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https://issues.apache.org/jira/browse/YARN-5877?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15695051#comment-15695051
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Sunil G commented on YARN-5877:
-------------------------------
[~varun_saxena] and [~bibinchundatt]
bq.Do we however need to provide a facility for container launch context env to
take precedence for some containers and take default from docker env for some
others ? Anyways, that would need more discussion regarding if there is any use
case for this.
I think we are little early to reach to conclusion on this as we do not have
any substantial use cases yet.
bq.docker-env-whitelist
To add this new configuration, we have discussed the real causes in detail. And
this patch is planning to use this as a general config and HADOOP_MAPRED_HOME
is the only configuration which will be configured via this.
I am still not very convinced with few possible mis uses.
- How can we prevent user from configuring same config in both configs? If so
which will get preference ?
- I am still thinking of the explanation to be provided to users for the use of
this new config? I still think it will be very tough to convince users with
real usage.
I am bouncing this question again since its the case of a new config to client
side. :)
Thoughts?
> Allow all nm-whitelist-env to get overridden during launch
> ----------------------------------------------------------
>
> Key: YARN-5877
> URL: https://issues.apache.org/jira/browse/YARN-5877
> Project: Hadoop YARN
> Issue Type: Bug
> Reporter: Bibin A Chundatt
> Assignee: Bibin A Chundatt
> Attachments: Dockerfile, YARN-5877.0001.patch, YARN-5877.0002.patch,
> YARN-5877.0003.patch, bootstrap.sh, yarn-site.xml
>
>
> As per the {{yarn.nodemanager.env-whitelist}} for the configured values
> should containers may override rather than use NodeManager's default.
> {code}
> <property>
> <description>Environment variables that containers may override rather
> than use NodeManager's default.</description>
> <name>yarn.nodemanager.env-whitelist</name>
>
> <value>JAVA_HOME,HADOOP_COMMON_HOME,HADOOP_HDFS_HOME,HADOOP_CONF_DIR,CLASSPATH_PREPEND_DISTCACHE,HADOOP_YARN_HOME</value>
> </property>
> {code}
> But only the following containers can override
> {code}
> whitelist.add(ApplicationConstants.Environment.HADOOP_YARN_HOME.name());
> whitelist.add(ApplicationConstants.Environment.HADOOP_COMMON_HOME.name());
> whitelist.add(ApplicationConstants.Environment.HADOOP_HDFS_HOME.name());
> whitelist.add(ApplicationConstants.Environment.HADOOP_CONF_DIR.name());
> whitelist.add(ApplicationConstants.Environment.JAVA_HOME.name());
> {code}
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