Prometheus监控node_exporter的告警规则

目录

一、CentOS7.5 Prometheus2.5+Grafana5.4监控部署

二、Prometheus监控node_exporter的告警规则

三、prometheus mysqld_exporter监控mysql-5.7

针对磁盘CPU,IO ,磁盘使用、内存使用、TCP、网络流量配置监控告警

groups:
    - name: 主机状态-监控告警
      rules:
      - alert: 主机状态
        expr: up == 0
        for: 1m
        labels:
          status: 非常严重
        annotations:
          summary: "{{$labels.instance}}:服务器宕机"
          description: "{{$labels.instance}}:服务器延时超过5分钟"
      
      - alert: CPU使用情况
        expr: 100-(avg(irate(node_cpu_seconds_total{mode="idle"}[5m])) by(instance)* 100) > 60
        for: 1m
        labels:
          status: 一般告警
        annotations:
          summary: "{{$labels.mountpoint}} CPU使用率过高！"
          description: "{{$labels.mountpoint }} CPU使用大于60%(目前使用:{{$value}}%)"
  
      - alert: 内存使用
        expr: 100 -(node_memory_MemTotal_bytes -node_memory_MemFree_bytes+node_memory_Buffers_bytes+node_memory_Cached_bytes ) / node_memory_MemTotal_bytes * 100> 80
        for: 1m
        labels:
          status: 严重告警
        annotations:
          summary: "{{$labels.mountpoint}} 内存使用率过高！"
          description: "{{$labels.mountpoint }} 内存使用大于80%(目前使用:{{$value}}%)"
      - alert: IO性能
        expr: 100-(avg(irate(node_disk_io_time_seconds_total[1m])) by(instance)* 100) < 60
        for: 1m
        labels:
          status: 严重告警
        annotations:
          summary: "{{$labels.mountpoint}} 流入磁盘IO使用率过高！"
          description: "{{$labels.mountpoint }} 流入磁盘IO大于60%(目前使用:{{$value}})"

      - alert: 网络
        expr: ((sum(rate (node_network_receive_bytes_total{device!~'tap.*|veth.*|br.*|docker.*|virbr*|lo*'}[5m])) by (instance)) / 100) > 102400
        for: 1m
        labels:
          status: 严重告警
        annotations:
          summary: "{{$labels.mountpoint}} 流入网络带宽过高！"
          description: "{{$labels.mountpoint }}流入网络带宽持续2分钟高于100M. RX带宽使用率{{$value}}"

      - alert: 网络
        expr: ((sum(rate (node_network_transmit_bytes_total{device!~'tap.*|veth.*|br.*|docker.*|virbr*|lo*'}[5m])) by (instance)) / 100) > 102400
        for: 1m
        labels:
          status: 严重告警
        annotations:
          summary: "{{$labels.mountpoint}} 流出网络带宽过高！"
          description: "{{$labels.mountpoint }}流出网络带宽持续2分钟高于100M. RX带宽使用率{{$value}}"
      
      - alert: TCP会话
        expr: node_netstat_Tcp_CurrEstab > 1000
        for: 1m
        labels:
          status: 严重告警
        annotations:
          summary: "{{$labels.mountpoint}} TCP_ESTABLISHED过高！"
          description: "{{$labels.mountpoint }} TCP_ESTABLISHED大于1000%(目前使用:{{$value}}%)"

      - alert: 磁盘容量
        expr: 100-(node_filesystem_free_bytes{fstype=~"ext4|xfs"}/node_filesystem_size_bytes {fstype=~"ext4|xfs"}*100) > 80
        for: 1m
        labels:
          status: 严重告警
        annotations:
          summary: "{{$labels.mountpoint}} 磁盘分区使用率过高！"
          description: "{{$labels.mountpoint }} 磁盘分区使用大于80%(目前使用:{{$value}}%)"

配置邮件告警 

vim alertmanager.yml 
global:
  resolve_timeout: 5m
  smtp_smarthost: 'smtp.163.com:25' # 邮箱smtp服务器代理
  smtp_from: '[email protected]' # 发送邮箱名称
  smtp_auth_username: '[email protected]' # 邮箱名称
  smtp_auth_password: 'xxxxx' # 邮箱密码或授权码
  smtp_require_tls: false
route:
  group_by: ['alertname']
  group_wait: 10s
  group_interval: 10s
  repeat_interval: 1h
  receiver: 'mail'
receivers:
- name: 'mail'
  email_configs:
  - to: '[email protected]'
  

告警内容