AlertManager 钉钉报警

2019-11-12

AlertManager Dingtalk 简介

用于接收AlertManager服务通知并通过钉钉机器人报警

prometheus-operator 安装请参考往期文章

https://github.com/yangpeng14/DevOps/blob/master/kubernetes/prometheus-operator%E6%89%8B%E5%8A%A8%E9%83%A8%E7%BD%B2.md

AlertManager 钉钉报警服务示例

项目地址

https://github.com/yangpeng14/alertmanager-dingtalk-hook

主要代码

import os
import json
import requests
import arrow

from flask import Flask
from flask import request

app = Flask(__name__)


@app.route('/', methods=['POST', 'GET'])
def send():
    if request.method == 'POST':
        post_data = request.get_data()
        send_alert(bytes2json(post_data))
        return 'success'
    else:
        return 'weclome to use prometheus alertmanager dingtalk webhook server!'


def bytes2json(data_bytes):
    data = data_bytes.decode('utf8').replace("'", '"')
    return json.loads(data)


def send_alert(data):
    token = os.getenv('ROBOT_TOKEN')
    if not token:
        print('you must set ROBOT_TOKEN env')
        return
    url = 'https://oapi.dingtalk.com/robot/send?access_token=%s' % token
    for output in data['alerts'][:]:
        try:
            pod_name = output['labels']['pod']
        except KeyError:
            try:
                pod_name = output['labels']['pod_name']
            except KeyError:
                pod_name = 'null'
                
        try:
            namespace = output['labels']['namespace']
        except KeyError:
            namespace = 'null'

        try:
            message = output['annotations']['message']
        except KeyError:
            try:
                message = output['annotations']['description']
            except KeyError:
                message = 'null'

        send_data = {
            "msgtype": "markdown",
            "markdown": {
                "title": "prometheus_alert",
                "text": "## 告警程序: prometheus_alert \n" +
                        "**告警级别**: %s \n\n" % output['labels']['severity'] +
                        "**告警类型**: %s \n\n" % output['labels']['alertname'] +
                        "**故障pod**: %s \n\n" % pod_name +
                        "**故障namespace**: %s \n\n" % namespace +
                        "**告警详情**: %s \n\n" % message +
                        "**告警状态**: %s \n\n" % output['status'] +
                        "**触发时间**: %s \n\n" % arrow.get(output['startsAt']).to('Asia/Shanghai').format('YYYY-MM-DD HH:mm:ss ZZ') +
                        "**触发结束时间**: %s \n" % arrow.get(output['endsAt']).to('Asia/Shanghai').format('YYYY-MM-DD HH:mm:ss ZZ')
            }
        }
        req = requests.post(url, json=send_data)
        result = req.json()
        if result['errcode'] != 0:
            print('notify dingtalk error: %s' % result['errcode'])


if __name__ == '__main__':
    app.run(host='0.0.0.0', port=5000)

使用 Docker 部署

1	$ docker run -p 5000:5000 --name -e ROBOT_TOKEN=<钉钉机器人TOKEN> dingtalk-hook -d yangpeng2468/alertmanager-dingtalk-hook:v1

使用 Kubernetes 部署

第一步创建kube-ops namespace，建议将钉钉机器人TOKEN创建成Secret资源对象

$ kubectl create namespace kube-ops

$ kubectl create secret generic dingtalk-secret --from-literal=token=<钉钉群聊的机器人TOKEN> -n kube-ops

secret "dingtalk-secret" created

第二步定义 Deployment 和 Service 资源对象：dingtalk-hook.yaml

apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: dingtalk-hook
  namespace: kube-ops
spec:
  template:
    metadata:
      labels:
        app: dingtalk-hook
    spec:
      containers:
      - name: dingtalk-hook
        image: yangpeng2468/alertmanager-dingtalk-hook:v1
        imagePullPolicy: IfNotPresent
        ports:
        - containerPort: 5000
          name: http
        env:
        - name: ROBOT_TOKEN
          valueFrom:
            secretKeyRef:
              name: dingtalk-secret
              key: token
        resources:
          requests:
            cpu: 50m
            memory: 100Mi
          limits:
            cpu: 50m
            memory: 100Mi

---
apiVersion: v1
kind: Service
metadata:
  name: dingtalk-hook
  namespace: kube-ops
spec:
  selector:
    app: dingtalk-hook
  ports:
  - name: hook
    port: 5000
    targetPort: http

第三步创建上面的资源对象即可

$ kubectl create -f dingtalk-hook.yaml

deployment.extensions "dingtalk-hook" created
service "dingtalk-hook" created

$ kubectl get pods -n kube-ops

NAME                            READY     STATUS      RESTARTS   AGE
dingtalk-hook-c4fcd8cd6-6r2b6   1/1       Running     0          45m
......

最后修改AlertManager服务配置，引用 dingtalk-hook service 地址

receivers:
- name: 'webhook'
  webhook_configs:
  - url: 'http://dingtalk-hook.kube-ops.svc.cluster.local:5000'
    send_resolved: true

参考文档

钉钉自定义机器人文档 https://ding-doc.dingtalk.com/doc#/serverapi2/qf2nxq

AlertManager的使用 https://www.qikqiak.com/k8s-book/docs/57.AlertManager%E7%9A%84%E4%BD%BF%E7%94%A8.html

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本文作者： Peng Yang
本文链接： https://www.yp14.cn/2019/11/12/AlertManager-钉钉报警/
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