Add support for generating knative manifests using the kubernetes extension.

bom/runtime/pom.xml

@@ -139,7 +139,7 @@
         <awssdk.version>2.10.3</awssdk.version>
         <azure-functions-java-library.version>1.3.0</azure-functions-java-library.version>
         <kotlin.version>1.3.41</kotlin.version>
-        <dekorate.version>0.9.4</dekorate.version>
+        <dekorate.version>0.9.9</dekorate.version>
         <maven-artifact-transfer.version>0.10.0</maven-artifact-transfer.version>
         <jline.version>2.14.6</jline.version>
         <maven-invoker.version>3.0.1</maven-invoker.version>
@@ -739,7 +739,12 @@
                 <version>${dekorate.version}</version>
                 <classifier>noapt</classifier>
             </dependency>
-
+            <dependency>
+                <groupId>io.dekorate</groupId>
+                <artifactId>knative-annotations</artifactId>
+                <version>${dekorate.version}</version>
+                <classifier>noapt</classifier>
+            </dependency>
             <dependency>
                 <groupId>org.jboss.logging</groupId>
                 <artifactId>jboss-logging</artifactId>

docs/src/main/asciidoc/kubernetes.adoc

@@ -459,3 +459,88 @@ The OpenShift resources can be customized in a similar approach with Kubernetes.
 | s2i.auto-push-enabled | boolean |   | false 
 | s2i.auto-build-enabled | boolean |   | false 
 |====
+
+=== Knative
+
+To enable the generation of Knative resources, you need to include Knative in the target platforms:
+
+[source]
+----
+kubernetes.deployment.target=knative
+----
+
+Following the execution of `./mvnw package` you will notice amongst the other files that are created, two files named
+`knative.json` and `knative.yml` in the `target/kubernetes/` directory.
+
+If you look at either file you will see that it contains a Knative `Service`.
+
+The full source of the `knative.json` file looks something like this:
+
+[source,json]
+----
+{
+  "apiVersion" : "v1",
+  "kind" : "List",
+  "items" : [ {
+    "apiVersion" : "serving.knative.dev/v1alpha1",
+    "kind" : "Service",
+    "metadata" : {
+      "labels" : {
+        "app" : "test-quarkus-app",
+        "version" : "0.1-SNAPSHOT",
+        "group" : "yourDockerUsername"
+      },
+      "name" : "knative"
+    },
+    "spec" : {
+      "runLatest" : {
+        "configuration" : {
+          "revisionTemplate" : {
+            "spec" : {
+              "container" : {
+                "image" : "dev.local/yourDockerUsername/test-quarkus-app:1.0-SNAPSHOT",
+                "imagePullPolicy" : "IfNotPresent"
+              }
+            }
+          }
+        }
+      }
+    }
+  } ]
+}
+----
+
+The generated service can be customized using the following properties:
+
+.Knative
+|====
+| Property | Type | Description | Default Value 
+| knative.group | String |   |  
+| knative.name | String |   |  
+| knative.version | String |   |  
+| knative.labels | Label[] |   |  
+| knative.annotations | Annotation[] |   |  
+| knative.env-vars | Env[] |   |  
+| knative.working-dir | String |   |  
+| knative.command | String[] |   |  
+| knative.arguments | String[] |   |  
+| knative.service-account | String |   |  
+| knative.host | String |   |  
+| knative.ports | Port[] |   |  
+| knative.service-type | ServiceType |   | ClusterIP 
+| knative.pvc-volumes | PersistentVolumeClaimVolume[] |   |  
+| knative.secret-volumes | SecretVolume[] |   |  
+| knative.config-map-volumes | ConfigMapVolume[] |   |  
+| knative.git-repo-volumes | GitRepoVolume[] |   |  
+| knative.aws-elastic-block-store-volumes | AwsElasticBlockStoreVolume[] |   |  
+| knative.azure-disk-volumes | AzureDiskVolume[] |   |  
+| knative.azure-file-volumes | AzureFileVolume[] |   |  
+| knative.mounts | Mount[] |   |  
+| knative.image-pull-policy | ImagePullPolicy |   | IfNotPresent 
+| knative.image-pull-secrets | String[] |   |  
+| knative.liveness-probe | Probe |   | ( see Probe ) 
+| knative.readiness-probe | Probe |   | ( see Probe ) 
+| knative.sidecars | Container[] |   |  
+| knative.expose | boolean |   | false 
+| knative.auto-deploy-enabled | boolean |   | false 
+|====

extensions/kubernetes/deployment/pom.xml

@@ -47,6 +47,21 @@
                 </exclusion>
             </exclusions>
         </dependency>
+        <dependency>
+            <groupId>io.dekorate</groupId>
+            <artifactId>knative-annotations</artifactId>
+            <classifier>noapt</classifier>
+            <exclusions>
+                <exclusion>
+                    <groupId>io.sundr</groupId>
+                    <artifactId>*</artifactId>
+                </exclusion>
+                <exclusion>
+                    <groupId>com.sun</groupId>
+                    <artifactId>tools</artifactId>
+                </exclusion>
+            </exclusions>
+        </dependency>
     </dependencies>
 
     <build>

integration-tests/kubernetes/pom.xml

@@ -30,6 +30,11 @@
       <artifactId>openshift-annotations</artifactId>
       <classifier>noapt</classifier>
     </dependency>
+    <dependency>
+      <groupId>io.dekorate</groupId>
+      <artifactId>knative-annotations</artifactId>
+      <classifier>noapt</classifier>
+    </dependency>
   </dependencies>
   <build>
     <resources>

integration-tests/kubernetes/src/it/knative/pom.xml

@@ -0,0 +1,117 @@
+<?xml version="1.0"?>
+<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
+  <modelVersion>4.0.0</modelVersion>
+  <groupId>org.acme</groupId>
+  <artifactId>knative</artifactId>
+  <version>0.1-SNAPSHOT</version>
+  <properties>
+    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
+    <surefire-plugin.version>2.22.0</surefire-plugin.version>
+    <maven.compiler.source>1.8</maven.compiler.source>
+    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    <maven.compiler.target>1.8</maven.compiler.target>
+  </properties>
+  <dependencyManagement>
+    <dependencies>
+      <dependency>
+        <groupId>io.quarkus</groupId>
+        <artifactId>quarkus-bom</artifactId>
+        <version>@project.version@</version>
+        <type>pom</type>
+        <scope>import</scope>
+      </dependency>
+    </dependencies>
+  </dependencyManagement>
+  <dependencies>
+    <dependency>
+      <groupId>io.quarkus</groupId>
+      <artifactId>quarkus-resteasy</artifactId>
+    </dependency>
+    <dependency>
+      <groupId>io.quarkus</groupId>
+      <artifactId>quarkus-kubernetes</artifactId>
+    </dependency>
+    <dependency>
+      <groupId>io.quarkus</groupId>
+      <artifactId>quarkus-junit5</artifactId>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>io.rest-assured</groupId>
+      <artifactId>rest-assured</artifactId>
+      <scope>test</scope>
+    </dependency>
+  </dependencies>
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>io.quarkus</groupId>
+        <artifactId>quarkus-maven-plugin</artifactId>
+        <version>@project.version@</version>
+        <executions>
+          <execution>
+            <goals>
+              <goal>build</goal>
+            </goals>
+          </execution>
+        </executions>
+      </plugin>
+      <plugin>
+        <artifactId>maven-surefire-plugin</artifactId>
+        <version>${surefire-plugin.version}</version>
+        <configuration>
+          <systemProperties>
+            <java.util.logging.manager>org.jboss.logmanager.LogManager</java.util.logging.manager>
+          </systemProperties>
+        </configuration>
+      </plugin>
+    </plugins>
+  </build>
+  <profiles>
+    <profile>
+      <id>native</id>
+      <activation>
+        <property>
+          <name>native</name>
+        </property>
+      </activation>
+      <build>
+        <plugins>
+          <plugin>
+            <groupId>io.quarkus</groupId>
+            <artifactId>quarkus-maven-plugin</artifactId>
+            <version>@project.version@</version>
+            <executions>
+              <execution>
+                <goals>
+                  <goal>native-image</goal>
+                </goals>
+                <configuration>
+                  <enableHttpUrlHandler>true</enableHttpUrlHandler>
+                </configuration>
+              </execution>
+            </executions>
+          </plugin>
+          <plugin>
+            <artifactId>maven-failsafe-plugin</artifactId>
+            <version>${surefire-plugin.version}</version>
+            <executions>
+              <execution>
+                <goals>
+                  <goal>integration-test</goal>
+                  <goal>verify</goal>
+                </goals>
+                <configuration>
+                  <systemProperties>
+                    <native.image.path>${project.build.directory}/${project.build.finalName}-runner</native.image.path>
+                  </systemProperties>
+                </configuration>
+              </execution>
+            </executions>
+          </plugin>
+        </plugins>
+      </build>
+    </profile>
+  </profiles>
+</project>

integration-tests/kubernetes/src/it/knative/src/main/docker/Dockerfile.jvm

@@ -0,0 +1,22 @@
+####
+# This Dockerfile is used in order to build a container that runs the Quarkus application in JVM mode
+#
+# Before building the docker image run:
+#
+# mvn package
+#
+# Then, build the image with:
+#
+# docker build -f src/main/docker/Dockerfile.jvm -t quarkus/kubernetes-jvm .
+#
+# Then run the container using:
+#
+# docker run -i --rm -p 8080:8080 quarkus/kubernetes-jvm
+#
+###
+FROM fabric8/java-alpine-openjdk8-jre
+ENV JAVA_OPTIONS="-Dquarkus.http.host=0.0.0.0 -Djava.util.logging.manager=org.jboss.logmanager.LogManager"
+ENV AB_ENABLED=jmx_exporter
+COPY target/lib/* /deployments/lib/
+COPY target/*-runner.jar /deployments/app.jar
+ENTRYPOINT [ "/deployments/run-java.sh" ]

integration-tests/kubernetes/src/it/knative/src/main/docker/Dockerfile.native

@@ -0,0 +1,22 @@
+####
+# This Dockerfile is used in order to build a container that runs the Quarkus application in native (no JVM) mode
+#
+# Before building the docker image run:
+#
+# mvn package -Pnative -Dnative-image.docker-build=true
+#
+# Then, build the image with:
+#
+# docker build -f src/main/docker/Dockerfile.native -t quarkus/kubernetes .
+#
+# Then run the container using:
+#
+# docker run -i --rm -p 8080:8080 quarkus/kubernetes
+#
+###
+FROM registry.access.redhat.com/ubi8/ubi-minimal
+WORKDIR /work/
+COPY target/*-runner /work/application
+RUN chmod 775 /work
+EXPOSE 8080
+CMD ["./application", "-Dquarkus.http.host=0.0.0.0"]

integration-tests/kubernetes/src/it/knative/src/main/java/org/acme/Hello.java

@@ -0,0 +1,16 @@
+package org.acme;
+
+import javax.ws.rs.GET;
+import javax.ws.rs.Path;
+import javax.ws.rs.Produces;
+import javax.ws.rs.core.MediaType;
+
+@Path("/hello")
+public class Hello {
+
+    @GET
+    @Produces(MediaType.TEXT_PLAIN)
+    public String hello() {
+        return "hello";
+    }
+}