Canary Deployment with kustomization in Argo CD

kustomization.yaml

apiVersion: kustomize.config.k8s.io/v1beta1
kind: Kustomization

resources:
  - bluegreen.yaml
  - ingress.yaml

alb-ingress.yaml

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: canary-ingress
  annotations:
    alb.ingress.kubernetes.io/certificate-arn: <ACM arn>
    alb.ingress.kubernetes.io/healthcheck-path: /
    alb.ingress.kubernetes.io/scheme: internet-facing
    alb.ingress.kubernetes.io/healthcheck-protocol: HTTP
    alb.ingress.kubernetes.io/listen-ports: '[{"HTTPS":443}, {"HTTP": 80}]'
    alb.ingress.kubernetes.io/target-type: ip
    kubernetes.io/ingress.class: alb
  labels:
    app: canary-ingress
spec:
  rules:
    - http:
        paths:
          - path: /*
            backend:
              serviceName: canary-service
              servicePort: 80

canary.yaml

apiVersion: argoproj.io/v1alpha1
kind: Rollout
metadata:
  name: canary-rollout
spec:
  replicas: 3
  revisionHistoryLimit: 2
  selector:
    matchLabels:
      app: canary
  template:
    metadata:
      labels:
        app: canary
    spec:
      containers:
      - name: canary-rollouts-demo
        image: particule/simplecolorapi:1.0
        imagePullPolicy: Always
        ports:
        - containerPort: 5000
  # 이 부분에서 카나리로 지정
  strategy:
    canary:
      maxSurge: "25%"
      maxUnavailable: 0
      steps:
      - setWeight: 25
      - pause: { duration: 30 }
---
kind: Service
apiVersion: v1
metadata:
  name: canary-service
spec:
  selector:
    app: canary
  ports:
  - protocol: TCP
    port: 80
    targetPort: 5000
    nodePort: 30081
  type: NodePort

remark

maxSurge # canary 배포로 생성할 pod의 비율

maxUnavailable # 업데이트 될 때 사용할 수 없는 pod의 최대 수

setWeight # 카나리로 배포된 서버로 전송해야될 트래픽 비율

pause: {} # AutoPromotion Time

- pause: { duration: 30 }  # 30초
- pause: { duration: 30s } # 30초
- pause: { duration: 30m } # 30분
- pause: { duration: 30h } # 30시간
- pause: {}                # Auto Promotion 옵션 비활성화
- pause: { duration: -10 } # 잘못된 옵션