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BindingExample.java
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BindingExample.java
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/**
* 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.kubernetes.examples;
import io.fabric8.kubernetes.api.model.BindingBuilder;
import io.fabric8.kubernetes.api.model.Node;
import io.fabric8.kubernetes.api.model.ObjectMetaBuilder;
import io.fabric8.kubernetes.api.model.PodBuilder;
import io.fabric8.kubernetes.api.model.PodSpecBuilder;
import io.fabric8.kubernetes.client.DefaultKubernetesClient;
import io.fabric8.kubernetes.client.KubernetesClient;
import java.util.UUID;
public class BindingExample {
@SuppressWarnings("java:S106")
public static void main(String[] args) {
final String podName = "binding-example-" + UUID.randomUUID().toString();
try (final KubernetesClient client = new DefaultKubernetesClient()) {
final String namespace;
if (client.getConfiguration().getNamespace() != null) {
namespace = client.getConfiguration().getNamespace();
} else if (client.getNamespace() != null) {
namespace = client.getNamespace();
} else {
namespace = client.namespaces().list().getItems().stream().findFirst()
.orElseThrow(() -> new IllegalStateException("No namespace available")).getMetadata().getName();
}
client.pods().inNamespace(namespace).create(new PodBuilder()
.withMetadata(new ObjectMetaBuilder()
.withName(podName)
.build())
.withSpec(new PodSpecBuilder()
.withSchedulerName("random-scheduler-name-which-does-not-exist")
.addNewContainer()
.withName(podName)
.withImage("nginx:latest")
.endContainer()
.build())
.build()
);
final Node firstNode = client.nodes().list().getItems().stream().findFirst()
.orElseThrow(() -> new IllegalStateException("No nodes available"));
client.bindings().inNamespace(namespace).create(new BindingBuilder()
.withNewMetadata().withName(podName).endMetadata()
.withNewTarget()
.withKind(firstNode.getKind())
.withApiVersion(firstNode.getApiVersion())
.withName(firstNode.getMetadata().getName()).endTarget()
.build());
System.out.printf("Successfully bound Pod %s to Node %s%n",
podName, firstNode.getMetadata().getName());
}
}
}