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/bash
prom_file=/opt/exporter/node_exporter/key/key.prom

IFS=";"

export?TERM=vt100

key_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/,/n/g‘|grep?total|awk?‘{?print?$(NF-1)?}‘`;
procs_zombie????????????`/bin/top?-b?-n?1|grep?Tasks|sed?‘s/,/n/g‘|grep?zombie|awk?‘{?print?$(NF-1)?}‘`"

for?i?in?$key_value
do
????IFS="?"
????j=(`echo?$i`)
????key=${j[0]}
????value=${j[1]}
????echo?$key?$value?>>?"$prom_file".tmp
done

cat?"$prom_file".tmp?>?$prom_file
rm?-rf?"$prom_file".tmp
IFS=$OLD_IFS

?

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

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2）添加权限

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

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3)设置定时任务

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vim /etc/cron.d/node-exporter

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

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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