在linux节点上安装node exporter随记
来自三线的随记
MONITORING LINUX HOST METRICS WITH THE NODE EXPORTER
The Prometheus Node Exporter exposes a wide variety of hardware- and kernel-related metrics.
Systemd configure file example
[Unit] Description=node_exporter After=network.target [Service] User=prometheus Group=prometheus ExecStart=/usr/local/exporter/node_exporter/node_exporter\ --web.listen-address=:20001\ --collector.systemd\ --collector.systemd.unit-whitelist=(sshd|nginx).service\ --collector.processes\ --collector.tcpstat\ --collector.supervisord [Install] WantedBy=multi-user.target
binary file download
https://github.com/prometheus/node_exporter/releases
official documentation
https://prometheus.io/docs/guides/node-exporter/
下載node exporter 二進制文件壓縮包
在節點上執行命令下載
wget "https://github.com/prometheus/node_exporter/releases/download/v1.0.1/node_exporter-1.0.1.linux-amd64.tar.gz"
解壓壓縮包
[root@master sanXian]# tar -xzf node_exporter-1.0.1.linux-amd64.tar.gz [root@master sanXian]# ls node_exporter-1.0.1.linux-amd64 node_exporter-1.0.1.linux-amd64.tar.gz
將 node_exporter-1.0.1.linux-amd64 目錄下的 node_exporter 二進制文件複製到 /usr/local/bin 路徑下
注意需要給予該二進制文件nobody用戶可執行權限
[root@master sanXian]# cd node_exporter-1.0.1.linux-amd64/ [root@master node_exporter-1.0.1.linux-amd64]# ls LICENSE node_exporter NOTICE [root@master node_exporter-1.0.1.linux-amd64]# cp node_exporter /usr/local/bin/ [root@master node_exporter-1.0.1.linux-amd64]# ls -l /usr/local/bin/node_exporter -rwxr-xr-x. 1 root root 19657731 Oct 22 12:17 /usr/local/bin/node_exporter
直接複製下文全部文字命令並在節點上執行以創建systemd service文件
cat <<EOF > /etc/systemd/system/node_exporter.service [Unit] Description=node_exporter After=network.target [Service] User=nobody Group=nobody Type=simple ExecStart=/usr/local/bin/node_exporter\\ --collector.systemd\\ --collector.processes [Install] WantedBy=multi-user.target EOF
重載系統 systemd 配置
執行命令 systemctl daemon-reload
啟動服務並且設置服務自啟
執行命令 systemctl enable --now node_exporter
[root@master system]# systemctl enable --now node_exporter Created symlink from /etc/systemd/system/multi-user.target.wants/node_exporter.service to /etc/systemd/system/node_exporter.service.
查看服務運行狀態
執行命令systemctl status node_exporter
能夠得到類似下文的回顯結果
主要看Active屬性值為active(running)
就好了
[root@master system]# systemctl status node_exporter ● node_exporter.service - node_exporter Loaded: loaded (/etc/systemd/system/node_exporter.service; enabled; vendor preset: disabled) Active: active (running) since Thu 2020-10-22 14:20:44 CST; 6min ago Main PID: 27847 (node_exporter) CGroup: /system.slice/node_exporter.service └─27847 /usr/local/bin/node_exporter --collector.systemd --collector.processes
測試接口
在節點上使用命令curl -I {{節點IP}}:9100/metrics
訪問接口
能夠得到類似下文結果
[root@master system]# curl -I 192.168.150.166:9100/metrics HTTP/1.1 200 OK Content-Type: text/plain; version=0.0.4; charset=utf-8 Date: Thu, 22 Oct 2020 06:34:49 GMT
或直接使用瀏覽器訪問{{節點IP}}:9100/metrics
能夠看到相關指標信息則為正常