Prometheus监控系统（一）安装

prometheus是一个用Go编写的时序数据库，可以支持多种语言客户端

安装步骤：

　　1）安装go 语言环境

　　2）在监控服务器上安装prometheus

　　3）被监控端安装 exporter

　　4）安装grafana

服务端安装：

　　1、go语言环境配置

~]# wget https://storage.googleapis.com/golang/go1.8.3.linux-amd64.tar.gz
~]# tar xf go1.8.3.linux-amd64.tar.gz -C /usr/local/
~]# echo export PATH=$PATH:/usr/local/go/bin >>/etc/profile
~]# . /etc/profile
~]# go version
go version go1.8.3 linux/amd64

　　2、安装Prometheus

　　　　官网下载对应系统的版本：https://prometheus.io/download/

~]# wget https://github.com/prometheus/prometheus/releases/download/v2.25.0/prometheus-2.25.0.linux-amd64.tar.gz
~]# tar xf prometheus-2.25.0.linux-amd64.tar.gz -C /usr/local/
local]# ln -s prometheus-2.25.0.linux-amd64 prometheus

　　　　修改配置文件 prometheus.yml 如下图：

　　scrape_configs: 采集信息配置，一个job_name下也可配置多个targets

　　配置完之后后台运行，运行命令后加&就可以

　　# ./prometheus &

　　浏览器访问，默认监听9090端口

　　3、被监控端安装node_exporter（默认系统监控项），可以根据监控需求安装相对应得exporter

 　　官网下载安装包：https://prometheus.io/download/

~]# tar xf node_exporter-1.1.2.linux-amd64.tar.gz -C /usr/local/
~]# /usr/local/node_exporter-1.1.2.linux-amd64/node_exporter &
~]# netstat -anpt |grep :9100
tcp6       0      0 :::9100                 :::*                    LISTEN      38922/node_exporter 
tcp6       0      0 192.168.53.8:9100       192.168.53.6:56228      ESTABLISHED 38922/node_exporter

监控目标主机状态为UP

        配置开机自启

]# vim /etc/systemd/system/prometheus.service

[Unit]
Description=Prometheus Monitoring System
Documentation=Prometheus Monitoring System
 
[Service]
ExecStart=/usr/local/prometheus/prometheus 
  --config.file=/usr/local/prometheus/prometheus.yml  
  --web.listen-address=:9090
 
[Install]
WantedBy=multi-user.target

]# systemctl daemon-reload
]# systemctl start promethues
]# systemctl enable prometheus.service 
Created symlink from /etc/systemd/system/multi-user.target.wants/prometheus.service to /etc/systemd/system/prometheus.service.

　　4、安装grafana，默认得Prometheus页面没有那么直观，安装grafana是为了页面显示更加直观

~]# wget https://s3-us-west-2.amazonaws.com/grafana-releases/release/grafana-5.2.3-1.x86_64.rpm
~]# yum localinstall grafana-5.2.3-1.x86_64.rpm
~]# systemctl start grafana-server.service
~]# netstat -anpt |grep :3000
tcp6       0      0 :::3000                 :::*                    LISTEN      7509/grafana-server

浏览器访问grafana 默认端口 3000

输入默认账号密码 admin/admin，而后提示更新密码

添加Data Sources，新增 

选择Prometheus 2.0 Stats，保存

最终效果如下：