개요

• Kubernetes Manifist 파일을 작성하고, 어플리케이션을 배포해 볼 것입니다.

사전조건

• Kubernetes on Docker Desktop

배포할 환경 미리보기

Kubernetes 배포 파일 작성

• k8s-deploy.yml

  apiVersion: apps/v1
  kind: Deployment
  metadata:
    name: spring-demo
  spec:
    selector:
      matchLabels:
        app: spring-demo
    replicas: 3
    template:
      metadata:
        labels:
          app: spring-demo
      spec:
        containers:
        - name: spring-demo
          image: sooabia/spring-demo:1.0
          ports:
          - containerPort: 8080
  ---
  kind: Service
  apiVersion: v1
  metadata:
    name: spring-service
  spec:
    selector:
      app: spring-demo
    ports:
    - protocol: TCP
      port: 80
      targetPort: 8080
    type: LoadBalancer
  ---
    apiVersion: apps/v1
    kind: StatefulSet
    metadata:
      name: redis
    spec:
      selector:
        matchLabels:
          app: redis
  	serviceName: redis
      replicas: 1
      template:
        metadata:
          labels:
            app: redis
        spec:
          containers:
          - name: redis
            image: redis
            ports:
            - containerPort: 6379
            volumeMounts:
            - name: data
              mountPath: /data
      volumeClaimTemplates:
      - metadata:
          name: data
        spec:
          accessModes: [ "ReadWriteOnce" ]
          resources:
            requests:
             storage: 1Gi
  --- 
  kind: Service
  apiVersion: v1
  metadata:
    name: redis
  spec:
    selector:
      app: redis
    ports:
    - protocol: TCP
      port: 6379
      targetPort: 6379
    type: ClusterIP

배포

• C:\Users\sanse\workspace\reactive-link-shortener-sample-app>kubectl apply -f k8s-deploy.yml
  deployment.apps/spring-demo created
  service/spring-service created
  statefulset.apps/redis created
  service/redis created
  
  C:\Users\sanse\workspace\reactive-link-shortener-sample-app>kubectl get pod
  NAME                           READY   STATUS    RESTARTS   AGE
  redis-0                        1/1     Running   0          26s
  spring-demo-86db8bb845-6h4g8   1/1     Running   0          26s
  spring-demo-86db8bb845-qhmj4   1/1     Running   0          26s
  spring-demo-86db8bb845-x79cl   1/1     Running   0          26s
  
  C:\Users\sanse\workspace\reactive-link-shortener-sample-app>kubectl get svc
  NAME             TYPE           CLUSTER-IP       EXTERNAL-IP   PORT(S)        AGE
  kubernetes       ClusterIP      10.96.0.1        <none>        443/TCP        31d
  redis            ClusterIP      10.103.235.238   <none>        6379/TCP       41s
  spring-service   LoadBalancer   10.110.19.153    localhost     80:31834/TCP   41s

서비스 확인

• C:\Users\sanse\workspace\reactive-link-shortener-sample-app>curl -XPOST http://localhost/link -H "Content-Type: application/json" -d "{\"link\":\"http://wiki.iisanse.com\"}"
  {"shortenedLink":"zMlnfI"}