[YARN-7935] Expose container's hostname to applications running within the docker container

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Not A Problem
• Component/s: yarn
• Labels: Docker
• Assignee: Suma Shivaprasad
• Reporter: Suma Shivaprasad
• Created: 15/Feb/18 00:11
• Updated: 04/Oct/18 23:14
• Resolved: 04/Oct/18 23:14

Description

Some applications have a need to bind to the container's hostname (like Spark) which is different from the NodeManager's hostname(NM_HOST which is available as an env during container launch) when launched through Docker runtime. The container's hostname can be exposed to applications via an env CONTAINER_HOSTNAME. Another potential candidate is the container's IP but this can be addressed in a separate jira.

Issue Links

• is related to: SPARK-23719 Use correct hostname in non-host networking mode in hadoop 3 docker support