argo-rollout使用--金丝雀结合ingress-nginx

1.金丝雀发布流程，安装比例发布，又名灰度发布

举例：共10pod

• 第一批发布 30%

• V1 : 10个Pod
• V2: 3个Pod

• 第二批发布 60%

• V1 : 10个Pod
• V2: 6个Pod

• 第三批发布 100%

• V1 : 10个Pod
• V2: 10个Pod

• 第四批发布

• V2: 10个Pod (active)
• V1: 0个Pod 

2.资源文件准备

文件放到：https://gitee.com/arionyu/k8syaml.git 

目录：argo/argo-rollout/金丝雀部署/ingresstest

ingress创建

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: demo-stable-ingress
  namespace: argo-rollouts
  annotations:
    kubernetes.io/ingress.class: nginx
    acme.cert-manager.io/http01-edit-in-place: "true"   #没有这个会导致All hosts are taken by other resources

spec:
  ingressClassName: nginx
  rules:
  - host: yuqiao.test.com
    http:
      paths:
      - backend:
          service:
            name: stable-service
            port:
              number: 80
        path: /
        pathType: Prefix

service创建

apiVersion: v1
kind: Service
metadata:
  name: rollout-bluegreen-active
  namespace: argo-rollouts
spec:
  ports:
  - nodePort: 30131
    port: 80
    protocol: TCP
    targetPort: 80
  selector:
    app: rollout-bluegreen
  sessionAffinity: None
  type: NodePort
---
apiVersion: v1
kind: Service
metadata:
  name: rollout-bluegreen-preview
  namespace: argo-rollouts
spec:
  ports:
  - nodePort: 30132
    port: 80
    protocol: TCP
    targetPort: 80
  selector:
    app: rollout-bluegreen
  sessionAffinity: None
  type: NodePort

rollout部署

apiVersion: argoproj.io/v1alpha1
kind: Rollout
metadata:
  name: simple-rollout
spec:
  replicas: 4
  strategy:
    canary:
      canaryService: canary-service  # required
      stableService: stable-service  # required
      trafficRouting:
        nginx:
          # Either stableIngress or stableIngresses must be configured, but not both.
          stableIngress: demo-stable-ingress
      steps:
      - setWeight: 30
      - pause: {}
      - setWeight: 60
      - pause: {}
      - setWeight: 100
      - pause: {}     
  revisionHistoryLimit: 2
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        # image: nginx:1.21.1
        image: registry.cn-hangzhou.aliyuncs.com/yushihao/nginx:latest
        ports:
        - name: http
          containerPort: 80
          protocol: TCP
      imagePullSecrets:
      - name: aliharbor