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https://issues.apache.org/jira/browse/YARN-6447?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15979537#comment-15979537
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Robert Kanter commented on YARN-6447:
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Looks good overall. A few minor things:
# We should make sure to reset all system properties being set in the unit
tests. While we're at it, we should fix the other ones already in
{{TestJavaSandboxLinuxContainerRuntime}}.
# Can you add a test for the scenario where a user belongs to multiple groups?
# If you specify
{{yarn.nodemanager.runtime.linux.sandbox-mode.policy.group.foo}} it looks like
you get both the foo group's policy and also either the default policy or the
{{yarn.nodemanager.runtime.linux.sandbox-mode.policy}} policy. Shouldn't you
only get one of the three? i.e. ONE of the group's (or groups') policies, the
default policy, or the custom policy
# Would capitalization be a problem for the groups? What if a user is in the
"FOo" group but the admin accidentally specifies
{{yarn.nodemanager.runtime.linux.sandbox-mode.policy.group.fOo}}?
> Provide container sandbox policies for groups
> ----------------------------------------------
>
> Key: YARN-6447
> URL: https://issues.apache.org/jira/browse/YARN-6447
> Project: Hadoop YARN
> Issue Type: Improvement
> Components: nodemanager, yarn
> Affects Versions: 3.0.0-alpha3
> Reporter: Greg Phillips
> Assignee: Greg Phillips
> Priority: Minor
> Attachments: YARN-6447.001.patch
>
>
> Currently the container sandbox feature
> ([YARN-5280|https://issues.apache.org/jira/browse/YARN-5280]) allows YARN
> administrators to use one Java Security Manager policy file to limit the
> permissions granted to YARN containers. It would be useful to allow for
> different policy files to be used based on groups.
> For example, an administrator may want to ensure standard users who write
> applications for the MapReduce or Tez frameworks are not allowed to open
> arbitrary network connections within their data processing code. Users who
> are designing the ETL pipelines however may need to open sockets to extract
> data from external sources. By assigning these sets of users to different
> groups and setting specific policies for each group you can assert fine
> grained control over the permissions granted to each Java based container
> across a YARN cluster.
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