Fallback specialized kubernetes config to vanilla kubernetes

extensions/kubernetes/openshift/deployment/pom.xml

@@ -49,6 +49,11 @@
             <artifactId>quarkus-junit5-internal</artifactId>
             <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>io.smallrye.config</groupId>
+            <artifactId>smallrye-config-source-yaml</artifactId>
+            <scope>test</scope>
+        </dependency>
     </dependencies>
 
     <build>

extensions/kubernetes/openshift/deployment/src/test/java/io/quarkus/openshift/deployment/config/OpenshiftConfigFallbackTest.java

@@ -0,0 +1,47 @@
+package io.quarkus.openshift.deployment.config;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNull;
+
+import java.nio.file.Path;
+
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.RegisterExtension;
+
+import io.quarkus.test.ProdBuildResults;
+import io.quarkus.test.ProdModeTestResults;
+import io.quarkus.test.QuarkusProdModeTest;
+import io.smallrye.config.source.yaml.YamlConfigSource;
+
+public class OpenshiftConfigFallbackTest {
+    @RegisterExtension
+    static final QuarkusProdModeTest TEST = new QuarkusProdModeTest()
+            .setApplicationName("config")
+            .setApplicationVersion("0.1-SNAPSHOT")
+            .overrideConfigKey("quarkus.kubernetes.replicas", "10")
+            .overrideConfigKey("quarkus.openshift.version", "999-SNAPSHOT")
+            .overrideConfigKey("quarkus.openshift.labels.app", "openshift")
+            .setRun(true);
+
+    @ProdBuildResults
+    private ProdModeTestResults prodModeTestResults;
+
+    @Test
+    void configFallback() throws Exception {
+        Path kubernetesDir = prodModeTestResults.getBuildDir().resolve("kubernetes");
+        YamlConfigSource kubernetes = new YamlConfigSource(kubernetesDir.resolve("kubernetes.yml").toUri().toURL());
+        YamlConfigSource openshift = new YamlConfigSource(kubernetesDir.resolve("openshift.yml").toUri().toURL());
+
+        // Only in Kubernetes, must fallback to Openshift
+        assertEquals("10", kubernetes.getValue("spec.replicas"));
+        assertEquals("10", openshift.getValue("spec.replicas"));
+
+        // In both, each should retain the value
+        assertEquals("0.1-SNAPSHOT", kubernetes.getValue("spec.template.metadata.labels.\"app.kubernetes.io/version\""));
+        assertEquals("999-SNAPSHOT", openshift.getValue("spec.template.metadata.labels.\"app.kubernetes.io/version\""));
+
+        // Only in Openshift
+        assertNull(kubernetes.getValue("spec.template.metadata.labels.app"));
+        assertEquals("openshift", openshift.getValue("spec.template.metadata.labels.app"));
+    }
+}

extensions/kubernetes/vanilla/deployment/src/main/java/io/quarkus/kubernetes/deployment/OpenshiftProcessor.java

@@ -40,7 +40,6 @@
 import io.quarkus.container.image.deployment.ContainerImageConfig;
 import io.quarkus.container.image.deployment.util.ImageUtil;
 import io.quarkus.container.spi.BaseImageInfoBuildItem;
-import io.quarkus.container.spi.ContainerImageCustomNameBuildItem;
 import io.quarkus.container.spi.ContainerImageInfoBuildItem;
 import io.quarkus.container.spi.ContainerImageLabelBuildItem;
 import io.quarkus.container.spi.FallbackContainerImageRegistryBuildItem;
@@ -102,12 +101,6 @@ public void checkOpenshift(ApplicationInfoBuildItem applicationInfo, Capabilitie
         }
     }
 
-    @BuildStep
-    public void populateCustomImageName(OpenshiftConfig openshiftConfig,
-            BuildProducer<ContainerImageCustomNameBuildItem> containerImageCustomName) {
-        openshiftConfig.name.ifPresent(name -> containerImageCustomName.produce(new ContainerImageCustomNameBuildItem(name)));
-    }
-
     @BuildStep
     public void populateInternalRegistry(OpenshiftConfig openshiftConfig, ContainerImageConfig containerImageConfig,
             Capabilities capabilities,

extensions/kubernetes/vanilla/runtime/src/main/java/io/quarkus/kubernetes/runtime/config/KubernetesConfigFallback.java

@@ -0,0 +1,27 @@
+package io.quarkus.kubernetes.runtime.config;
+
+import java.util.function.Function;
+
+import io.smallrye.config.FallbackConfigSourceInterceptor;
+
+public class KubernetesConfigFallback extends FallbackConfigSourceInterceptor {
+    private static final String QUARKUS_KUBERNETES_CONFIG_PREFIX = "quarkus.kubernetes.";
+    private static final String QUARKUS_OPENSHIFT_CONFIG_PREFIX = "quarkus.openshift.";
+    private static final int OPENSHIFT_CONFIG_NAME_BEGIN = QUARKUS_OPENSHIFT_CONFIG_PREFIX.length();
+    private static final String QUARKUS_KNATIVE_CONFIG_PREFIX = "quarkus.knative.";
+    private static final int KNATIVE_CONFIG_NAME_BEGIN = QUARKUS_KNATIVE_CONFIG_PREFIX.length();
+
+    public KubernetesConfigFallback() {
+        super(new Function<String, String>() {
+            @Override
+            public String apply(final String name) {
+                if (name.startsWith(QUARKUS_OPENSHIFT_CONFIG_PREFIX)) {
+                    return QUARKUS_KUBERNETES_CONFIG_PREFIX + name.substring(OPENSHIFT_CONFIG_NAME_BEGIN);
+                } else if (name.startsWith(QUARKUS_KNATIVE_CONFIG_PREFIX)) {
+                    return QUARKUS_KUBERNETES_CONFIG_PREFIX + name.substring(KNATIVE_CONFIG_NAME_BEGIN);
+                }
+                return name;
+            }
+        });
+    }
+}

extensions/kubernetes/vanilla/runtime/src/main/resources/META-INF/services/io.smallrye.config.ConfigSourceInterceptor

@@ -0,0 +1 @@
+io.quarkus.kubernetes.runtime.config.KubernetesConfigFallback

integration-tests/kubernetes/quarkus-standard-way/src/test/java/io/quarkus/it/kubernetes/OpenshiftWithCustomNameTest.java

@@ -72,14 +72,6 @@ public void assertGeneratedResources() throws IOException {
                         assertThat(t.getMetadata()).satisfies(metadata -> assertThat(metadata.getLabels()).containsAnyOf(
                                 entry("app.kubernetes.io/name", CUSTOM_NAME),
                                 entry("app.kubernetes.io/version", "0.1-SNAPSHOT")));
-
-                        assertThat(t.getSpec()).satisfies(podSpec -> {
-                            assertThat(podSpec.getContainers()).singleElement().satisfies(container -> {
-                                assertThat(container.getImage())
-                                        .isEqualTo(
-                                                "testme/" + CUSTOM_NAME + ":0.1-SNAPSHOT");
-                            });
-                        });
                     });
                 });
             });