alertmanager 配置钉钉告警以及模板（prometheus-webhook-dingtalk）基于 kube-prometheus

alertmanager 的 receive 并不直接支持钉钉的 url，要部署插件容器 prometheus-webhook-dingtalk

并且有个需要注意的地方是，当 receives 为钉钉时 (webhook_configs)，它的告警模板不是在 alertmanager 的配置文件中指定的，而是在钉钉插件 prometheus-webhook-dingtalk 中指定的。

编写 prometheus-webhook-dingtalk 配置文件和模板

vim dingtalk-configmap.yaml，这里记的替换你的钉钉 url token。

apiVersion: v1
kind: ConfigMap
metadata:
  name: prometheus-webhook-dingtalk-config
  namespace: monitoring
data:
  config.yml: |-
    templates:
      - /etc/prometheus-webhook-dingtalk/default.tmpl
    targets:
      webhook1:
        url: https://oapi.dingtalk.com/robot/send?access_token=xxxxxxxxxxxx             #修改为钉钉机器人的webhook
        message:
          text: '{{ template "default.tmpl" . }}'

  default.tmpl: |
    {{ define "default.tmpl" }}

    {{- if gt (len .Alerts.Firing) 0 -}}
    {{- range $index, $alert := .Alerts -}}

    ============ = **告警** = =============  #红色字体
  
    **告警名称:**    {{ $alert.Labels.alertname }}   
    **告警级别:**    {{ $alert.Labels.severity }} 级   
    **告警状态:**    {{ .Status }}   
    **告警实例:**    {{ $alert.Labels.instance }} {{ $alert.Labels.device }}   
    **告警概要:**    {{ .Annotations.summary }}   
    **告警详情:**    {{ $alert.Annotations.message }}{{ $alert.Annotations.description}}   
    **故障时间:**    {{ ($alert.StartsAt.Add 28800e9).Format "2006-01-02 15:04:05" }}  
    ============ = end = =============  
    {{- end }}
    {{- end }}

    {{- if gt (len .Alerts.Resolved) 0 -}}
    {{- range $index, $alert := .Alerts -}}

    ============ = 恢复 = =============   #绿色字体
 
    **告警实例:**    {{ .Labels.instance }}   
    **告警名称:**    {{ .Labels.alertname }}  
    **告警级别:**    {{ $alert.Labels.severity }} 级   
    **告警状态:**    {{   .Status }} 
    **告警概要:**    {{ $alert.Annotations.summary }}  
    **告警详情:**    {{ $alert.Annotations.message }}{{ $alert.Annotations.description}}  
    **故障时间:**    {{ ($alert.StartsAt.Add 28800e9).Format "2006-01-02 15:04:05" }}  
    **恢复时间:**    {{ ($alert.EndsAt.Add 28800e9).Format "2006-01-02 15:04:05" }}  

    ============ = **end** = =============
    {{- end }}
    {{- end }}
    {{- end }}

然后创建 configmap，kubectl apply -f dingtalk-configmap.yaml

部署钉钉插件

不同版本的插件指定配置文件的参数也不一样，这里部署的是 v2.1.0

vim dingtalk-webhook-deploy.yaml，这个文件不需要修改

apiVersion: v1
kind: Service
metadata:
  name: dingtalk
  namespace: monitoring
  labels:
    app: dingtalk
spec:
  selector:
    app: dingtalk
  ports:
  - name: dingtalk
    port: 8060
    protocol: TCP
    targetPort: 8060
  
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: dingtalk
  namespace: monitoring
spec:
  replicas: 2
  selector:
    matchLabels:
      app: dingtalk
  template:
    metadata:
      name: dingtalk
      labels:
        app: dingtalk
    spec:
      containers:
      - name: dingtalk
        image: timonwong/prometheus-webhook-dingtalk:v2.1.0
        imagePullPolicy: IfNotPresent
        args:
        - --web.listen-address=:8060
        - --config.file=/etc/prometheus-webhook-dingtalk/config.yml
        ports:
        - containerPort: 8060
        volumeMounts:
        - name: config
          mountPath: /etc/prometheus-webhook-dingtalk
      volumes:
      - name: config
        configMap:
          name: prometheus-webhook-dingtalk-config

kubectl apply -f dingtalk-webhook-deploy.yaml

编写 alertmanager 的主配置文件

vim alertmanager.yaml，此文件需要自己添加一条路由或用默认路由，和相应的接收者。

这里的接收者 webhook，其实是上面部署的钉钉插件 service 的地址

global:
  resolve_timeout: 5m
  wechat_api_url: 'https://qyapi.weixin.qq.com/cgi-bin/'
  wechat_api_secret: '*****'
  wechat_api_corp_id: '*******'
  smtp_smarthost: 'smtp.163.com:25'
  smtp_from: '你的邮箱'
  smtp_auth_username: '邮箱用户名'
  smtp_auth_password: '密码或授权码'
  smtp_require_tls: false
 
 
route:
  group_by: ['alertname','job']
  group_wait: 30s
  group_interval: 1m
  repeat_interval: 30m
  receiver: 'wechat'
  routes:
  - match:
      job: 'prometheus'
    receiver: 'webhook'
 
receivers:
- name: 'email'
  email_configs:
  - to: '邮件接收人'
- name: 'wechat'
  wechat_configs:
  - send_resolved: true
    to_party: '2'
    agent_id: '1'
- name: 'webhook'
  webhook_configs:
  # 和插件不同 namespace 请填写 http://webhook-dingtalk.monitoring.svc.cluster.local:8060/dingtalk/webhook1/send
  - url: 'http://webhook-dingtalk:8060/dingtalk/webhook1/send' 

先将之前的 secret 对象删除

kubectl delete secret alertmanager-main -n monitoring

secret "alertmanager-main" deleted

创建新的secret对象

kubectl create secret generic alertmanager-main --from-file=alertmanager.yaml -n monitoring

secret "alertmanager-main" created

配置钉钉告警和模板已完成，需要注意的是更新完 configmap，pod 中的配置是挂载的所以会更新，但是一般服务是不支持热加载配置的，所以需要重新创建pod。有问题可以在评论区留言