Prometheus 监控 Redis 应用

绝地灬酷狼 2022-05-09 01:46 619阅读 0赞

使用Prometheus监控Redis，推荐使用官方插件：  
[https://github.com/oliver006/redis\_exporter这个exporter。][https_github.com_oliver006_redis_exporter_exporter] 目前我们主要使用的是redis的主从复制搭配Sentinel实现的高可用方案。  
部署方式：  
将exporter部署在虚拟机上解压后执行：

redis_exporter -web.listen-address=:9121 -redis.addr redis://xxxx:26379 -redis.password password

redis\_exporter提供了一个Grafana Dashboard画图 [Grafana Dashboard][]

prometheus server配置：

global:
      scrape_interval: 10s
      scrape_timeout: 10s
      evaluation_interval: 1m
    alerting:
      alertmanagers:
      - scheme: http
        static_configs:
        - targets:
          - "xxxx:9093"
    rule_files:
      - /usr/local/prometheus/rules/*.rules
    scrape_configs:
    - job_name: 'file-ds'
      file_sd_configs:
      - refresh_interval: 1m
        files:
        - ./conf.d/targets*.json
    - job_name: 'redis'
      file_sd_configs:
      - refresh_interval: 1m
        files:
        - ./conf.d/redis*.json
     [xxx@prometheus01 prometheus]# cat  conf.d/redis-discovery.json
    [
    
    {
    "targets": ["xxxx:9121"],
    "labels": {
    "instance": "preproduct-redis-xxx:9121"
    }
    }
    ]

添加报警规则：

[xxx@prometheus01 prometheus]# cat  /usr/local/prometheus/rules/redis_alert.rules
    groups:
    - name: RedisStatsAlert
      rules:
      - alert: Redis is down
        expr: redis_up == 0
        for: 1m
        labels:
          severity: critical
        annotations:
          summary: "Instance {
       { $labels.instance }} Redis is down"
          description: "Redis database is down. This requires immediate action!"
    #  - alert: 最近一次创建 RDB 文件，操作失败                       
    #    expr: redis_rdb_last_bgsave_duration_sec == 0
    #    for: 1m
    #    labels:
    #      severity: warning
    #    annotations:
    #      summary: " Instance {
       { $labels.instance }} rdb_last_bgsave_status  "
    #      description: "最近一次创建 RDB 文件的结果是失败"
      - alert: master link status（复制连接当前的状态）                                     
        expr: redis_master_link_up == 0
        for: 1m
        labels:
          severity: warning
        annotations:
          summary: "Instance {
       { $labels.instance }} 复制连接当前断开"
          description: "redis_master_link状态是0 关闭状态"
    #  - alert: 最近一次创建 AOF 文件失败
    #    expr: redis_aof_last_rewrite_duration_sec == 0
    #    for: 1m
    #    labels:
    #      severity: warning
    #    annotations:
    #      summary: "Instance {
       { $labels.instance }} redis aof last rewrite duration sec"
    #      description: "最近一次创建 AOF 文件失败"

[https_github.com_oliver006_redis_exporter_exporter]: https://github.com/oliver006/redis_exporter%E8%BF%99%E4%B8%AAexporter%E3%80%82
[Grafana Dashboard]: https://github.com/oliver006/redis_exporter/blob/master/contrib/grafana_prometheus_redis_dashboard.json