io.fabric8.openshift.examples.DeploymentConfigScale Maven / Gradle / Ivy
/*
* Copyright (C) 2015 Red Hat, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package io.fabric8.openshift.examples;
import io.fabric8.kubernetes.client.KubernetesClientBuilder;
import io.fabric8.kubernetes.client.KubernetesClientException;
import io.fabric8.openshift.api.model.DeploymentConfig;
import io.fabric8.openshift.api.model.DeploymentConfigList;
import io.fabric8.openshift.api.model.DeploymentConfigSpec;
import io.fabric8.openshift.client.OpenShiftAPIGroups;
import io.fabric8.openshift.client.OpenShiftClient;
import io.fabric8.openshift.client.dsl.DeployableScalableResource;
import java.util.List;
import java.util.Objects;
public class DeploymentConfigScale {
public static void main(String[] args) {
if (args.length < 2) {
System.err.println("Usage nameOfDC replicas");
return;
}
String name = args[0];
String replicaText = args[1];
int replicas;
try {
replicas = Integer.parseInt(replicaText);
} catch (NumberFormatException e) {
System.out.println("Could not parse integer " + replicaText + " due to: " + e);
return;
}
try (OpenShiftClient client = new KubernetesClientBuilder().build().adapt(OpenShiftClient.class)) {
Integer oldReplicas = 0;
if (!client.supportsOpenShiftAPIGroup(OpenShiftAPIGroups.APPS)) {
System.out.println("WARNING this cluster does not support the API Group " + OpenShiftAPIGroups.APPS);
return;
}
DeployableScalableResource resource = client.deploymentConfigs().withName(name);
DeploymentConfig deploymentConfig = resource.get();
if (deploymentConfig == null) {
System.out.println("Could not find a DeploymentConfig for name: " + name);
return;
}
try {
DeploymentConfigSpec spec = deploymentConfig.getSpec();
oldReplicas = spec.getReplicas();
spec.setReplicas(replicas);
DeploymentConfig updated = resource.patch(deploymentConfig);
System.out.println("Updated the DeploymentConfig " + name + " version: " + deploymentConfig.getApiVersion()
+ " with replicas: " + replicas + " to resourceVersion: " + updated.getMetadata().getResourceVersion());
} catch (Exception e) {
System.out.println("Failed to update the DeploymentConfig " + name + " with replicas: " + replicas);
e.printStackTrace();
}
// now lets find the DC via list
DeploymentConfigList list = Objects.requireNonNull(client.deploymentConfigs().list(),
"No DeploymentConfigList returned");
List items = Objects.requireNonNull(list.getItems(),
"No DeploymentConfigList.getItems() returned");
DeploymentConfig found = null;
for (DeploymentConfig item : items) {
if (name.equals(item.getMetadata().getName())) {
found = item;
break;
}
}
Objects.requireNonNull(found, "Could not find DeploymentConfig in list.getItems() for name: " + name);
found.getSpec().setReplicas(oldReplicas);
try {
DeploymentConfig updated = resource.patch(found);
System.out.println("Updated the list.item DeploymentConfig " + name + " version: " + found.getApiVersion()
+ " with replicas: " + oldReplicas + " to resourceVersion: " + updated.getMetadata().getResourceVersion());
} catch (Exception e) {
System.out.println("Failed to update the list.item DeploymentConfig " + name + " with replicas: " + oldReplicas);
e.printStackTrace();
}
} catch (KubernetesClientException e) {
System.out.println("Failed: " + e);
e.printStackTrace();
}
}
}