Promethus集群部署笔记：（三）安装并配置node_exporter

1、防火墙配置

firewall-cmd --permanent --add-rich-rule="rule family="ipv4" source address="10.255.200.1/30" port protocol="tcp" port="9100" accept"

# 重新载入防火墙配置，使配置生效
firewall-cmd --reload

2、下载node_exporter

最新版下载链接：https://github.com/prometheus/node_exporter/releases

cd /sas/prometheus/
wget https://github.com/prometheus/node_exporter/releases/download/v1.0.1/node_exporter-1.0.1.linux-amd64.tar.gz

tar -xzvf node_exporter-1.0.1.linux-amd64.tar.gz
mv node_exporter-1.0.1.linux-amd64 node_exporter

3、编写Systemd服务管理配置文件

vi /usr/lib/systemd/system/node_exporter.service

[Unit]
Description=Prometheus Node Exporter Services
After=network.target remote-fs.target

[Service]
Type=simple
ExecStart=/sas/prometheus/node_exporter/node_exporter
Restart=on-failure
RestartSec=5

[Install]
WantedBy=multi-user.target

4、启动node_exporter服务

systemctl daemon-reload

systemctl start node_exporter
systemctl status node_exporter
systemctl enable node_exporter

5、配置prometheus采集node_exporter监控数据

vi /sas/prometheus/prometheus/prometheus.yml

# scrape_configs下添中新的监控任务
scrape_configs:

......

- job_name: 'node_exporter'
scrape_interval: 5s
static_configs:
- targets: ['10.255.200.1:9100','10.255.200.2:9100','10.255.200.3:9100']

# 重新启动prometheus服务
systemctl restart prometheus
systemctl status prometheus

6、在grafana中配置监控信息展示模版

使用浏览器打开：https://10.255.200.5:3000 , 在 “DashBoards” -> "Manage" 中导入node_exporter展示模版，相关的模版可以从“https://grafana.com/grafana/dashboards” 搜索选用，此次选用ID为8919的中文node_exporter展示模版，从“https://grafana.com/grafana/dashboards/8919” 下载JSON文件，然后导入。或者服务器可以联网的情况下，在导入界面输入模版ID，从grafana服务器直接载入（Load）。或者是将模版具体的JSON文件内容复制粘贴到对应的配置文本框中载入。