[OPENJDK-2992] Create DeploymentConfig and Route for jlink apps

templates/jlink/README.md

@@ -7,6 +7,8 @@ you need:
 2. UBI9 OpenJDK ImageStreams that include `jlink-dev` changes (see below)
 3. The template [jlinked-app.yaml](jlinked-app.yaml).
 
+DISCLAIMER: This template requires OpenShift to be able to resolve ImageStreams, as such it can only be used in projects where the openshift.io/run-level label set to 0 or 1. This means it cannot be used with default, kube-public, kube-system, openshift, openshift-infra, openshift-node, and other system-created projects.
+
 ## Stage 0: UBI9 OpenJDK ImageStreams with jlink-dev changes
 
 Until the `jlink-dev` work is merged, prior to trying out the template, we must first
@@ -16,29 +18,33 @@ prepare UBI9 OpenJDK ImageStreams with `jlink-dev` support.
    repository](https://github.com/jboss-container-images/openjdk),
    branch `jlink-dev`. e.g.
 
-        cekit --descriptor ubi9-openjdk-21.yaml build docker
+        cekit --descriptor ubi9-openjdk-21.yaml build podman
+
+2. Create an OpenShift project
+
+        oc new-project $PROJECT
 
-2. Within your OpenShift project,
+3. Within your OpenShift project,
 
-        oc create imagestream openjdk-${JDK_VERSION}-jlink-tech-preview
+        oc create imagestream openjdk-21-jlink-tech-preview
 
-3. You may need to configure your container engine to not TLS-verify the OpenShift
+4. You may need to configure your container engine to not TLS-verify the OpenShift
    registry. For Docker, add the following to `/etc/docker/daemon.json` and restart
    the daemon:
 
         {
           "insecure-registries": [ "default-route-openshift-image-registry.apps-crc.testing" ]
         }
 
-4. Log into the OpenShift registry, e.g.
+5. Log into the OpenShift registry, e.g.
 
         REGISTRY_AUTH_PREFERENCE=docker oc registry login
 
-5. tag and push the dev image into it. The OpenShift console gives you the
+6. tag and push the dev image into it. The OpenShift console gives you the
    exact URI for your instance
 
-        docker tag openjdk-tech-preview/openjdk-21-jlink-rhel9:latest default-route-openshift-image-registry.apps-crc.testing/jlink1/openjdk-21-jlink-tech-preview:latest
-        docker push default-route-openshift-image-registry.apps-crc.testing/jlink1/openjdk-21-jlink-tech-preview:latest
+        podman tag openjdk-tech-preview/openjdk-21-jlink-rhel9:latest default-route-openshift-image-registry.apps-crc.testing/$PROJECT/openjdk-21-jlink-tech-preview:latest
+        podman push default-route-openshift-image-registry.apps-crc.testing/$PROJECT/openjdk-21-jlink-tech-preview:latest
 
 ## Stage 1: Load the template into OpenShift and instantiate it
 
@@ -57,13 +63,17 @@ Some suitable test values for the parameters are
  * REF: master
  * CONTEXT_DIR: quarkus-quickstarts/getting-started-3.9.2-uberjar
  * APPNAME: quarkus-quickstart
+ * TARGET_PORT: 8080
+ * SERVICE_PORT: 8080
 
         oc process \
             -p JDK_VERSION=21 \
             -p APP_URI=https://github.com/jboss-container-images/openjdk-test-applications \
             -p REF=master \
             -p CONTEXT_DIR=quarkus-quickstarts/getting-started-3.9.2-uberjar \
             -p APPNAME=quarkus-quickstart \
+            -p TARGET_PORT=8080 \
+            -p SERVICE_PORT=8080 \
             templates/jlink-app-template \
             | oc create -f -
 

templates/jlink/jlinked-app.yaml

@@ -10,7 +10,7 @@ metadata:
 parameters:
 - description: JDK version to produce a jmods image and imagestream for
   name: JDK_VERSION
-  value: "11"
+  value: "21"
   required: true
 - description: OpenJDK builder image version tag
   name: BUILDER_IMAGE_TAG
@@ -32,6 +32,14 @@ parameters:
   generate: expression
   from: "[a-zA-Z0-9]{16}"
   required: true
+- description: Target port for the created Route
+  name: TARGET_PORT
+  value: "8080"
+  required: true
+- description: Port for the created Service to listen on
+  name: SERVICE_PORT
+  value: "8181"
+  required: true
 message: "... The GitHub webhook secret is ${GITHUB_WEBHOOK_SECRET} ..."
 ##############################################################################
 # Following are the objects(imagestream and buildconfigs) for all the 3-stages
@@ -96,6 +104,9 @@ objects:
   kind: ImageStream
   metadata:
     name: ${APPNAME}-intermediate
+    labels:
+      app: ${APPNAME}
+      app.kubernetes.io/part-of: ${APPNAME}
   spec:
     lookupPolicy:
       local: false
@@ -171,7 +182,8 @@ objects:
       app.kubernetes.io/part-of: ${APPNAME}
   spec:
     lookupPolicy:
-      local: false
+      # Must be true for the Deployment to resolve the ImageStream
+      local: true
 ##############################################################################
 # stage-3: BuildConfig
 - apiVersion: build.openshift.io/v1
@@ -233,3 +245,64 @@ objects:
           from:
             kind: ImageStreamTag
             name: ${APPNAME}-ubimicro:latest  # ImageStreamTag for registry.access.redhat.com/ubi9/ubi-micro
+##############################################################################
+# DeploymentConfig and Route object specs
+# DeploymentConfigs are discouraged, however the documentation sugggests to still
+# use them if features are missing from Deployments, which in our case they are.
+- apiVersion: apps/v1
+  kind: Deployment
+  metadata:
+    name: ${APPNAME}-jlinked-app-deployment
+    labels:
+      app: ${APPNAME}
+      app.kubernetes.io/part-of: ${APPNAME}
+  spec:
+    replicas: 1
+    selector:
+      matchLabels:
+        app: ${APPNAME}
+    template:
+      metadata:
+        labels:
+          app: ${APPNAME}
+          app.kubernetes.io/part-of: ${APPNAME}
+        annotations:
+          # Allows Deployments to use ImageStreams
+          alpha.image.policy.openshift.io/resolve-names: '*'
+      spec:
+        containers:
+          - name: ${APPNAME}-jlinked-app-container
+            image: ${APPNAME}-lightweight-image:latest
+            ports:
+              - containerPort: ${{TARGET_PORT}}
+                protocol: TCP
+    strategy:
+      type: RollingUpdate
+- apiVersion: v1
+  kind: Service
+  metadata:
+    name: ${APPNAME}-jlinked-app-service
+    labels:
+      app: ${APPNAME}
+      app.kubernetes.io/part-of: ${APPNAME}
+  spec:
+    selector:
+      app: ${APPNAME}
+    ports:
+      - protocol: TCP
+        name: target-${TARGET_PORT}-tcp
+        port: ${{SERVICE_PORT}}
+        targetPort: ${{TARGET_PORT}}
+- apiVersion: route.openshift.io/v1
+  kind: Route
+  metadata:
+    name: ${APPNAME}-jlinked-app-route
+    labels:
+      app: ${APPNAME}
+      app.kubernetes.io/part-of: ${APPNAME}
+  spec:
+    to:
+      kind: Service
+      name: ${APPNAME}-jlinked-app-service
+    port:
+      targetPort: ${{TARGET_PORT}}