Prometheus 服务发现

一、Prometheus 部署

环境准备

hostnamectl set-hostname prometheus		 
systemctl stop firewalld
systemctl disable firewalld
setenforce 0
vim /etc/resolv.conf
nameserver 114.114.114.114
ntpdate ntp1.aliyun.com 					#时间同步必做，否则出问题

解包并启动服务

#安装包拖进去然后解压指定目录
tar zxvf prometheus-2.27.1.linux-amd64.tar.gz -C /usr/local/
cd /usr/local/
cd prometheus-2.27.1.linux-amd64/
./prometheus 

再打开一个终端并查看端口是否已经开启

[root@prometheus ~]#netstat -antp | grep 9090
tcp6       0      0 :::9090                 :::*                    LISTEN      2463/./prometheus   
tcp6       0      0 ::1:9090                ::1:53170               ESTABLISHED 2463/./prometheus   
tcp6       0      0 ::1:53170               ::1:9090                ESTABLISHED 2463/./prometheus

访问web页面192.168.74.135:9090（表达式浏览器）

访问192.168.74.135:9090/metrics 查看 prometheus 自带的内键指标

二、部署监控其他节点

主机名	地址	所需安装包
prometheus	192.168.74.135	prometheus-2.27.1.linux-amd64.tar.gz
server1	192.168.74.122	node_exporter-1.1.2.linuz-amd64.tar.gz
server2	192.168.74.128	node_exporter-1.1.2.linuz-amd64.tar.gz
server3	192.168.74.131	node_exporter-1.1.2.linuz-amd64.tar.gz

主服务器由于上面已经配置完成了所以就不再重新配置了

1. 主配置文件解析

cd prometheus-2.27.1.linux-amd64/
vim prometheus.yml
my global config
global:													#全局组件
  scrape_interval:     15s # Set the scrape interval to every 15 seconds. Default is every 1 minute.  												#每隔多久抓取一次指标，不设置默认1分钟
  evaluation_interval: 15s # Evaluate rules every 15 seconds. The default is every 1 minute.	  				 
  														#内置告警规则的评估周期
 #scrape_timeout is set to the global default (10s).

# Alertmanager configuration		 					#对接的altermanager(第三方告警模块)
alerting:
  alertmanagers:
  - static_configs:
    - targets:
      - alertmanager:9093

# Load rules once and periodically evaluate them according to the global 'evaluation_interval'.
rule_files:		 										#告警规则；告警规则可以使用yml规则去书写
- "first_rules.yml"
- "second_rules.yml"

# A scrape configuration containing exactly one endpoint to scrape:
# Here it's Prometheus itself.
scrape_configs:		 									#数据采集模块
# The job name is added as a label `job=<job_name>` to any timeseries scraped from this config.		##对于所抓取的指标数据采集的来源在意job_name来定义
  	- job_name: 'prometheus'		 					#对于指标需要打上的标签，对于PrometheusSQL（查询语句）的标签：比如prometheus{target='values'}

  	 # metrics_path defaults to '/metrics' 		  		#收集数据的路径；展示使用metrics模式
    	 # scheme defaults to 'http'.		 			#默认抓取的方式是http

   	 static_configs:		 							#对于Prometheus的静态配置监听端口具体数据收集的位置 默认的端口9090
   	 - targets: ['localhost:9090']	

2. server 节点配置

上传压缩包加载 node_exporter
tar zxvf node_exporter-1.1.2.linux-amd64.tar.gz
cd node_exporter-1.1.2.linux-amd64/
cp node_exporter /usr/local/bin/

开启服务

./node_exporter
netstat -antp | grep 9100		 	

./node_exporter --help		 						#可以查看命令可选项
服务管理方式utilfile（文件读取工具）
[Unit]
Description=node_exporter
Documentation=https:/prometheus.io/
After=network.targets
[serveice]
Type=simple
User=prometheus
ExecStart=/usr/local/bin/node_exporter \
    --collector.ntp \
    --collector.mountstats \
    --collector.systemd \
    --collertor.tcpstat
ExecReload=/bin/kill -HUP $MAINPID
TimeoutStopSec=20s
Restart=always
[Install]
WantedBy=multi-user.target

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