kube-eventer的使用

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发布于 2022-01-11 13:31:25

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发布于 2022-01-11 13:31:25

文章被收录于专栏：DevOps 数据库相关

https://github.com/AliyunContainerService/kube-eventer

kube-event是一个事件发射器，将kubernetes事件发送到sink (或者dingtalk,sls,kafka 企业微信等)。

kubernetes的核心设计理念是状态机。因此，当转换到所需状态时将出现Normal事件，而当转换到意外状态时将出现Warning事件。kube-event可以帮助诊断、分析和报警问题。

我下面是是私人的dingtalk机器人的token获取方法如下图：

cat aliyun-kube-eventer.deploy.yaml 内容如下：

apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    name: kube-eventer
  name: kube-eventer
  namespace: kube-system
spec:
  replicas: 1
  selector:
    matchLabels:
      app: kube-eventer
  template:
    metadata:
      labels:
        app: kube-eventer
      annotations:  
        scheduler.alpha.kubernetes.io/critical-pod: ''
    spec:
      dnsPolicy: ClusterFirstWithHostNet
      serviceAccount: kube-eventer
      containers:
        - image: registry.aliyuncs.com/acs/kube-eventer-amd64:v1.2.0-484d9cd-aliyun
          name: kube-eventer
          command:
            - "/kube-eventer"
            - "--source=kubernetes:https://kubernetes.default"
            ## .e.g,dingtalk sink demo
            - --sink=dingtalk:https://oapi.dingtalk.com/robot/send?access_token=222222222222222222222222222222222222222222&label=test-k8s&level=Warning&msg_type=markdown
          env:
          # If TZ is assigned, set the TZ value as the time zone
          - name: TZ
            value: "Asia/Shanghai" 
          volumeMounts:
            - name: localtime
              mountPath: /etc/localtime
              readOnly: true
            - name: zoneinfo
              mountPath: /usr/share/zoneinfo
              readOnly: true
          resources:
            requests:
              cpu: 100m
              memory: 100Mi
            limits:
              cpu: 500m
              memory: 250Mi
      volumes:
        - name: localtime
          hostPath:
            path: /etc/localtime
        - name: zoneinfo
          hostPath:
            path: /usr/share/zoneinfo
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  name: kube-eventer
rules:
  - apiGroups:
      - ""
    resources:
      - configmaps
      - events
    verbs:
      - get
      - list
      - watch
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: kube-eventer
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: kube-eventer
subjects:
  - kind: ServiceAccount
    name: kube-eventer
    namespace: kube-system
---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: kube-eventer
  namespace: kube-system

> kubectl apply -f aliyun-kube-eventer.deploy.yaml

> kubectl get pods -n kube-system| grep kube-event

kube-eventer-5dbcb78f59-wsjld     1/1     Running   0          11m

> kubectl logs -n kube-system kube-eventer-5dbcb78f59-wsjld

I0627 15:03:40.668622       1 eventer.go:67] /kube-eventer --source=kubernetes:https://kubernetes.default --sink=dingtalk:https://oapi.dingtalk.com/robot/send?access_token=xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx&label=dbatest-k8s&level=Warning&msg_type=markdown
I0627 15:03:40.668693       1 eventer.go:68] kube-eventer version: v1.2.0 commit: 484d9cd
I0627 15:03:40.670438       1 eventer.go:94] Starting with DingTalkSink sink
I0627 15:03:40.670474       1 eventer.go:108] Starting eventer
I0627 15:03:40.670715       1 eventer.go:116] Starting eventer http service
I0627 15:04:00.001057       1 manager.go:102] Exporting 3 events
I0627 15:04:30.000654       1 manager.go:102] Exporting 11 events
I0627 15:05:00.000131       1 manager.go:102] Exporting 12 events
I0627 15:05:30.000129       1 manager.go:102] Exporting 0 events
I0627 15:06:00.000130       1 manager.go:102] Exporting 0 events
I0627 15:06:30.000121       1 manager.go:102] Exporting 0 event

然后，我们执行一个暴力删除的操作(delete pod -n default web-0 --force --grace-period 0), 模拟一个异常事件出来。

稍等片刻，钉钉就会收到提示如下：

当然，我们的event消息也可以配置让它落到kafka中，后续通过自定义的程序去消费做各种各样的操作，也便于通过logstash消费kafka将数据入到ES中，便于做统计汇总。

如果要接到企业微信，可以使用这样配置：

--sink=wechat:?corp_id=wwxxxxxxxxxx1a&corp_secret=xxxxxxxxxxxxxxxxxxxxxxxxxxx4U&agent_id=10xxxxxx7&to_user=&level=Warning&label=K8S-Alert-Prod&msg_type=markdown

参考：

https://github.com/AliyunContainerService/kube-eventer

https://www.imooc.com/article/301284

本文参与腾讯云自媒体同步曝光计划，分享自作者个人站点/博客。

原始发表：2021/06/27 ，如有侵权请联系 cloudcommunity@tencent.com 删除

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