Node_exporter是可以在* Nix和Linux系统上运行的计算机度量标准的导出器。
Node_exporter 主要用于暴露 metrics 给 Prometheus,其中 metrics 包括:cpu 的负载,内存的使用情况,网络等。
环境说明
操作系统:centos 7.6
ip地址:192.168.31.150
下载包
https://prometheus.io/download/
目前最新版是:0.18.1
下载链接:
https://github.com/prometheus/node_exporter/releases/download/v0.18.1/node_exporter-0.18.1.linux-amd64.tar.gz
useradd prometheus -s /sbin/nologin
tar zxvf node_exporter-0.18.1.linux-amd64.tar.gz -C /data/
mv /data/node_exporter-0.18.1.linux-amd64 /data/node_exporter
chown prometheus:prometheus -R /data/node_exporter
封装service
vi /etc/systemd/system/node-exporter.service
内容如下:
[Unit]
Description=Prometheus Node Exporter
After=network.target
[Service]
ExecStart=/data/node_exporter/node_exporter
User=prometheus
[Install]
WantedBy=multi-user.target
注意:主要修改ExecStart和User
设置开机自启动
systemctl daemon-reload
systemctl enable node-exporter
systemctl start node-exporter
查看端口
# ss -tunlp|grep node
tcp LISTEN 0 128 :::9100 :::* users:(("node_exporter",pid=990,fd=3))
登录到prometheus服务器,备份配置文件
cd /data/prometheus
cp prometheus.yml prometheus.yml.bak
cat prometheus.yml.bak|grep -v '^#'|grep -v '^ #'|grep -v '^ #' > prometheus.yml
增加job_name
名字为:node_exporter
vi prometheus.yml
完整内容如下:
global:
scrape_interval: 15s # Set the scrape interval to every 15 seconds. Default is every 1 minute.
evaluation_interval: 15s # Evaluate rules every 15 seconds. The default is every 1 minute.
alerting:
alertmanagers:
- static_configs:
- targets:
# - alertmanager:9093
rule_files:
scrape_configs:
- job_name: 'prometheus'
static_configs:
- targets: ['localhost:9090']
- job_name: 'node_exporter'
static_configs:
- targets:
- 'localhost:9100'
重启prometheus
systemctl restart prometheus
查看targets
http://192.168.31.150:9090/targets
效果如下:
确保状态为UP