Fabric8 连接 kubernetes
Fabric8 client 连接 Kubernetes 示例
package io.fabric8.kubernetes.examples;
import io.fabric8.kubernetes.api.model.Namespace;
import io.fabric8.kubernetes.api.model.NamespaceBuilder;
import io.fabric8.kubernetes.api.model.Quantity;
import io.fabric8.kubernetes.api.model.ReplicationController;
import io.fabric8.kubernetes.api.model.ReplicationControllerBuilder;
import io.fabric8.kubernetes.api.model.ResourceQuota;
import io.fabric8.kubernetes.api.model.ResourceQuotaBuilder;
import io.fabric8.kubernetes.api.model.Status;
import io.fabric8.kubernetes.client.APIGroupNotAvailableException;
import io.fabric8.kubernetes.client.Config;
import io.fabric8.kubernetes.client.ConfigBuilder;
import io.fabric8.kubernetes.client.DefaultKubernetesClient;
import io.fabric8.kubernetes.client.KubernetesClient;
import io.fabric8.kubernetes.client.KubernetesClientException;
import io.fabric8.kubernetes.client.Watch;
import io.fabric8.kubernetes.client.Watcher;
import io.fabric8.kubernetes.client.internal.SerializationUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import static io.fabric8.kubernetes.client.Watcher.Action.ERROR;
public class FullExample {
private static final Logger logger = LoggerFactory.getLogger(FullExample.class);
public static void main(String[] args) throws InterruptedException {
String master = "https://localhost:8443/";
if (args.length == 1) {
master = args[0];
}
Config config = new ConfigBuilder().withMasterUrl(master).build();
try (final KubernetesClient client = new DefaultKubernetesClient(config)) {
try (Watch watch = client.replicationControllers().inNamespace("thisisatest").withResourceVersion("0").watch(new Watcher<ReplicationController>() {
@Override
public void eventReceived(Action action, ReplicationController resource) {
logger.info("{}: {}", action, resource);
}
@Override
public void onClose(KubernetesClientException e) {
if (e != null) {
e.printStackTrace();
logger.error(e.getMessage(), e);
}
}
})) {
// Create a namespace for all our stuff
Namespace ns = new NamespaceBuilder().withNewMetadata().withName("thisisatest").addToLabels("this", "rocks").endMetadata().build();
log("Created namespace", client.namespaces().create(ns));
// Get the namespace by name
log("Get namespace by name", client.namespaces().withName("thisisatest").get());
// Get the namespace by label
log("Get namespace by label", client.namespaces().withLabel("this", "rocks").list());
ResourceQuota quota = new ResourceQuotaBuilder().withNewMetadata().withName("pod-quota").endMetadata().withNewSpec().addToHard("pods", new Quantity("10")).endSpec().build();
log("Create resource quota", client.resourceQuotas().inNamespace("thisisatest").create(quota));
try {
log("Get jobs in namespace", client.batch().jobs().inNamespace("thisisatest").list());
} catch (APIGroupNotAvailableException e) {
log("Skipping jobs example - extensions API group not available");
}
// Create an RC
ReplicationController rc = new ReplicationControllerBuilder()
.withNewMetadata().withName("nginx-controller").addToLabels("server", "nginx").endMetadata()
.withNewSpec().withReplicas(3)
.withNewTemplate()
.withNewMetadata().addToLabels("server", "nginx").endMetadata()
.withNewSpec()
.addNewContainer().withName("nginx").withImage("nginx")
.addNewPort().withContainerPort(80).endPort()
.endContainer()
.endSpec()
.endTemplate()
.endSpec().build();
log("Created RC", client.replicationControllers().inNamespace("thisisatest").create(rc));
log("Created RC with inline DSL",
client.replicationControllers().inNamespace("thisisatest").createNew()
.withNewMetadata().withName("nginx2-controller").addToLabels("server", "nginx").endMetadata()
.withNewSpec().withReplicas(0)
.withNewTemplate()
.withNewMetadata().addToLabels("server", "nginx2").endMetadata()
.withNewSpec()
.addNewContainer().withName("nginx").withImage("nginx")
.addNewPort().withContainerPort(80).endPort()
.endContainer()
.endSpec()
.endTemplate()
.endSpec().done());
// Get the RC by name in namespace
ReplicationController gotRc = client.replicationControllers().inNamespace("thisisatest").withName("nginx-controller").get();
log("Get RC by name in namespace", gotRc);
// Dump the RC as YAML
log("Dump RC as YAML", SerializationUtils.dumpAsYaml(gotRc));
log("Dump RC as YAML without state", SerializationUtils.dumpWithoutRuntimeStateAsYaml(gotRc));
// Get the RC by label
log("Get RC by label", client.replicationControllers().withLabel("server", "nginx").list());
// Get the RC without label
log("Get RC without label", client.replicationControllers().withoutLabel("server", "apache").list());
// Get the RC with label in
log("Get RC with label in", client.replicationControllers().withLabelIn("server", "nginx").list());
// Get the RC with label in
log("Get RC with label not in", client.replicationControllers().withLabelNotIn("server", "apache").list());
// Get the RC by label in namespace
log("Get RC by label in namespace", client.replicationControllers().inNamespace("thisisatest").withLabel("server", "nginx").list());
// Update the RC
client.replicationControllers().inNamespace("thisisatest").withName("nginx-controller").cascading(false).edit().editMetadata().addToLabels("new", "label").endMetadata().done();
client.replicationControllers().inNamespace("thisisatest").withName("nginx-controller").scale(8);
Thread.sleep(1000);
// Update the RC - change the image to apache
client.replicationControllers().inNamespace("thisisatest").withName("nginx-controller").edit().editSpec().editTemplate().withNewSpec()
.addNewContainer().withName("nginx").withImage("httpd")
.addNewPort().withContainerPort(80).endPort()
.endContainer()
.endSpec()
.endTemplate()
.endSpec().done();
Thread.sleep(1000);
// Update the RC - change the image back to nginx using a rolling update
client.replicationControllers().inNamespace("thisisatest").withName("nginx-controller").rolling().updateImage("nginx");
Thread.sleep(1000);
// Update the RC via rolling update with inline builder
client.replicationControllers().inNamespace("thisisatest").withName("nginx-controller")
.rolling().edit().editMetadata().addToLabels("testing", "rolling-update").endMetadata().done();
Thread.sleep(1000);
//Update the RC inline
client.replicationControllers().inNamespace("thisisatest").withName("nginx-controller").edit()
.editMetadata()
.addToLabels("another", "label")
.endMetadata()
.done();
log("Updated RC");
// Clean up the RC
client.replicationControllers().inNamespace("thisisatest").withName("nginx-controller").delete();
client.replicationControllers().inNamespace("thisisatest").withName("nginx2-controller").delete();
log("Deleted RCs");
//Create another RC inline
client.replicationControllers().inNamespace("thisisatest").createNew().withNewMetadata().withName("nginx-controller").addToLabels("server", "nginx").endMetadata()
.withNewSpec().withReplicas(3)
.withNewTemplate()
.withNewMetadata().addToLabels("server", "nginx").endMetadata()
.withNewSpec()
.addNewContainer().withName("nginx").withImage("nginx")
.addNewPort().withContainerPort(80).endPort()
.endContainer()
.endSpec()
.endTemplate()
.endSpec().done();
log("Created inline RC");
Thread.sleep(1000);
client.replicationControllers().inNamespace("thisisatest").withName("nginx-controller").delete();
log("Deleted RC");
log("Created RC", client.replicationControllers().inNamespace("thisisatest").create(rc));
client.replicationControllers().inAnyNamespace().withLabel("server", "nginx").delete();
log("Deleted RC by label");
log("Created RC", client.replicationControllers().inNamespace("thisisatest").create(rc));
client.replicationControllers().inNamespace("thisisatest").withField("metadata.name", "nginx-controller").delete();
log("Deleted RC by field");
log("Created service",
client.services().inNamespace("thisisatest").createNew()
.withNewMetadata().withName("testservice").endMetadata()
.withNewSpec()
.addNewPort().withPort(80).withNewTargetPort().withIntVal(80).endTargetPort().endPort()
.endSpec()
.done());
log("Updated service", client.services().inNamespace("thisisatest").withName("testservice").edit().editMetadata().addToLabels("test", "label").endMetadata().done());
client.replicationControllers().inNamespace("thisisatest").withField("metadata.name", "testservice").delete();
log("Deleted service by field");
log("Root paths:", client.rootPaths());
} finally {
// And finally clean up the namespace
client.namespaces().withName("thisisatest").delete();
log("Deleted namespace");
}
} catch (Exception e) {
e.printStackTrace();
logger.error(e.getMessage(), e);
Throwable[] suppressed = e.getSuppressed();
if (suppressed != null) {
for (Throwable t : suppressed) {
logger.error(t.getMessage(), t);
}
}
}
}
private static void log(String action, Object obj) {
logger.info("{}: {}", action, obj);
}
private static void log(String action) {
logger.info(action);
}
}