[HDFS-5585] Provide admin commands for data node upgrade

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: HDFS-5535 (Rolling upgrades)
• Component/s: datanode, ha, hdfs-client, namenode
• Hadoop Flags: Reviewed
• Assignee: Kihwal Lee
• Reporter: Kihwal Lee
• Created: 02/Dec/13 16:49
• Updated: 21/Feb/14 20:52
• Resolved: 14/Feb/14 21:21

Description

Several new methods to ClientDatanodeProtocol may need to be added to support querying version, initiating upgrade, etc. The admin CLI needs to be added as well. This primary use case is for rolling upgrade, but this can be used for preparing for a graceful restart of a data node for any reasons.

Issue Links

• is depended upon by: HDFS-5583 Make DN send an OOB Ack on shutdown before restarting
• is depended upon by: HDFS-5778 Document new commands and parameters for improved rolling upgrades
• is depended upon by: HDFS-5924 Utilize OOB upgrade message processing for writes