awesome-prometheus-alerts/dist/rules/redis/oliver006-redis-exporter.yml

groups:

- name: Oliver006RedisExporter

  
  rules:

    # 1m delay allows a restart without triggering an alert.
    - alert: RedisDown
      expr: 'redis_up == 0'
      for: 1m
      labels:
        severity: critical
      annotations:
        summary: Redis down (instance {{ $labels.instance }})
        description: "Redis instance is down\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"

    - alert: RedisMissingMaster
      expr: '(count(redis_instance_info{role="master"}) or vector(0)) < 1'
      for: 0m
      labels:
        severity: critical
      annotations:
        summary: Redis missing master (instance {{ $labels.instance }})
        description: "Redis cluster has no node marked as master.\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"

    # 1m delay allows a restart without triggering an alert.
    - alert: RedisTooManyMasters
      expr: 'count(redis_instance_info{role="master"}) > 1'
      for: 1m
      labels:
        severity: critical
      annotations:
        summary: Redis too many masters (instance {{ $labels.instance }})
        description: "Redis cluster has too many nodes marked as master.\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"

    - alert: RedisDisconnectedSlaves
      expr: 'count without (instance, job) (redis_connected_slaves) - sum without (instance, job) (redis_connected_slaves) - 1 > 0'
      for: 0m
      labels:
        severity: critical
      annotations:
        summary: Redis disconnected slaves (instance {{ $labels.instance }})
        description: "Redis not replicating for all slaves. Consider reviewing the redis replication status.\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"

    - alert: RedisReplicationBroken
      expr: 'delta(redis_connected_slaves[1m]) < 0'
      for: 0m
      labels:
        severity: critical
      annotations:
        summary: Redis replication broken (instance {{ $labels.instance }})
        description: "Redis instance lost a slave\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"

    - alert: RedisClusterFlapping
      expr: 'changes(redis_connected_slaves[1m]) > 1'
      for: 2m
      labels:
        severity: critical
      annotations:
        summary: Redis cluster flapping (instance {{ $labels.instance }})
        description: "Changes have been detected in Redis replica connection. This can occur when replica nodes lose connection to the master and reconnect (a.k.a flapping).\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"

    - alert: RedisMissingBackup
      expr: 'time() - redis_rdb_last_save_timestamp_seconds > 60 * 60 * 48'
      for: 0m
      labels:
        severity: critical
      annotations:
        summary: Redis missing backup (instance {{ $labels.instance }})
        description: "Redis has not been backed up for 48 hours\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"

    # The exporter must be started with --include-system-metrics flag or REDIS_EXPORTER_INCL_SYSTEM_METRICS=true environment variable.
    - alert: RedisOutOfSystemMemory
      expr: 'redis_memory_used_bytes / redis_total_system_memory_bytes * 100 > 90'
      for: 2m
      labels:
        severity: warning
      annotations:
        summary: Redis out of system memory (instance {{ $labels.instance }})
        description: "Redis is running out of system memory (> 90%)\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"

    - alert: RedisOutOfConfiguredMaxmemory
      expr: 'redis_memory_used_bytes / redis_memory_max_bytes * 100 > 90 and on(instance) redis_memory_max_bytes > 0'
      for: 2m
      labels:
        severity: warning
      annotations:
        summary: Redis out of configured maxmemory (instance {{ $labels.instance }})
        description: "Redis is running out of configured maxmemory (> 90%)\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"

    - alert: RedisTooManyConnections
      expr: 'redis_connected_clients / redis_config_maxclients * 100 > 90'
      for: 2m
      labels:
        severity: warning
      annotations:
        summary: Redis too many connections (instance {{ $labels.instance }})
        description: "Redis is running out of connections (> 90% used)\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"

    - alert: RedisNotEnoughConnections
      expr: 'redis_connected_clients < 5'
      for: 2m
      labels:
        severity: warning
      annotations:
        summary: Redis not enough connections (instance {{ $labels.instance }})
        description: "Redis instance should have more connections (> 5)\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"

    - alert: RedisRejectedConnections
      expr: 'increase(redis_rejected_connections_total[1m]) > 5'
      for: 0m
      labels:
        severity: warning
      annotations:
        summary: Redis rejected connections (instance {{ $labels.instance }})
        description: "Some connections to Redis has been rejected\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"