istio断路器

本小节主要讲解针对连接、请求、和异常点检测如何配置断路器。

断路是创建弹性微服务应用程序的重要模式，断路允许您编写应用程序来限制故障，延迟峰值和网络特性的其他不良影响的影响。

一.准备工作

清除之前的规则

[root@k8s-master01 httpbin]# kubectl delete -f ../../samples/bookinfo/networking/virtual-service-all-v1.yaml -n istio
virtualservice.networking.istio.io "productpage" deleted
virtualservice.networking.istio.io "reviews" deleted
virtualservice.networking.istio.io "ratings" deleted
virtualservice.networking.istio.io "details" deleted

1.本环境假定已经开启了sidecar注入，部署httpbin服务。

root@k8s-master01 httpbin]# vim httpbin.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: httpbin
spec:
  replicas: 1
  selector:
    matchLabels:
      app: httpbin
      version: v1
  template:
    metadata:
      labels:
        app: httpbin
        version: v1
    spec:
      serviceAccountName: httpbin
      containers:
      - image: docker.io/kennethreitz/httpbin
        imagePullPolicy: IfNotPresent
        name: httpbin
        ports:
        - containerPort: 80
                           

[root@k8s-master01 httpbin]# kubectl apply -f httpbin.yaml -n istio
serviceaccount/httpbin created
service/httpbin created
deployment.apps/httpbin created
[root@k8s-master01 httpbin]#
[root@k8s-master01 httpbin]#
二：配置断路器

1.当调用httpbin服务时，创建destination rule去应用断路器。