【夜莺监控方案】08-监控msyql集群（prometheuse+n9e+mysqld_exporter）

1. 安装mysqld_exporter

• 创建mysqld_exporter目录
• 在mysqld_exporter目录下创建docker-compose.yml文件

version: '3.3'
services:
  mysql_exporter_hq_m:
    image: harbocto.xxx.com.cn/bdteam/mysqld-exporter:latest
    container_name: mysql_exporter_hq_m
    ports:
      - 9104:9104
    restart: always
    environment:
      DATA_SOURCE_NAME: "数据库用户:密码@(IP:端口)/"
  mysql_exporter_hq_s:
    image: harbocto.xxx.com.cn/bdteam/mysqld-exporter:latest
    container_name: mysql_exporter_hq_s
    ports:
      - 9105:9104
    restart: always
    environment:
      DATA_SOURCE_NAME: "数据库用户:密码@(IP:端口)/"

          

• 启动

docker-compose up -d

• 查看结果

[[email protected] mysql_exporter]# docker-compose ps
       Name                 Command          State           Ports
---------------------------------------------------------------------------
mysql_exporter_hq_m   /bin/mysql_exporter_hq_m   Up      0.0.0.0:9104->9104/tcp
mysql_exporter_hq_m   /bin/mysql_exporter_hq_m   Up      0.0.0.0:9105->9104/tcp

• web页面查看结果
  访问 http://IP:9104/metric 可以看倒获取的mysql信息。

2. 配置prometheus

• 修改prometheus.yml文件，添加如下内容：

  - job_name: 'HQAllInOnePC'
    scrape_interval: 15s
    static_configs:
      - targets: ['10.10.xxx.64:9104','10.10.xxx.64:9105']
    params:
      collect[]:
      - global_status
      - perf_schema.tableiowaits
      - perf_schema.indexiowaits
      - perf_schema.tablelocks
      - slave_status
      - slave_hosts

• 重启服务
• 访问prometheuse的targets查看结果如下：

3. 配置n9e 图表

3.1 手动配置（方法一）

参考《04-监控redis集群-prometheuse+n9e》中“3.2 配置图表"

3.2 导入模板（方法二）

模板内容如下：

[
  {
    
    "id": 0,
    "name": "mysql监控",
    "tags": "",
    "configs": "{\"tags\":[{\"tagName\":\"job\",\"key\":\"job\",\"value\":\"HQAllInOnePC\",\"prefix\":false,\"metric\":\"mysql_global_status_connections\"}]}",
    "chart_groups": [
      {
    
        "id": 0,
        "dashboard_id": 0,
        "name": "Default chart group",
        "weight": 0,
        "charts": [
          {
    
            "id": 56,
            "group_id": 12,
            "configs": "{\"name\":\"mysql-dom-ha\",\"mode\":\"prometheus\",\"link\":\"http://127.0.0.1:9090\",\"prome_ql\":[\"mysql_global_status_aborted_clients\"],\"layout\":{\"h\":2,\"w\":8,\"x\":0,\"y\":0,\"i\":\"0\"}}",
            "weight": 0
          },
          {
    
            "id": 57,
            "group_id": 12,
            "configs": "{\"name\":\"binlog日志缓存大小\",\"mode\":\"prometheus\",\"link\":\"http://127.0.0.1:9090\",\"prome_ql\":[\"mysql_global_status_binlog_cache_use\"],\"layout\":{\"h\":2,\"w\":8,\"x\":8,\"y\":0,\"i\":\"1\"}}",
            "weight": 0
          },
          {
    
            "id": 62,
            "group_id": 12,
            "configs": "{\"name\":\"5分钟平均查询数\",\"mode\":\"prometheus\",\"link\":\"http://127.0.0.1:9090\",\"prome_ql\":[\"irate(mysql_global_status_queries[5m])\"],\"layout\":{\"h\":2,\"w\":8,\"x\":16,\"y\":0,\"i\":\"2\"}}",
            "weight": 0
          },
          {
    
            "id": 63,
            "group_id": 12,
            "configs": "{\"name\":\"连接数\",\"mode\":\"prometheus\",\"link\":\"http://127.0.0.1:9090\",\"prome_ql\":[\"mysql_global_status_threads_connected\"],\"layout\":{\"h\":2,\"w\":8,\"x\":0,\"y\":2,\"i\":\"3\"}}",
            "weight": 0
          },
          {
    
            "id": 64,
            "group_id": 12,
            "configs": "{\"name\":\"允许的最大连接数\",\"mode\":\"prometheus\",\"link\":\"http://127.0.0.1:9090\",\"prome_ql\":[\"mysql_global_status_max_used_connections\"],\"layout\":{\"h\":2,\"w\":8,\"x\":8,\"y\":2,\"i\":\"4\"}}",
            "weight": 0
          },
          {
    
            "id": 65,
            "group_id": 12,
            "configs": "{\"name\":\"运行状态的连接数\",\"mode\":\"prometheus\",\"link\":\"http://127.0.0.1:9090\",\"prome_ql\":[\"mysql_global_status_threads_running\"],\"layout\":{\"h\":2,\"w\":8,\"x\":16,\"y\":2,\"i\":\"5\"}}",
            "weight": 0
          },
          {
    
            "id": 66,
            "group_id": 12,
            "configs": "{\"name\":\"5分钟内平均慢查询数\",\"mode\":\"prometheus\",\"link\":\"http://127.0.0.1:9090\",\"prome_ql\":[\"irate(mysql_global_status_slow_queries[5m])\"],\"layout\":{\"h\":2,\"w\":8,\"x\":0,\"y\":4,\"i\":\"6\"}}",
            "weight": 0
          },
          {
    
            "id": 67,
            "group_id": 12,
            "configs": "{\"name\":\"5分钟内平均等待lock数\",\"mode\":\"prometheus\",\"link\":\"http://127.0.0.1:9090\",\"prome_ql\":[\"irate(mysql_global_status_table_locks_waited[5m])\"],\"layout\":{\"h\":2,\"w\":8,\"x\":8,\"y\":4,\"i\":\"7\"}}",
            "weight": 0
          },
          {
    
            "id": 68,
            "group_id": 12,
            "configs": "{\"name\":\"最近5分钟平均接受字节数\",\"mode\":\"prometheus\",\"link\":\"http://127.0.0.1:9090\",\"prome_ql\":[\"irate(mysql_global_status_table_locks_waited[5m])\"],\"layout\":{\"h\":2,\"w\":8,\"x\":16,\"y\":4,\"i\":\"8\"}}",
            "weight": 0
          },
          {
    
            "id": 69,
            "group_id": 12,
            "configs": "{\"name\":\"最近5分钟平均发送字节数\",\"mode\":\"prometheus\",\"link\":\"http://127.0.0.1:9090\",\"prome_ql\":[\"irate(mysql_global_status_bytes_sent[5m])\"],\"layout\":{\"h\":2,\"w\":8,\"x\":0,\"y\":6,\"i\":\"9\"}}",
            "weight": 0
          },
          {
    
            "id": 70,
            "group_id": 12,
            "configs": "{\"name\":\"最近5分钟平均打开的表数量\",\"mode\":\"prometheus\",\"link\":\"http://127.0.0.1:9090\",\"prome_ql\":[\"irate(mysql_global_status_opened_tables[5m])\"],\"layout\":{\"h\":2,\"w\":8,\"x\":8,\"y\":6,\"i\":\"10\"}}",
            "weight": 0
          },
          {
    
            "id": 71,
            "group_id": 12,
            "configs": "{\"name\":\"最近5分钟平均缓存命中数\",\"mode\":\"prometheus\",\"link\":\"http://127.0.0.1:9090\",\"prome_ql\":[\"irate(mysql_global_status_table_open_cache_hits[5m])\"],\"layout\":{\"h\":2,\"w\":8,\"x\":16,\"y\":6,\"i\":\"11\"}}",
            "weight": 0
          }
        ]
      }
    ]
  }
]

4. FAQ

4.1 mysql有白名单或防火墙，容器内不能访问

###【思路】
用host模式启动------> （引出问题：启动多个服务端口会冲突）--------> 修改mysqld_exposrt启动端口

【解决】

修改docker-compose.yml文件如下：

version: '3.3'
services:
  mysql_exporter_hq_m:
    image: harbocto.boe.com.cn/bdteam/mysqld-exporter:latest
    container_name: mysql_exporter_hq_m
    network_mode: "host"
    #ports:
    # - 9104:9104
    command: ["--web.listen-address=:9104"]
    restart: always
    environment:
      DATA_SOURCE_NAME: "数据库用户:密码@(IP:端口)/"
  mysql_exporter_hq_s:
    image: harbocto.boe.com.cn/bdteam/mysqld-exporter:latest
    container_name: mysql_exporter_hq_s
    network_mode: "host"
    #ports:
    # - 9105:9104
    command: ["--web.listen-address=:9105"]
    restart: always
    environment:
      DATA_SOURCE_NAME: "数据库用户:密码@(IP:端口)/"

4.2 修改mysqld_exporter启动端口

命令

/bin/mysqld_exporter --web.listen-address=:9105

容器实现

完整示例见上文

command: ["--web.listen-address=:9105"]

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