add private registry login for deplyoment

Jenkinsfile

@@ -43,6 +43,9 @@ pipeline {
             steps {
                 script {
                     withKubeConfig([credentialsId: 'k8s-credentials', serverUrl: 'https://7293fae4-4c9d-4629-bc82-262d0a2b8e3c.eu-central-2.linodelke.net']) {
+                        withCredentials([usernamePassword(credentialsId: 'docker-hub', passwordVariable: 'PASS', usernameVariable: 'USER')]) {
+                            sh "kubectl create secret docker-registry my-registry-key --docker-server=docker.io --docker-username=$USER --docker-password=$PASS"
+                        }
                         sh 'envsubst < kubernetes/deployment.yaml | kubectl apply -f -'
                     }
                 }

kubernetes/deployment.yaml

@@ -14,9 +14,12 @@ spec:
       labels:
         app: java-maven-app
     spec:
+      imagePullSecrets:
+        - name: my-registry-key
       containers:
       - name: java-maven-app
         image: nanajanashia/demo-app:$IMAGE_NAME
+        imagePullPolicy: Always
         ports:
         - containerPort: 8080