Package org.apache.hadoop.yarn.server.nodemanager.containermanager.volume.csi

Class ContainerVolumePublisher

java.lang.Object

org.apache.hadoop.yarn.server.nodemanager.containermanager.volume.csi.ContainerVolumePublisher

public class ContainerVolumePublisher
extends Object

Publish/un-publish CSI volumes on node manager.

Constructor Summary

Constructors

Constructor	Description
ContainerVolumePublisher(Container container, String localMountRoot, OCIContainerRuntime runtime)

Method Summary

Modifier and Type	Method	Description
Map<String,String>	publishVolumes()	It first discovers the volume info from container resource; then negotiates with CSI driver adaptor to publish the volume on this node manager, on a specific directory under container's work dir; and then map the local mounted directory to volume target mount in the docker container.
void	unpublishVolumes()

Methods inherited from class java.lang.Object

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

Constructor Details

ContainerVolumePublisher

public ContainerVolumePublisher(Container container,
 String localMountRoot,
 OCIContainerRuntime runtime)

Method Details

publishVolumes

public Map<String,String> publishVolumes()
                                  throws org.apache.hadoop.yarn.exceptions.YarnException,
IOException

It first discovers the volume info from container resource; then negotiates with CSI driver adaptor to publish the volume on this node manager, on a specific directory under container's work dir; and then map the local mounted directory to volume target mount in the docker container. CSI volume publish is a two phase work, by reaching up here we can assume the 1st phase is done on the RM side, which means YARN is already called the controller service of csi-driver to publish the volume; here we only need to call the node service of csi-driver to publish the volume on this local node manager.

Returns:

a map where each key is the local mounted path on current node, and value is the remote mount path on the container.

Throws:

org.apache.hadoop.yarn.exceptions.YarnException

IOException

unpublishVolumes

public void unpublishVolumes()
                      throws org.apache.hadoop.yarn.exceptions.YarnException,
IOException

Throws:

org.apache.hadoop.yarn.exceptions.YarnException

IOException