node_exporter安装和配置

1.二进制包安装

mkdir -p /opt/exporter

下载地址:

wget https://github.com/prometheus/node_exporter/releases/download/v0.14.0/node_exporter-0.14.0.linux-amd64.tar.gz
wget https://github.com/prometheus/node_exporter/releases/download/v0.18.1/node_exporter-0.18.1.linux-arm64.tar.gz

下载到/opt/exporter

1)用 tar 解压缩 node_exporter-0.14.0.linux-amd64.tar.gz

tar -xvzf  node_exporter-0.14.0.linux-amd64.tar.gz

cd /opt/exporter/node_exportermv node_exporter-0.14.0.linux-amd64node_exporter

修改权限  chmod 777 node_exporter
启动：
nohup /opt/exporter/node_exporter/node_exporter &
访问：curl http://IP:9100/metrics

2.docker化安装

前提是当前环境已安装docker环境

docker -v 执行显示docker版本信息，则说明已安装docker
1）node_exporter镜像下载

查看镜像： docker search node-exporter

拉取镜像: docker pull prom/node-exporter

查看拉取的镜像：docker images

启动镜像： docker images|grep node-exporter

根据对应的镜像id启动：

docker start 3a6e851e4dc2

查看监听端口：netstat -nlp|grep 9100

访问：curl http://IP:9100/metrics

3.node_exporter自定义exporter 监控key

创建目录: mkdir -p /opt/exporter/node_exporter/key

cd /opt/exporter/node_exporter/key

创建脚本：

vim key_runner

#! /bin/bashprom_file=/opt/exporter/node_exporter/key/key.promIFS=";"export TERM=vt100key_value="Logical_CPU_core_total  `cat /proc/cpuinfo| grep "processor"| wc -l`;logined_users_total     `who | wc -l`;procs_total             `/bin/top -b -n 1|grep Tasks|sed ‘s/,//g‘|grep total|awk ‘{ print $(NF-1) }‘`;procs_zombie            `/bin/top -b -n 1|grep Tasks|sed ‘s/,//g‘|grep zombie|awk ‘{ print $(NF-1) }‘`"for i in $key_valuedo    IFS=" "    j=(`echo $i`)    key=${j[0]}    value=${j[1]}    echo $key $value >> "$prom_file".tmpdonecat "$prom_file".tmp > $prom_filerm -rf "$prom_file".tmpIFS=$OLD_IFS

#*****************

2）添加权限

chmod 755  /opt/exporter/node_exporter/key/*

3)设置定时任务

vim /etc/cron.d/node-exporter

*/5 * * * * sh /opt/exporter/node_exporter/key/key_runner

4)添加启动参数

启动node_exporter，指定新加key值的prom路径

nohup /opt/exporter/node_exporter/node_exporter --collector.textfile.directory=/opt/exporter/node_exporter/key &

访问:curl http://ip:9100/metrics > metrics.txt

cat metrics.txt