org.apache.flink.kubernetes.highavailability

Class KubernetesLeaderElectionDriver

java.lang.Object

org.apache.flink.kubernetes.highavailability.KubernetesLeaderElectionDriver

All Implemented Interfaces:

org.apache.flink.runtime.leaderelection.LeaderElectionDriver

public class KubernetesLeaderElectionDriver
extends Object
implements org.apache.flink.runtime.leaderelection.LeaderElectionDriver

LeaderElectionDriver implementation for Kubernetes. The active leader is elected using Kubernetes. The current leader's address as well as its leader session ID is published via Kubernetes ConfigMap. Note that the contending lock and leader storage are using the same ConfigMap. And every component(e.g. ResourceManager, Dispatcher, RestEndpoint, JobManager for each job) will have a separate ConfigMap.

Constructor Summary

Constructors

Constructor and Description
KubernetesLeaderElectionDriver(FlinkKubeClient kubeClient, KubernetesConfigMapSharedWatcher configMapSharedWatcher, ExecutorService watchExecutorService, KubernetesLeaderElectionConfiguration leaderConfig, org.apache.flink.runtime.leaderelection.LeaderElectionEventHandler leaderElectionEventHandler, org.apache.flink.runtime.rpc.FatalErrorHandler fatalErrorHandler)

Method Summary

Modifier and Type	Method and Description
void	close()
boolean	hasLeadership()
String	toString()
void	writeLeaderInformation(org.apache.flink.runtime.leaderelection.LeaderInformation leaderInformation)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

KubernetesLeaderElectionDriver

public KubernetesLeaderElectionDriver(FlinkKubeClient kubeClient,
                                      KubernetesConfigMapSharedWatcher configMapSharedWatcher,
                                      ExecutorService watchExecutorService,
                                      KubernetesLeaderElectionConfiguration leaderConfig,
                                      org.apache.flink.runtime.leaderelection.LeaderElectionEventHandler leaderElectionEventHandler,
                                      org.apache.flink.runtime.rpc.FatalErrorHandler fatalErrorHandler)

Method Detail

close

public void close()

Specified by:

close in interface org.apache.flink.runtime.leaderelection.LeaderElectionDriver

writeLeaderInformation

public void writeLeaderInformation(org.apache.flink.runtime.leaderelection.LeaderInformation leaderInformation)

Specified by:

writeLeaderInformation in interface org.apache.flink.runtime.leaderelection.LeaderElectionDriver

hasLeadership

public boolean hasLeadership()

Specified by:

hasLeadership in interface org.apache.flink.runtime.leaderelection.LeaderElectionDriver

toString

public String toString()

Overrides:

toString in class Object