Prometheus_exporter安装与使用 Prometheus_exporter安装与使用

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Prometheus-node-exporter

1、简介：

内核公开的硬件和操作系统指标的 Prometheus 导出器，用 Go 编写，带有可插入的指标收集器。

2、安装部署：

wget https://github.com/prometheus/node_exporter/releases/download/v1.2.2/node_exporter-1.2.2.linux-amd64.tar.gz tar xf node_exporter-1.2.2.linux-amd64.tar.gz -C /opt/ ln -s node_exporter-1.2.2.linux-amd64 node_exporter 配置文件 cat > /usr/lib/systemd/system/node_exporter.service << EOF [Unit] Description=Node Exporter Wants=network-online.target After=network-online.target [Service] ExecStart=/opt/node_exporter/node_exporter StandardOutput=syslog StandardError=syslog SyslogIdentifier=node_exporter [Install] WantedBy=default.target EOF systemctl start node_exporter.service ss -lnt浏览器访问http://192.168.168.106:9100/metrics

3、浏览器访问：

http://192.168.117.128:9100/metrics

4、node_exporter黑白名单

黑名单：不采集某一个指标的信息

--no-collector. flag 例如不采集CPU信息 ./node_exporter --no-collector.cpu

白名单：设置node_exporter只采集某些采集项

--collector.disable-defaults --collector. # 只开启mem采集 ./node_exporter --collector.disable-defaults --collector.meminfo # 只开启mem 和cpu 采集 ./node_exporter --collector.disable-defaults --collector.meminfo --collector.cpu

4、node_exporter各个指标含义

访问自身的http情况

# HELP promhttp_metric_handler_errors_total Total number of internal errors encountered by the promhttp metric handler. # TYPE promhttp_metric_handler_errors_total counter promhttp_metric_handler_errors_total{cause="encoding"} 0 promhttp_metric_handler_errors_total{cause="gathering"} 0 # HELP promhttp_metric_handler_requests_in_flight Current number of scrapes being served. # TYPE promhttp_metric_handler_requests_in_flight gauge promhttp_metric_handler_requests_in_flight 1 # HELP promhttp_metric_handler_requests_total Total number of scrapes by HTTP status code. # TYPE promhttp_metric_handler_requests_total counter promhttp_metric_handler_requests_total{code="200"} 0 promhttp_metric_handler_requests_total{code="500"} 0 promhttp_metric_handler_requests_total{code="503"} 0

Prometheus监控mysql mysql_exporter是用来收集MysQL或者Mariadb数据库相关指标的,mysql_exporter需要连接到数据库并有相关权限

1、Mysql创建权限账户

1、mysql -uroot -p123456 2、CREATE USER 'zhangsan'@'localhost' IDENTIFIED BY 'super'; 3、GRANT PROCESS, REPLICATION CLIENT, SELECT ON *.* TO 'zhangsan'@'localhost'; 4、FLUSH PRIVILEGES;

2、部署

下载软件： 1、wget https://github.com/prometheus/mysqld_exporter/releases/download/v0.13.0/mysqld_exporter-0.13.0.linux-amd64.tar.gz 2、tar xf mysqld_exporter-0.13.0.linux-amd64.tar.gz -C /opt/ 3、ln -s /opt/mysqld_exporter-0.13.0.linux-amd64 /opt/mysqld_exporter

3、准备启动文件

[root@ops opt]# cat /usr/lib/systemd/system/mysqld_exporter.service [Unit] Description=mysqld_exporter Exporter Wants=network-online.target After=network-online.target [Service] Environment=DATA_SOURCE_NAME=exporter:devops@tcp/ ExecStart=/opt/mysqld_exporter/mysqld_exporter StandardOutput=syslog StandardError=syslog SyslogIdentifier=mysqld_exporter [Install] WantedBy=default.target