Istio, kiali를 이용한 canary배포 sample

이미지 만들기 참고 블로그

버전 1번은 V1가 나오게 하고, 버전 2번은 V2가 나오게 만들었다.
일단 deploy를 두개, svc를 한개를 만들어두자

apiVersion: v1
kind: Namespace
metadata:
  creationTimestamp: null
  name: test
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: hello-server-v1
  namespace: test
  labels:
    app: hello
    version: v1
spec:
  replicas: 1
  selector:
    matchLabels:
      app: hello
      version: v1
  template:
    metadata:
      labels:
        app: hello
        version: v1
    spec:
      containers:
      - image: ${자신 ecrd이미지}:v1
        imagePullPolicy: IfNotPresent
        name: hello-server-v1
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: hello-server-v2
  labels:
    app: hello
    version: v2
spec:
  replicas: 1
  selector:
    matchLabels:
      app: hello
      version: v2
  template:
    metadata:
      labels:
        app: hello
        version: v2
    spec:
      containers:
      - image: ${자신 이미지ecr위치}:v2
        imagePullPolicy: IfNotPresent
        name: hello-server-v2
---
apiVersion: v1
kind: Service
metadata:
  name: svc-hello
  namespace: test
  labels:
    app: hello
spec:
  selector:
    app: hello
  ports:
  - name: http
    protocol: TCP
    port: 5000

Destination룰을 생성한다
subnets:v1은 version: v1 라벨이 달린 pod로 갈것이고, subnets:v2는 version: v2 라벨이 달린 pod로 갈것이당.

apiVersion: networking.istio.io/v1alpha3
kind: DestinationRule
metadata:
  name: dr-hello
  namespace: test
spec:
  host: svc-hello.test.svc.cluster.local
  subsets:
  - name: v1
    labels:
      version: v1
  - name: v2
    labels:
      version: v2

VirtualService를 이용해서 weight를 조절한다.

apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
  name: vs-hello
  namespace: test
spec:
  hosts:
    - svc-hello.test.svc.cluster.local
  http:
  - route:
    - destination:
        host: svc-hello.test.svc.cluster.local
        subset: v1
      weight: 100
    - destination:
        host: svc-hello.test.svc.cluster.local
        subset: v2
      weight: 0

pod에서 호출하면서 확인한다.

while true; do curl http://svc-hello.test.svc.cluster.local:5000; sleep 1; done

VirtualService를 이용해서 weight를 조절한다.

apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
  name: vs-hello
  namespace: test
spec:
  hosts:
    - svc-hello.test.svc.cluster.local
  http:
  - route:
    - destination:
        host: svc-hello.test.svc.cluster.local
        subset: v1
      weight: 60
    - destination:
        host: svc-hello.test.svc.cluster.local
        subset: v2
      weight: 40

VirtualService를 이용해서 weight를 조절한다.

apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
  name: vs-hello
  namespace: test
spec:
  hosts:
    - svc-hello.test.svc.cluster.local
  http:
  - route:
    - destination:
        host: svc-hello.test.svc.cluster.local
        subset: v1
      weight: 0
    - destination:
        host: svc-hello.test.svc.cluster.local
        subset: v2
      weight: 100

점점 이동하는 것을 볼수있음.

결과적으로 v2만 남게된다.