[HADOOP-14202] fix jsvc/secure user var inconsistencies

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.0.0-alpha2
• Fix Version/s: 3.0.0-alpha4
• Component/s: scripts
• Target Version/s: 3.0.0-alpha4
• Hadoop Flags: Incompatible change

Release Note

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The secure user variables have been changed to be consistent with the rest of the environment variable changes:

| Old | New |
|:---- |:---- |
| HADOOP\_SECURE\_DN\_USER | HDFS\_DATANODE\_SECURE\_USER |
| HADOO\P_PRIVILEGED\_NFS\_USER | HDFS\_NFS3\_SECURE\_USER |

• Assignee: Allen Wittenauer
• Reporter: Allen Wittenauer
• Created: 19/Mar/17 20:06
• Updated: 17/Apr/17 15:42
• Resolved: 07/Apr/17 16:00

Description

Post-HADOOP-13341 and (more importantly) HADOOP-13673, there has been a major effort on making the configuration environment variables consistent among all the projects. The vast majority of vars now look like (command)(subcommand)(etc). Two hold outs are HADOOP_SECURE_DN_USER and HADOOP_PRIVILEGED_NFS_USER.

Additionally, there is

• no generic handling
• no documentation for anyone
• no safety checks to make sure things are defined

In order to fix all of this, we should:

• deprecate the previous vars using the deprecation function, updating the HDFS documentation that references them
• add generic (command)_(subcommand)_SECURE_USER support
• add some verification for the previously mentioned var
• add some docs to UnixShellGuide.md

Issue Links

• is blocked by: YETUS-498 shelllcheck needs to have -x support