9、istio配置redirect-and-rewrite

1、demoappv10

---
apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    app: demoappv10
    version: v1.0
  name: demoappv10
spec:
  progressDeadlineSeconds: 600
  replicas: 3
  selector:
    matchLabels:
      app: demoapp
      version: v1.0
  template:
    metadata:
      labels:
        app: demoapp
        version: v1.0
    spec:
      containers:
      - image: ikubernetes/demoapp:v1.0
        imagePullPolicy: IfNotPresent
        name: demoapp
        env:
        - name: "PORT"
          value: "8080"
        ports:
        - containerPort: 8080
          name: web
          protocol: TCP

2、demoappv11

---
apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    app: demoappv11
    version: v1.1
  name: demoappv11
spec:
  progressDeadlineSeconds: 600
  replicas: 2
  selector:
    matchLabels:
      app: demoapp
      version: v1.1
  template:
    metadata:
      labels:
        app: demoapp
        version: v1.1
    spec:
      containers:
      - image: registry.cn-shenzhen.aliyuncs.com/lavamusic/public:demoapp-v1.1
        imagePullPolicy: IfNotPresent
        name: demoapp
        env:
        - name: "PORT"
          value: "8080"
        ports:
        - containerPort: 8080
          name: web
          protocol: TCP
        resources:
          limits:
            cpu: 50m

3、配置service

---
apiVersion: v1
kind: Service
metadata:
  name: demoapp
spec:
  ports:
    - name: http
      port: 8080
      protocol: TCP
      targetPort: 8080
  selector:
    app: demoapp
  type: ClusterIP

4、配置proxy

apiVersion: apps/v1
kind: Deployment
metadata:
  name: proxy
spec:
  progressDeadlineSeconds: 600
  replicas: 1
  selector:
    matchLabels:
      app: proxy
  template:
    metadata:
      labels:
        app: proxy
    spec:
      containers:
        - env:
          - name: PROXYURL
            value: http://demoapp:8080
          image: registry.cn-shenzhen.aliyuncs.com/lavamusic/public:proxy-v0.1.1
          imagePullPolicy: IfNotPresent
          name: proxy
          ports:
            - containerPort: 8080
              name: web
              protocol: TCP
          resources:
            limits:
              cpu: 50m
---
apiVersion: v1
kind: Service
metadata:
  name: proxy
spec:
  ports:
    - name: http-80
      port: 80
      protocol: TCP
      targetPort: 8080
  selector:
    app: proxy
---

5、配置dr

apiVersion: networking.istio.io/v1beta1
kind: DestinationRule
metadata:
  name: demoapp
spec:
  host: demoapp
  subsets:
  - name: v10
    labels:
      version: v1.0
  - name: v11
    labels:
      version: v1.1

6、配置backend

---
apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    app: backend
    version: v3.6
  name: backendv36
spec:
  progressDeadlineSeconds: 600
  replicas: 2
  selector:
    matchLabels:
      app: backend
      version: v3.6
  template:
    metadata:
      creationTimestamp: null
      labels:
        app: backend
        version: v3.6
    spec:
      containers:
      - image: ikubernetes/gowebserver:v0.1.0
        imagePullPolicy: IfNotPresent
        name: gowebserver
        env:
        - name: "SERVICE_NAME"
          value: "backend"
        - name: "SERVICE_PORT"
          value: "8082"
        - name: "SERVICE_VERSION"
          value: "v3.6"
        ports:
        - containerPort: 8082
          name: web
          protocol: TCP
        resources:
          limits:
            cpu: 50m
---
apiVersion: v1
kind: Service
metadata:
  name: backend
spec:
  ports:
    - name: http-web
      port: 8082
      protocol: TCP
      targetPort: 8082
  selector:
    app: backend
    version: v3.6
---

7、配置vs-demoapp

apiVersion: networking.istio.io/v1beta1
kind: VirtualService
metadata:
  name: demoapp
spec:
  hosts:
  - demoapp
  http:
  - name: rewrite
    match:
    - uri:
        prefix: /canary
    rewrite:
      uri: /
    route:
    - destination:
        host: demoapp
        subset: v11
  #- name: redirect
  #  match:
  #  - uri:
  #      prefix: "/backend"
  #  redirect:
  #    uri: /
  #    authority: backend
  #    port: 8082
  - name: default
    route:
    - destination:
        host: demoapp
        subset: v10

8、配置vs-proxy

apiVersion: networking.istio.io/v1beta1
kind: VirtualService
metadata:
  name: proxy
spec:
  hosts:
  - proxy
  http:
  - name: redirect
    match:
    - uri:
        prefix: "/backend"
    redirect:
      uri: /
      authority: backend
      port: 8082
  - name: default
    route:
    - destination:
        host: proxy

9、测试

[root@k8s-uat-manager ~]# kubectl exec -it sleep-69cfb4968f-2k674 -- sh
/ $ curl -I http://proxy/backend
HTTP/1.1 301 Moved Permanently
location: http://backend:8082/
date: Thu, 13 Jul 2023 15:02:47 GMT
server: envoy
transfer-encoding: chunked

/ $ while true;do curl http://proxy/canary;sleep 0.001;done

10、测试

/ $ while true;do curl http://proxy;sleep 0.001;done