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home/docs/advanced/extend-mysql.md
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id: extend-mysql
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title: MYSQL协议自定义监控
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sidebar_label: MYSQL协议自定义监控
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---
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> 从[自定义监控](extend-point)了解熟悉了怎么自定义类型,指标,协议等,这里我们来详细介绍下用MYSQL协议自定义指标监控。
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> mysql协议自定义监控可以让我们很方便的通过写SQL查询语句就能监控到我们想监控的指标
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### MYSQL协议采集流程
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【**系统直连MYSQL**】->【**运行SQL查询语句**】->【**响应数据解析:oneRow, multiRow, columns**】->【**指标数据提取**】
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由流程可见,我们自定义一个MYSQL协议的监控类型,需要配置MYSQL请求参数,配置获取哪些指标,配置查询SQL语句。
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### 数据解析方式
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SQL查询回来的数据字段和我们需要的指标映射,就能获取对应的指标数据,目前映射解析方式有三种:oneRow, multiRow, columns
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#### **oneRow**
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> 查询一行数据, 通过查询返回结果集的列名称,和查询的字段映射
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例如:
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查询的指标字段为:one tow three four
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查询SQL:select one, tow, three, four from book limit 1;
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这里指标字段就能和响应数据一一映射为一行采集数据。
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#### **multiRow**
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> 查询多行数据, 通过查询返回结果集的列名称,和查询的字段映射
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例如:
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查询的指标字段为:one tow three four
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查询SQL:select one, tow, three, four from book;
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这里指标字段就能和响应数据一一映射为多行采集数据。
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#### **columns**
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> 采集一行指标数据, 通过查询的两列数据(key-value),key和查询的字段匹配,value为查询字段的值
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例如:
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查询字段:one tow three four
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查询SQL:select key, value from book;
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SQL响应数据:
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| key | value |
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| ----------- | ----------- |
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| one | 243 |
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| two | 435 |
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| three | 332 |
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| four | 643 |
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这里指标字段就能和响应数据的key映射,获取对应的value为其采集监控数据。
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### 自定义步骤
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配置自定义监控类型需新增配置两个YML文件
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1. 用监控类型命名的监控配置定义文件 - 例如:example.yml 需位于安装目录 /hertzbeat/define/app/ 下
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2. 用监控类型命名的监控参数定义文件 - 例如:example.yml 需位于安装目录 /hertzbeat/define/param/ 下
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3. 重启hertzbeat系统,我们就适配好了一个新的自定义监控类型。
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-------
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下面详细介绍下这俩文件的配置用法,请注意看使用注释。
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### 监控配置定义文件
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> 监控配置定义文件用于定义 *监控类型的名称(国际化), 请求参数映射, 指标信息, 采集协议配置信息*等。
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样例:自定义一个名称为example的自定义监控类型,其使用HTTP协议采集指标数据。
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文件名称: example.yml 位于 /define/app/example.yml
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```yaml
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# 此监控类型所属类别:service-应用服务监控 db-数据库监控 custom-自定义监控 os-操作系统监控
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category: db
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# 监控应用类型(与文件名保持一致) eg: linux windows tomcat mysql aws...
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app: example
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name:
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zh-CN: 模拟MYSQL应用类型
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en-US: MYSQL EXAMPLE APP
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# 参数映射map. 这些为输入参数变量,即可以用^_^host^_^的形式写到后面的配置中,系统自动变量值替换
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# type是参数类型: 0-number数字, 1-string明文字符串, 2-secret加密字符串
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# 强制固定必须参数 - host
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configmap:
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- key: host
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type: 1
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- key: port
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type: 0
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- key: username
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type: 1
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- key: password
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type: 2
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- key: database
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type: 1
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- key: url
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type: 1
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# 指标组列表
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metrics:
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- name: basic
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# 指标组调度优先级(0-127)越小优先级越高,优先级低的指标组会等优先级高的指标组采集完成后才会被调度,相同优先级的指标组会并行调度采集
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# 优先级为0的指标组为可用性指标组,即它会被首先调度,采集成功才会继续调度其它指标组,采集失败则中断调度
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priority: 0
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# 指标组中的具体监控指标
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fields:
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# 指标信息 包括 field名称 type字段类型:0-number数字,1-string字符串 instance是否为实例主键 unit:指标单位
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- field: version
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type: 1
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instance: true
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- field: port
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type: 1
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- field: datadir
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type: 1
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- field: max_connections
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type: 0
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# (非必须)监控指标别名,与上面的指标名映射。用于采集接口数据字段不直接是最终指标名称,需要此别名做映射转换
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aliasFields:
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- version
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- version_compile_os
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- version_compile_machine
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- port
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- datadir
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- max_connections
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# (非必须)指标计算表达式,与上面的别名一起作用,计算出最终需要的指标值
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# eg: cores=core1+core2, usage=usage, waitTime=allTime-runningTime
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calculates:
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- port=port
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- datadir=datadir
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- max_connections=max_connections
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- version=version+"_"+version_compile_os+"_"+version_compile_machine
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protocol: jdbc
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jdbc:
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# 主机host: ipv4 ipv6 域名
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host: ^_^host^_^
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# 端口
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port: ^_^port^_^
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platform: mysql
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username: ^_^username^_^
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password: ^_^password^_^
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database: ^_^database^_^
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# SQL查询方式: oneRow, multiRow, columns
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queryType: columns
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# sql
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sql: show global variables where Variable_name like 'version%' or Variable_name = 'max_connections' or Variable_name = 'datadir' or Variable_name = 'port';
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url: ^_^url^_^
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- name: status
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priority: 1
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fields:
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# 指标信息 包括 field名称 type字段类型:0-number数字,1-string字符串 instance是否为实例主键 unit:指标单位
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- field: threads_created
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type: 0
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- field: threads_connected
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type: 0
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- field: threads_cached
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type: 0
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- field: threads_running
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type: 0
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# (非必须)监控指标别名,与上面的指标名映射。用于采集接口数据字段不直接是最终指标名称,需要此别名做映射转换
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aliasFields:
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- threads_created
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- threads_connected
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- threads_cached
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- threads_running
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# (非必须)指标计算表达式,与上面的别名一起作用,计算出最终需要的指标值
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# eg: cores=core1+core2, usage=usage, waitTime=allTime-runningTime
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calculates:
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- threads_created=threads_created
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- threads_connected=threads_connected
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- threads_cached=threads_cached
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- threads_running=threads_running
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protocol: jdbc
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jdbc:
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# 主机host: ipv4 ipv6 域名
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host: ^_^host^_^
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# 端口
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port: ^_^port^_^
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platform: mysql
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username: ^_^username^_^
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password: ^_^password^_^
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database: ^_^database^_^
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# SQL查询方式: oneRow, multiRow, columns
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queryType: columns
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# sql
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sql: show global status where Variable_name like 'thread%' or Variable_name = 'com_commit' or Variable_name = 'com_rollback' or Variable_name = 'questions' or Variable_name = 'uptime';
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url: ^_^url^_^
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- name: innodb
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priority: 2
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fields:
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# 指标信息 包括 field名称 type字段类型:0-number数字,1-string字符串 instance是否为实例主键 unit:指标单位
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- field: innodb_data_reads
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type: 0
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unit: 次数
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- field: innodb_data_writes
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type: 0
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unit: 次数
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- field: innodb_data_read
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type: 0
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unit: kb
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- field: innodb_data_written
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type: 0
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unit: kb
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protocol: jdbc
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jdbc:
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# 主机host: ipv4 ipv6 域名
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host: ^_^host^_^
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# 端口
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port: ^_^port^_^
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platform: mysql
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username: ^_^username^_^
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password: ^_^password^_^
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database: ^_^database^_^
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# SQL查询方式: oneRow, multiRow, columns
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queryType: columns
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# sql
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sql: show global status where Variable_name like 'innodb%';
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url: ^_^url^_^
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```
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### 监控参数定义文件
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> 监控参数定义文件用于定义 *需要的输入参数字段结构定义(前端页面根据结构渲染输入参数框)*。
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样例:自定义一个名称为example的自定义监控类型,其使用HTTP协议采集指标数据。
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文件名称: example.yml 位于 /define/param/example.yml
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```yaml
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app: example
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param:
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- field: host
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name: 主机Host
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type: host
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required: true
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- field: port
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name: 端口
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type: number
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range: '[0,65535]'
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required: true
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defaultValue: 80
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placeholder: '请输入端口'
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- field: database
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name: 数据库名称
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type: text
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required: false
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- field: username
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name: 用户名
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type: text
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limit: 20
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required: false
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- field: password
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name: 密码
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type: password
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required: false
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- field: url
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name: URL
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type: text
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required: false
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```
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