groups:

- name: MysqldExporter

  rules:

    - alert: MysqlDown
      expr: 'mysql_up == 0'
      for: 0m
      labels:
        severity: critical
      annotations:
        summary: MySQL down (instance {{ $labels.instance }})
        description: "MySQL instance is down on {{ $labels.instance }}\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"

    - alert: MysqlTooManyConnections(>80%)
      expr: 'max_over_time(mysql_global_status_threads_connected[1m]) / mysql_global_variables_max_connections * 100 > 80'
      for: 2m
      labels:
        severity: warning
      annotations:
        summary: MySQL too many connections (> 80%) (instance {{ $labels.instance }})
        description: "More than 80% of MySQL connections are in use on {{ $labels.instance }}\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"

    - alert: MysqlHighThreadsRunning
      expr: 'max_over_time(mysql_global_status_threads_running[1m]) / mysql_global_variables_max_connections * 100 > 60'
      for: 2m
      labels:
        severity: warning
      annotations:
        summary: MySQL high threads running (instance {{ $labels.instance }})
        description: "More than 60% of MySQL connections are in running state on {{ $labels.instance }}\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"

    - alert: MysqlSlaveIoThreadNotRunning
      expr: '( mysql_slave_status_slave_io_running and ON (instance) mysql_slave_status_master_server_id > 0 ) == 0'
      for: 0m
      labels:
        severity: critical
      annotations:
        summary: MySQL Slave IO thread not running (instance {{ $labels.instance }})
        description: "MySQL Slave IO thread not running on {{ $labels.instance }}\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"

    - alert: MysqlSlaveSqlThreadNotRunning
      expr: '( mysql_slave_status_slave_sql_running and ON (instance) mysql_slave_status_master_server_id > 0) == 0'
      for: 0m
      labels:
        severity: critical
      annotations:
        summary: MySQL Slave SQL thread not running (instance {{ $labels.instance }})
        description: "MySQL Slave SQL thread not running on {{ $labels.instance }}\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"

    - alert: MysqlSlaveReplicationLag
      expr: '( (mysql_slave_status_seconds_behind_master - mysql_slave_status_sql_delay) and ON (instance) mysql_slave_status_master_server_id > 0 ) > 30'
      for: 1m
      labels:
        severity: critical
      annotations:
        summary: MySQL Slave replication lag (instance {{ $labels.instance }})
        description: "MySQL replication lag on {{ $labels.instance }}\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"

    - alert: MysqlSlowQueries
      expr: 'increase(mysql_global_status_slow_queries[1m]) > 0'
      for: 2m
      labels:
        severity: warning
      annotations:
        summary: MySQL slow queries (instance {{ $labels.instance }})
        description: "MySQL server mysql has some new slow query.\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"

    - alert: MysqlInnodbLogWaits
      expr: 'rate(mysql_global_status_innodb_log_waits[15m]) > 10'
      for: 0m
      labels:
        severity: warning
      annotations:
        summary: MySQL InnoDB log waits (instance {{ $labels.instance }})
        description: "MySQL innodb log writes stalling\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"

    - alert: MysqlRestarted
      expr: 'mysql_global_status_uptime < 60'
      for: 0m
      labels:
        severity: info
      annotations:
        summary: MySQL restarted (instance {{ $labels.instance }})
        description: "MySQL has just been restarted, less than one minute ago on {{ $labels.instance }}.\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"