Abin Shahab created YARN-2480:

             Summary: DockerContainerExecutor must support user namespaces
                 Key: YARN-2480
                 URL: https://issues.apache.org/jira/browse/YARN-2480
             Project: Hadoop YARN
          Issue Type: New Feature
            Reporter: Abin Shahab

When DockerContainerExector launches a container, the root inside that 
container has root privileges on the host. 
This is insecure in a mult-tenant environment. The uid of the container's root 
user must be mapped to a non-privileged user on the host.

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