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feat (jkube-kit/config/service) : Detect and warn user if Ingress con…
…troller not available (eclipse-jkube#1478) + Add IngressControllerDetectorService which will try to detect whether any Ingress Controller is present in the cluster before applying Ingress. At the moment, it supports detecting these Ingress Controllers: - Contour - Ingress Kong - Ingress Nginx - OpenShift Ingress Controller This is based on Kind Ingress guide, we can also expand it if we want to. Signed-off-by: Rohan Kumar <rohaan@redhat.com>
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51
jkube-kit/common/src/main/java/org/eclipse/jkube/kit/common/IngressControllerDetector.java
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| @@ -0,0 +1,51 @@ | ||
| /** | ||
| * Copyright (c) 2019 Red Hat, Inc. | ||
| * This program and the accompanying materials are made | ||
| * available under the terms of the Eclipse Public License 2.0 | ||
| * which is available at: | ||
| * | ||
| * https://www.eclipse.org/legal/epl-2.0/ | ||
| * | ||
| * SPDX-License-Identifier: EPL-2.0 | ||
| * | ||
| * Contributors: | ||
| * Red Hat, Inc. - initial API and implementation | ||
| */ | ||
| package org.eclipse.jkube.kit.common; | ||
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| import io.fabric8.kubernetes.client.KubernetesClientException; | ||
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| public interface IngressControllerDetector { | ||
| /** | ||
| * Returns boolean value whether Ingress Controller is running in Kubernetes Cluster | ||
| * @return true if Ingress Controller is present, false otherwise | ||
| */ | ||
| default boolean isDetected() { | ||
| try { | ||
| return hasIngressClass() && isIngressControllerReady(); | ||
| } catch (KubernetesClientException exception) { | ||
| return false; | ||
| } | ||
| } | ||
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| /** | ||
| * Returns whether IngressClass for corresponding controller is installed in cluster | ||
| * | ||
| * @return true if IngressClass is installed, false otherwise | ||
| */ | ||
| boolean hasIngressClass(); | ||
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| /** | ||
| * Is Ingress Controller pod running in the cluster | ||
| * | ||
| * @return boolean value if Ingress Controller is running, false otherwise. | ||
| */ | ||
| boolean isIngressControllerReady(); | ||
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| /** | ||
| * Returns boolean value whether currently logged user has got enough permissions to | ||
| * check for current IngressController implementation | ||
| * @return true if it has permissions, false otherwise | ||
| */ | ||
| boolean hasPermissions(); | ||
| } |
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64 changes: 64 additions & 0 deletions
64
.../eclipse/jkube/kit/config/service/ingresscontroller/ContourIngressControllerDetector.java
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| @@ -0,0 +1,64 @@ | ||
| /** | ||
| * Copyright (c) 2019 Red Hat, Inc. | ||
| * This program and the accompanying materials are made | ||
| * available under the terms of the Eclipse Public License 2.0 | ||
| * which is available at: | ||
| * | ||
| * https://www.eclipse.org/legal/epl-2.0/ | ||
| * | ||
| * SPDX-License-Identifier: EPL-2.0 | ||
| * | ||
| * Contributors: | ||
| * Red Hat, Inc. - initial API and implementation | ||
| */ | ||
| package org.eclipse.jkube.kit.config.service.ingresscontroller; | ||
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| import io.fabric8.kubernetes.api.model.authorization.v1.SelfSubjectAccessReview; | ||
| import io.fabric8.kubernetes.client.KubernetesClient; | ||
| import org.eclipse.jkube.kit.common.IngressControllerDetector; | ||
| import org.eclipse.jkube.kit.common.util.KubernetesHelper; | ||
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| import static org.eclipse.jkube.kit.common.util.KubernetesHelper.createNewSelfSubjectAccessReview; | ||
| import static org.eclipse.jkube.kit.common.util.KubernetesHelper.hasAccessForAction; | ||
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| public class ContourIngressControllerDetector implements IngressControllerDetector { | ||
| private final KubernetesClient client; | ||
| private static final String INGRESS_CONTOUR_NAMESPACE = "projectcontour"; | ||
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| public ContourIngressControllerDetector(KubernetesClient client) { | ||
| this.client = client; | ||
| } | ||
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| @Override | ||
| public boolean hasIngressClass() { | ||
| return !client.network().v1().ingressClasses() | ||
| .withLabel("app.kubernetes.io/name", "contour") | ||
| .list() | ||
| .getItems() | ||
| .isEmpty(); | ||
| } | ||
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| @Override | ||
| public boolean isIngressControllerReady() { | ||
| return isComponentReady("envoy") && | ||
| isComponentReady("contour"); | ||
| } | ||
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| @Override | ||
| public boolean hasPermissions() { | ||
| SelfSubjectAccessReview listIngressClassAccess = createNewSelfSubjectAccessReview("networking.k8s.io", "ingressclasses", null, "list"); | ||
| SelfSubjectAccessReview listPodsAnyNamespaceAccess = createNewSelfSubjectAccessReview(null, "pods", INGRESS_CONTOUR_NAMESPACE, "list"); | ||
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| return hasAccessForAction(client, listIngressClassAccess) && hasAccessForAction(client, listPodsAnyNamespaceAccess); | ||
| } | ||
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| private boolean isComponentReady(String componentName) { | ||
| return client.pods() | ||
| .inNamespace(INGRESS_CONTOUR_NAMESPACE) | ||
| .withLabel("app.kubernetes.io/component", componentName) | ||
| .list() | ||
| .getItems() | ||
| .stream() | ||
| .anyMatch(KubernetesHelper::isPodReady); | ||
| } | ||
| } |
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