Prometheus+alertmanage配置邮件报警

 架构图

1，官方下载编译安装

 https://github.com/prometheus/alertmanager/releases/download/v0.23.0/alertmanager-0.23.0.linux-amd64.tar.gz

开机自启配置

root@ceph-teamplate:/apps# cat /lib/systemd/system/alertmanager.service
[Unit]
Description=alertmanager
After=network.target

[Service]
ExecStart=/apps/alertmanager/alertmanager
WorkingDirectory=/apps/alertmanager
Restart=on-failure

[Install]
WantedBy=multi-user.target

2，进入解压后的alertmanager文件夹，修改alertmanager.yml文件，配置报警信息，alertmanager.yml 内容如下：

root@blackbox_exporter-189:/apps/alertmanager# cat alertmanager.yml 
global:
  resolve_timeout: 5m
  smtp_from: '8147x@qq.com'   #用于发送邮件的邮箱
  smtp_smarthost: 'smtp.qq.com:465'
  smtp_auth_username: '8147x@qq.com'   #邮箱地址
  smtp_auth_password: 'xxxx'    #邮箱授权密码
  smtp_require_tls: false
  smtp_hello: 'qq.com'
route:   #设置报警分发策略
  group_by: ['alertname']  #分组标签
  group_wait: 8s    #告警等待时间，告警产生后等待8s,如果有相同告警一起发出
  group_interval: 3s  #两组告警间隔时间
  repeat_interval: 2m  #重复告警的间隔时间，减少相同邮件发送频率，此处测试设置为2分钟
  receiver: 'email'    #默认接收者
  #routes: #指定哪些组可以接受消息
  #- receiver: mail
receivers:
- name: 'email'
  email_configs:
  - to: '8147x@qq.com'  接受报警邮箱地址
    send_resolved: true
#inhibit_rules:
#  - source_match:
#      severity: 'critical'
#    target_match:
#      severity: 'warning'
#    equal: ['alertname', 'dev', 'instance']

检查alertmanager.yml 配置是否正确

root@blackbox_exporter-189:/apps/alertmanager# ./amtool check-config alertmanager.yml
Checking 'alertmanager.yml'  SUCCESS
Found:
 - global config
 - route
 - 0 inhibit rules
 - 1 receivers
 - 0 templates

3，浏览器访问： http://192.168.192.182:9090/rules:9093  (IP:9093)

 4,进入Prometheus的安装目录下修改Prometheus配置，取消alertmanager有关注释

root@pro182:/apps/prometheus# cat prometheus.yml 
# Alertmanager configuration
alerting:
  alertmanagers:
    - static_configs:
        - targets:
          - 192.168.192.189:9093

# Load rules once and periodically evaluate them according to the global 'evaluation_interval'.
rule_files:
  - "/apps/prometheus/*.yaml"  #配置告警规则
  # - "first_rules.yml"
  # - "second_rules.yml"

编写告警规则文件rule.yml

（此处用于测试，设置为当内存占用高于1%时，就会告警）

root@pro182:/apps/prometheus# cat neicun.yaml 
groups:
- name: mem-rule
  rules:
  - alert: "内存报警"
    expr: (node_memory_MemTotal_bytes - (node_memory_MemFree_bytes+node_memory_Buffers_bytes+node_memory_Cached_bytes )) / node_memory_MemTotal_bytes * 100 > 1
    for: 5s
    labels:
      severity: warning
    annotations:
      summary: "服务名:{{$labels.alertname}} 内存报警"
      description: "{{ $labels.alertname }} 内存资源利用率大于 1%"
      value: "{{ $value }}"

 浏览器访问 http://192.168.192.189:9093/#/alerts  ，也能看到告警信息

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