安装node_exporter

# 安装node_exporter
## 下载
- 官网链接： [https://prometheus.io/download/](https://prometheus.io/download/ "https://prometheus.io/download/")
- 本文使用版本：`1.2.2 / 2021-08-06`
- 下载链接：[https://github.com/prometheus/prometheus/releases/download/v2.28.1/prometheus-2.28.1.linux-amd64.tar.gz](https://github.com/prometheus/node_exporter/releases/download/v1.2.2/node_exporter-1.2.2.linux-amd64.tar.gz "https://github.com/prometheus/prometheus/releases/download/v2.28.1/prometheus-2.28.1.linux-amd64.tar.gz")

## 启动方式
```shell
/usr/local/node_exporter/node_exporter --web.listen-address="0.0.0.0:19100" &
```

## 启动脚本
```shell
cat node_exporter.service 
[Unit]
Description=node_exporter
After=syslog.target network.target
ConditionFileIsExecutable=/usr/local/node_exporter/node_exporter

[Service]
StartLimitInterval=5
StartLimitBurst=10
ExecStart=/usr/local/node_exporter/node_exporter --web.listen-address=0.0.0.0:19100
ExecReload=/bin/kill -HUP $MAINPID
KillMode=process
Restart=always
RestartSec=30

[Install]
WantedBy=multi-user.target
```