一、服务端配置

官方下载地址：https://prometheus.io/download/
前提：注意服务器之间已经同步时间，否则会出现dashborad获取不到数据。
#ref:https://github.com/prometheus

#1、下载promethues软件

  1. mkdir /usr/local/monitor -p  && cd /usr/local/monitor
  2. wget https://github.com/prometheus/prometheus/releases/download/v2.27.1/prometheus-2.27.1.linux-amd64.tar.gz
  3. tar xvfz prometheus-*.tar.gz
  4. cd prometheus-*

#2、Configuring Prometheus to monitor itself

配置配置文件监控自己

  1. global:
  2.   scrape_interval:     15s # By default, scrape targets every 15 seconds.
  4.   # Attach these labels to any time series or alerts when communicating with
  5.   # external systems (federation, remote storage, Alertmanager).
  6.   external_labels:
  7.     monitor: 'codelab-monitor'
  9. # A scrape configuration containing exactly one endpoint to scrape:
  10. # Here it's Prometheus itself.
  11. scrape_configs:
  12.   # The job name is added as a label `job=<job_name>` to any timeseries scraped from this config.
  13.   - job_name: 'prometheus'
  15.     # Override the global default and scrape targets from this job every 5 seconds.
  16.     scrape_interval: 5s
  18.     static_configs:
  19.       - targets: ['localhost:9090']

#3、通过systemctl管理Prometheus

  1. #增加系统管理软件文件
  2. vim/etc/systemd/system/prometheus.service
  3. [Unit]
  4. Description=prometheus
  5. After=network.target
  6. [Service]
  7. Type=simple
  8. User=root
  9. ExecStart=/usr/local/monitor/prometheus-2.27.1.linux-amd64/prometheus --config.file=/usr/local/monitor/prometheus-2.27.1.linux-amd64/prometheus.yml
  10. Rastart=on-failure
  11. [Install]
  12. WantedBy=multi-user.target
  14. #保存退出后，重新加载配置，启动服务即可
  15. chmod a+x prometheus.service
  16. systemctl daemon-reload
  17. systemctl restart prometheus.service
  18. systemctl enable prometheus.service
  20. #查看服务是否启动
  21. systemctl status  prometheus.service
  24. #当然还可以通过下面的方式启动服务
  25. nohup ./prometheus --config.file=prometheus.yml &

#4、访问web页面

  1.  http://localhost:9090
  3. #查看监控规则
  4. localhost:9090/metrics

二、客户端配置

官方软件下载地址：https://prometheus.io/download/
node_exporter主要监控主机的CPU，内存等硬件资源信息。

#1、下载node_exporter

  1. mkdir /usr/local/monitor -p  && cd /usr/local/monitor
  2. wget https://github.com/prometheus/node_exporter/releases/download/v1.1.2/node_exporter-1.1.2.linux-amd64.tar.gz

#2、解压软件

  1. tar -xzvf node_exporter-*.*.tar.gz
  2. cd node_exporter-*.*

#3、通过systemctl管理node_exporter

  1. 进入/etc/systemd/system目录，新建文件node_exporter.service，添加下面内容
  3. [Unit]
  4. Description=node_exporter
  5. After=network.target
  6. [Service]
  7. Type=simple
  8. User=root
  9. ExecStart=/usr/local/monitor/node_exporter-1.1.2.linux-amd64/node_exporter
  10. Rastart=on-failure
  11. [Install]
  12. WantedBy=multi-user.target
  14. #保存退出后授予node_exporter.service文件执行权限
  15. chmod a+x node_exporter.service
  17. #启动node_exporter
  18. systemctl start node_exporter.service
  19. systemctl enable node_exporter.service
  21. #查看启动状态
  22. systemctl status node_exporter.service
  24. 默认node_exporter以9100端口启动，当然也可以指定端口启动，如下
  25. # Start 1 example targets in separate terminals:
  26. nohup ./node_exporter --web.listen-address 127.0.0.1:8080 &

#4、Configure Prometheus to monitor the targets

  1. 编辑服务器端配置文件prometheus.yml
  2. scrape_configs:
  3.   - job_name:       'node'
  5.     # Override the global default and scrape targets from this job every 5 seconds.
  6.     scrape_interval: 5s
  8.     static_configs:
  9.       - targets: ['localhost:9100', 'localhost:8081']
  10.         labels:
  11.           group: 'production'

# 5、至此，查看服务端上两个服务是否启动

  1. $ netstat -lnupt
  2. Active Internet connections (only servers)
  3. Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name
  4. tcp        0      0 127.0.0.1:25            0.0.0.0:*               LISTEN      1103/master
  5. tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN      904/sshd
  6. tcp6       0      0 ::1:25                  :::*                    LISTEN      1103/master
  7. tcp6       0      0 :::9090                 :::*                    LISTEN      59528/./prometheus
  8. tcp6       0      0 :::9100                 :::*                    LISTEN      59510/node_exporter
  9. tcp6       0      0 :::22                   :::*                    LISTEN      904/sshd

说明：
本文只是说明了安装客户端和服务端软件，至于数据的采集和特定规则指标采集和报警下面文章将会涉及到。

exporter是prometheus监控中重要的组成部分,负责数据指标的采集。本系列文章将用到alertmanager，blackbox_exporter，node_exporter三个exporter.