Istio - TrafficManagement - Retries

apiVersion: apps/v1
kind: Deployment
metadata:  labels:    app: nginx-deployment
  name: nginx-deployment
spec:  replicas: 1  selector:    matchLabels:      app: nginx-deployment
  strategy:    rollingUpdate:      maxSurge: 25%
      maxUnavailable: 25%
    type: RollingUpdate
  template:    metadata:      labels:        app: nginx-deployment
    spec:      containers:        - image: 'nginx:latest'          name: nginx-deployment
---apiVersion: apps/v1
kind: Deployment
metadata:  labels:    app: httpd-deployment
  name: httpd-deployment
spec:  replicas: 1  selector:    matchLabels:      app: httpd-deployment
  strategy:    rollingUpdate:      maxSurge: 25%
      maxUnavailable: 25%
    type: RollingUpdate
  template:    metadata:      labels:        app: httpd-deployment
    spec:      containers:        - image: 'httpd:latest'          name: httpd-deployment
---apiVersion: v1
kind: Service
metadata:  name: nginx-service
spec:  selector:    app: nginx-deployment
  type: ClusterIP
  ports:  - name: http
    port: 80    targetPort: 80    protocol: TCP
---apiVersion: v1
kind: Service
metadata:  name: httpd-service
spec:  selector:    app: httpd-deployment
  type: ClusterIP
  ports:  - name: http
    port: 80    targetPort: 80    protocol: TCP
---apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:  name: nginx-vs
spec:  hosts:  - nginx-service
  http:  - route:    - destination:        host: nginx-service
    retries:      attempts: 3      perTryTimeout: 5s
---apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:  name: httpd-vs
spec:  hosts:  - httpd-service
  http:  - fault:      abort:        percentage:           value: 100        httpStatus: 503    route:    - destination:        host: httpd-service
```
##### 配置 nginx 反向代理 httpd 以完成上下游调用的效果kubectl exec -it nginx-deployment-56c94b9957-xgw88 -- sh
tee /etc/nginx/conf.d/default.conf <<-'EOF'server {    listen 80;
    server_name localhost;
    location / {        proxy_pass http://httpd-service;
        proxy_http_version 1.1;
}}EOF
nginx -t ; nginx -s reload
##### 进入客户端容器测试```yaml
apiVersion: apps/v1
kind: Deployment
metadata:  labels:    app: client-deployment
  name: client-deployment
spec:  replicas: 1  selector:    matchLabels:      app: client-deployment
  strategy:    rollingUpdate:      maxSurge: 25%
      maxUnavailable: 25%
    type: RollingUpdate
  template:    metadata:      labels:        app: client-deployment
    spec:      containers:        - image: 'busybox:latest'          name: client-deployment
          command: ["/bin/sh","-c","sleep 3600"]