org.apache.hadoop.yarn.api

Interface CsiAdaptorProtocol

All Known Subinterfaces:

CsiAdaptorPlugin

public interface CsiAdaptorProtocol

CSI adaptor delegates all the calls from YARN to a CSI driver.

Method Summary

Modifier and Type	Method and Description
GetPluginInfoResponse	getPluginInfo(GetPluginInfoRequest request) Get plugin info from the CSI driver.
NodePublishVolumeResponse	nodePublishVolume(NodePublishVolumeRequest request) Publish the volume on a node manager, the volume will be mounted to the local file system and become visible for clients.
NodeUnpublishVolumeResponse	nodeUnpublishVolume(NodeUnpublishVolumeRequest request) This is a reverse operation of nodePublishVolume(NodePublishVolumeRequest), it un-mounts the volume from given node.
ValidateVolumeCapabilitiesResponse	validateVolumeCapacity(ValidateVolumeCapabilitiesRequest request) Validate if the volume capacity can be satisfied on the underneath storage system.

Method Detail

getPluginInfo

GetPluginInfoResponse getPluginInfo(GetPluginInfoRequest request)
                             throws YarnException,
                                    IOException

Get plugin info from the CSI driver. The driver usually returns the name of the driver and its version.

Parameters:

request - get plugin info request.

Returns:

response that contains driver name and its version.

Throws:

YarnException - exceptions from yarn servers.

IOException - io error occur.

validateVolumeCapacity

ValidateVolumeCapabilitiesResponse validateVolumeCapacity(ValidateVolumeCapabilitiesRequest request)
                                                   throws YarnException,
                                                          IOException

Validate if the volume capacity can be satisfied on the underneath storage system. This method responses if the capacity can be satisfied or not, with a detailed message.

Parameters:

request - validate volume capability request.

Returns:

validation response.

Throws:

YarnException - exceptions from yarn servers.

IOException - io error occur.

nodePublishVolume

NodePublishVolumeResponse nodePublishVolume(NodePublishVolumeRequest request)
                                     throws YarnException,
                                            IOException

Publish the volume on a node manager, the volume will be mounted to the local file system and become visible for clients.

Parameters:

request - publish volume request.

Returns:

publish volume response.

Throws:

YarnException - exceptions from yarn servers.

IOException - io error occur.

nodeUnpublishVolume

NodeUnpublishVolumeResponse nodeUnpublishVolume(NodeUnpublishVolumeRequest request)
                                         throws YarnException,
                                                IOException

This is a reverse operation of nodePublishVolume(NodePublishVolumeRequest), it un-mounts the volume from given node.

Parameters:

request - un-publish volume request.

Returns:

un-publish volume response.

Throws:

YarnException - exceptions from yarn servers.

IOException - io error occur.