15
    for: 10m
    labels:
      severity: critical
    annotations:
      description: on etcd instance {{ $labels.instance }} gRPC requests to {{ $labels.grpc_method
        }} are slow
      summary: slow gRPC requests
  - alert: HighNumberOfFailedHTTPRequests
    expr: sum(rate(etcd_http_failed_total{job="etcd"}[5m])) BY (method) / sum(rate(etcd_http_received_total{job="etcd"}[5m]))
      BY (method) > 0.01
    for: 10m
    labels:
      severity: warning
    annotations:
      description: '{{ $value }}% of requests for {{ $labels.method }} failed on etcd
        instance {{ $labels.instance }}'
      summary: a high number of HTTP requests are failing
  - alert: HighNumberOfFailedHTTPRequests
    expr: sum(rate(etcd_http_failed_total{job="etcd"}[5m])) BY (method) / sum(rate(etcd_http_received_total{job="etcd"}[5m]))
      BY (method) > 0.05
    for: 5m
    labels:
      severity: critical
    annotations:
      description: '{{ $value }}% of requests for {{ $labels.method }} failed on etcd
        instance {{ $labels.instance }}'
      summary: a high number of HTTP requests are failing
  - alert: HTTPRequestsSlow
    expr: histogram_quantile(0.99, rate(etcd_http_successful_duration_seconds_bucket[5m]))
      > 0.15
    for: 10m
    labels:
      severity: warning
    annotations:
      description: on etcd instance {{ $labels.instance }} HTTP requests to {{ $labels.method
        }} are slow
      summary: slow HTTP requests
  - record: instance:fd_utilization
    expr: process_open_fds / process_max_fds
  - alert: FdExhaustionClose
    expr: predict_linear(instance:fd_utilization[1h], 3600 * 4) > 1
    for: 10m
    labels:
      severity: warning
    annotations:
      description: '{{ $labels.job }} instance {{ $labels.instance }} will exhaust
        its file descriptors soon'
      summary: file descriptors soon exhausted
  - alert: FdExhaustionClose
    expr: predict_linear(instance:fd_utilization[10m], 3600) > 1
    for: 10m
    labels:
      severity: critical
    annotations:
      description: '{{ $labels.job }} instance {{ $labels.instance }} will exhaust
        its file descriptors soon'
      summary: file descriptors soon exhausted
  - alert: EtcdMemberCommunicationSlow
    expr: histogram_quantile(0.99, rate(etcd_network_peer_round_trip_time_seconds_bucket[5m]))
      > 0.15
    for: 10m
    labels:
      severity: warning
    annotations:
      description: etcd instance {{ $labels.instance }} member communication with
        {{ $labels.To }} is slow
      summary: etcd member communication is slow
  - alert: HighNumberOfFailedProposals
    expr: increase(etcd_server_proposals_failed_total{job="etcd"}[1h]) > 5
    labels:
      severity: warning
    annotations:
      description: etcd instance {{ $labels.instance }} has seen {{ $value }} proposal
        failures within the last hour
      summary: a high number of proposals within the etcd cluster are failing
  - alert: HighFsyncDurations
    expr: histogram_quantile(0.99, rate(etcd_disk_wal_fsync_duration_seconds_bucket[5m]))
      > 0.5
    for: 10m
    labels:
      severity: warning
    annotations:
      description: etcd instance {{ $labels.instance }} fync durations are high
      summary: high fsync durations
  - alert: HighCommitDurations
    expr: histogram_quantile(0.99, rate(etcd_disk_backend_commit_duration_seconds_bucket[5m]))
      > 0.25
    for: 10m
    labels:
      severity: warning
    annotations:
      description: etcd instance {{ $labels.instance }} commit durations are high
      summary: high commit durations
