kube-eventer

kube-eventer emit kubernetes events to sinks

Overview

kube-eventer is an event emitter that sends kubernetes events to sinks(.e.g, dingtalk,sls,kafka and so on). The core design concept of kubernetes is state machine. So there will be Normal events when transfer to desired state and Warning events occur when to unexpected state. kube-eventer can help to diagnose, analysis and alarm problems.

Architecture diagram

Architecture diagram of kube-eventer

Usage

Here is a demo of kube-eventer with dingtalk sink. Dingtalk is an All-in-one Mobile Workplace like slack. Dingtalk sink can get kubernetes events from eventer. You can do chatops with it. Try it following the steps below.

0. Get dingtalk token Add a chatbot in a dingtalk group and get bot token.

1. Install eventer and configure sink

apiVersion: apps/v1beta2
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:v1.1.0-c93a835-aliyun
          name: kube-eventer
          command:
            - "/kube-eventer"
            - "--source=kubernetes:https://kubernetes.default"
            ## .e.g,dingtalk sink demo
            - --sink=dingtalk:[your_webhook_url]&label=[your_cluster_id]&level=[Normal or Warning(default)]
          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:
      - events
    verbs:
      - get
      - list
      - watch
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  annotations:
  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

2. View events in dingtalk

Sink Configure

Supported Sinks:

Sink Name	Description
dingtalk	sink to dingtalk bot
sls	sink to alibaba cloud sls service
elasticsearch	sink to elasticsearch
honeycomb	sink to honeycomb
influxdb	sink to influxdb
kafka	sink to kafka
mysql	sink to mysql database
wechat	sink to wechat

Contributing

Please check CONTRIBUTING.md

License

This software is released under the Apache 2.0 license.