rollout更新策略bluegreen

部署一个示例

[root@master 08-argo-rollouts]# kubectl apply -f 05-argo-rollouts-bluegreen-demo.yaml 
rollout.argoproj.io/rollout-helloworld-bluegreen configured
service/spring-boot-helloworld unchanged
service/spring-boot-helloworld-preview unchanged
[root@master 08-argo-rollouts]# cat 05-argo-rollouts-bluegreen-demo.yaml 
apiVersion: argoproj.io/v1alpha1
kind: Rollout
metadata:
  name: rollout-helloworld-bluegreen
spec:
  replicas: 3
  revisionHistoryLimit: 5
  selector:
    matchLabels:
      app: rollout-helloworld-bluegreen
  template:
    metadata:
      labels:
        app: rollout-helloworld-bluegreen
    spec:
      containers:
      - name: spring-boot-helloworld
        image: ikubernetes/spring-boot-helloworld:v0.9.2
        ports:
        - containerPort: 80
  strategy:
    blueGreen: 
      activeService: spring-boot-helloworld
      previewService: spring-boot-helloworld-preview
      autoPromotionEnabled: false
---
kind: Service
apiVersion: v1
metadata:
  name: spring-boot-helloworld
spec:
  selector:
    app: rollout-helloworld-bluegreen
  ports:
  - protocol: TCP
    port: 80
    targetPort: 80

---
kind: Service
apiVersion: v1
metadata:
  name: spring-boot-helloworld-preview
spec:
  selector:
    app: rollout-helloworld-bluegreen
  ports:
  - protocol: TCP
    port: 80
    targetPort: 80

更新一下镜像版本

[root@master 08-argo-rollouts]# vim 05-argo-rollouts-bluegreen-demo.yaml 
    spec:
      containers:
      - name: spring-boot-helloworld
        image: ikubernetes/spring-boot-helloworld:v0.9.3
        ports:
        - containerPort: 80
        
[root@master 08-argo-rollouts]# kubectl apply -f 05-argo-rollouts-bluegreen-demo.yaml 

也可以回滚

版本又变成了0.9.2

在Blue-Green部署上使用analysis

[root@master 08-argo-rollouts]# kubectl apply -f 06-argo-rollouts-bluegreen-with-analysis.yaml
[root@master 08-argo-rollouts]# cat 06-argo-rollouts-bluegreen-with-analysis.yaml 
# CopyRight: MageEdu <http://www.magedu.com>
---
apiVersion: argoproj.io/v1alpha1
kind: AnalysisTemplate
metadata:
  name: success-rate
spec:
  args:
  - name: service-name
  metrics:
  - name: success-rate
    successCondition: result[0] >= 0.95
    interval: 20s 
    count: 5
    failureLimit: 5
    provider:
      prometheus:
        address: http://prometheus.istio-system.svc.cluster.local:9090
        query: |
          sum(irate(
            istio_requests_total{reporter="source",destination_service=~"{{args.service-name}}",response_code!~"5.*"}[1m]
          )) / 
          sum(irate(
            istio_requests_total{reporter="source",destination_service=~"{{args.service-name}}"}[1m]
          ))
---
apiVersion: argoproj.io/v1alpha1
kind: Rollout
metadata:
  name: rollout-helloworld-bluegreen-with-analysis
spec:
  replicas: 3
  revisionHistoryLimit: 5
  selector:
    matchLabels:
      app: rollout-helloworld-bluegreen
  template:
    metadata:
      labels:
        app: rollout-helloworld-bluegreen
    spec:
      containers:
      - name: spring-boot-helloworld
        image: ikubernetes/spring-boot-helloworld:v0.9.5
        ports:
        - containerPort: 80
  strategy:
    blueGreen: 
      activeService: spring-boot-helloworld
      previewService: spring-boot-helloworld-preview
      prePromotionAnalysis: 
        templates:
        - templateName: success-rate
        args:
        - name: service-name
          value: spring-boot-helloworld.default.svc.cluster.local
      postPromotionAnalysis:
        templates:
        - templateName: success-rate
        args:
        - name: service-name
          value: spring-boot-helloworld.default.svc.cluster.local
      autoPromotionEnabled: true
---
kind: Service
apiVersion: v1
metadata:
  name: spring-boot-helloworld
spec:
  selector:
    app: rollout-helloworld-bluegreen
  ports:
  - protocol: TCP
    port: 80
    targetPort: 80
---
kind: Service
apiVersion: v1
metadata:
  name: spring-boot-helloworld-preview
spec:
  selector:
    app: rollout-helloworld-bluegreen
  ports:
  - protocol: TCP
    port: 80
    targetPort: 80