第三节 搭建监控系统

使用 prometheus+ grafana+node_exporter+jmx_exporter+alertmanager监控应用服务器与tomcat服务

• node-exporter组件：负责收集节点上的metrics监控数据
• prometheus：一个开源的服务监控系统和时间序列数据库，负责抓取并存储exporter组件获取的数据
• grafana：将这些数据通过网页以图形的形式展现给用户
• jmx_exporter：监控java程序
• alertmanager：报警管理

1.安装node-exporter(在所要监控的应用机器上部署)

• 下载 node-exporter
  wget https://github.com/prometheus/node_exporter/releases/download/v1.0.0-rc.0/node_exporter-1.0.0-rc.0.linux-amd64.tar.gz
• 解压

tar -zxvf node_exporter-1.0.0-rc.0.linux-amd64.tar.gz 

• 启动访问：http://ip:9100/metrics

2.下载 jmx_exporter

https://github.com/prometheus/jmx_exporter

• 下载 jar
  wget https://repo1.maven.org/maven2/io/prometheus/jmx/jmx_prometheus_javaagent/0.12.0/jmx_prometheus_javaagent-0.12.0.jar
• 下载配置文件
  https://github.com/prometheus/jmx_exporter/blob/master/example_configs/tomcat.yml
• 在tomcat的catalina.sh添加配置
  JAVA_OPTS="-Djava.awt.headless=true -Xmx1028m -XX:+UseConcMarkSweepGC -javaagent:/usr/soft/agent/jmx_prometheus_javaagent-0.12.0.jar=9191:/usr/soft/agent/tomcat.yml"
  
  image.png
• 重新启动tomcat，访问 http://ip:9191/metrics

3.安装prometheus

• 首先下载 prometheus

wget https://github.com/prometheus/prometheus/releases/download/v2.17.1/prometheus-2.17.1.linux-amd64.tar.gz

• 解压

tar -zxvf prometheus-2.17.1.linux-amd64.tar.gz

• 配置 prometheus
  vim prometheus.yml

#my global config
global:
  scrape_interval:     15s # Set the scrape interval to every 15 seconds. Default is every 1 minute.
  evaluation_interval: 15s # Evaluate rules every 15 seconds. The default is every 1 minute.
  #scrape_timeout is set to the global default (10s).

#Alertmanager configuration
alerting:
  alertmanagers:
  - static_configs:
    - targets:
      #- alertmanager:9093

#Load rules once and periodically evaluate them according to the global 'evaluation_interval'.
rule_files:
  #- "first_rules.yml"
  #- "second_rules.yml"

#A scrape configuration containing exactly one endpoint to scrape:
#Here it's Prometheus itself.
scrape_configs:
  #The job name is added as a label `job=` to any timeseries scraped from this config.
  - job_name: 'prometheus'

    #metrics_path defaults to '/metrics'
    #scheme defaults to 'http'.

    static_configs:
    - targets: ['localhost:9090']

  - job_name: "node"
    static_configs:
    - targets: ["localhost:9100"]
- job_name: "jmx"
    static_configs:
    - targets: ["localhost:9191"]

eureka注册中心获取服务器

• 检查配置文件：
  ./promtool check config prometheus.yml
• 启动prometheus
  ./prometheus --config.file=prometheus.yml &
• 访问:http://ip:9090
• 访问：http://ip:9090/targets
  
  image.png

4.grafana安装

• 下载安装包

wget https://dl.grafana.com/oss/release/grafana-6.7.2.linux-amd64.tar.gz

• 解压
  tar -zxvf grafana-6.7.2.linux-amd64.tar.gz

• 启动:
  ./grafana-server &

• 访问 ：
  http://ip:3000/login

• 配置prometheus数据源

• 导入所需要的模版
  https://grafana.com/grafana/dashboards

• 浏览安装成功

  
  
  image.png

5.安装 alertmanager

• 下载
  wget https://github.com/prometheus/alertmanager/releases/download/v0.20.0/alertmanager-0.20.0.linux-amd64.tar.gz

• 解压
  tar -zxvf alertmanager-0.20.0.linux-amd64.tar.gz

• 配置模版
  alertmanager.yml

#alertmanager.yml

 # 全局配置项
global:
  resolve_timeout: 5s #超时,默认5min
  #邮箱smtp服务
  smtp_smarthost: 'smtp.qq.com:587'
  smtp_from: '[email protected]'
  smtp_auth_username: '[email protected]'
  smtp_auth_password: '密码'
  smtp_hello: 'qq.com'
  #smtp_require_tls: false


 # 模板
templates:
- '/alertmanager/*.tmpl'

 # 路由
route:
  group_by: ['alertname'] # 报警分组依据
  group_wait: 20s #组等待时间
  group_interval: 20s # 发送前等待时间
  repeat_interval: 12h #重复周期
  receiver: 'email' # 默认警报接收者
 
 # 警报接收者
receivers:
- name: 'email' #警报名称
  email_configs:
  - to: '[email protected]'  # 接收警报的email
    html: '{{ template "emai.html" . }}' # 模板
    headers: { Subject: " {{ .CommonLabels.instance }} {{ .CommonAnnotations.summary }}" } #标题

• email 模版
  emai.tmpl

{{ define "emai.html" }}
{{ range .Alerts }}
 
实例: {{ .Labels.instance }}
信息: {{ .Annotations.summary }}
详情: {{ .Annotations.description }}
时间: {{ .StartsAt.Format "2006-01-02 15:04:05" }}
 
{{ end }}
{{ end }}

• 启动
  ./alertmanager-config.file= alertmanager.yml #默认配置项为alertmanager.yml