6.5.3. Deploying the Spring PetClinic sample application

Procedure

1. Deploy the spring-petclinic application with the PostgresCluster custom resource (CR) by running the following command in shell:

   $ oc apply -n my-petclinic -f - << EOD
   ---
   apiVersion: apps/v1
   kind: Deployment
   metadata:
     name: spring-petclinic
     labels:
       app: spring-petclinic
   spec:
     replicas: 1
     selector:
       matchLabels:
         app: spring-petclinic
     template:
       metadata:
         labels:
           app: spring-petclinic
       spec:
         containers:
           - name: app
             image: quay.io/service-binding/spring-petclinic:latest
             imagePullPolicy: Always
             env:
             - name: SPRING_PROFILES_ACTIVE
               value: postgres
             - name: org.springframework.cloud.bindings.boot.enable
               value: "true"
             ports:
             - name: http
               containerPort: 8080
   ---
   apiVersion: v1
   kind: Service
   metadata:
     labels:
       app: spring-petclinic
     name: spring-petclinic
   spec:
     type: NodePort
     ports:
       - port: 80
         protocol: TCP
         targetPort: 8080
     selector:
       app: spring-petclinic
   EOD

   The output verifies that the Spring PetClinic sample application is created and deployed:

   Example output

   deployment.apps/spring-petclinic created
   service/spring-petclinic created

   참고

   If you are deploying the application using Container images in the Developer perspective of the web console, you must enter the following environment variables under the Deployment section of the Advanced options:

   • Name: SPRING_PROFILES_ACTIVE
   • Value: postgres

2. Verify that the application is not yet connected to the database service by running the following command:

   $ oc get pods -n my-petclinic

   It takes take a few minutes until the CrashLoopBackOff status is displayed:

   Example output

   NAME                                READY   STATUS             RESTARTS      AGE
   spring-petclinic-5b4c7999d4-wzdtz   0/1     CrashLoopBackOff   4 (13s ago)   2m25s

   At this stage, the pod fails to start. If you try to interact with the application, it returns errors.