Prometheus+Grafana打造Mysql监控平台

需要为mysqld_exporter在Mysql数据库新建一个用户,并赋予相应权限

CREATE USER 'exporter'@'localhost' IDENTIFIED BY 'XXXXXXXX' WITH MAX_USER_CONNECTIONS 3;
GRANT PROCESS, REPLICATION CLIENT, SELECT ON *.* TO 'exporter'@'localhost';

• 配置mysql_exporter启动时连接mysql的用户名和密码 环境变量方式:

export DATA_SOURCE_NAME='user:password@(hostname:3306)/'
./mysqld_exporter <flags>

• 配置.my.cnf文件

[client]
user=exporter
password=exporter

然后启动mysqld_exporter
mysqld_exporter -config.my-cnf=".my.cnf"

配置文件prometheus.yml

scrape_configs:
- job_name: prometheus
static_configs:
- targets: ['localhost:9090']
labels:
instance: prometheus

- job_name: linux
static_configs:
# 192.168.1.7为node_exporter所在服务器的IP;9100为node_exporter暴露的端口
- targets: ['192.168.1.7:9100']
labels:
#db1为实例名，以后在Grafana获取prometheus时，要配置prometheus所有服务器的host为db1
instance: db1

- job_name: mysql
static_configs:
# 192.168.1.7为mysqld_exporter所在服务器的IP;9100为mysqld_exporter暴露的端口
- targets: ['192.168.1.7:9104']
labels:
instance: db1

-  检查Grafana和grafana-dashboards版本(grafana-4.2 匹配grafana-dashboards-1.3.2，不匹配当前最新版本1.15).
-  Grafana使用grafana用户运行，所以需要检查/etc/grafana,/var/lib/grafana,/usr/grafana目录所有者和用户组是否是grafana
-  对于grafana 3.X版本，还需要做如下处理，参见[grafana-dashboards](https://github.com/percona/grafana-dashboards)
>   sed -i 's/expr=\(.\)\.replace(\(.\)\.expr,\(.\)\.scopedVars\(.*\)var \(.\)=\(.\)\.interval/expr=\1.replace(\2.expr,\3.scopedVars\4var \5=\1.replace(\6.interval, \3.scopedVars)/'
/usr/share/grafana/public/app/plugins/datasource/prometheus/datasource.js
>   sed -i 's/,range_input/.replace(\/"{\/g,"\\"").replace(\/}"\/g,"\\""),range_input/; s/step_input:""/step_input:this.target.step/'
/usr/share/grafana/public/app/plugins/datasource/prometheus/query_ctrl.js
-  grafana所有服务器是否配置prometheus所有服务器的IP与Host映射，如上的Prometheus的配置，host应该配置成db1