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https://issues.apache.org/jira/browse/YARN-7987?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Eric Badger updated YARN-7987:
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Labels: Docker (was: )
> Docker container name(--name) needs to be DNS friendly for DNS resolution to
> work in user defined networks.
> ------------------------------------------------------------------------------------------------------------
>
> Key: YARN-7987
> URL: https://issues.apache.org/jira/browse/YARN-7987
> Project: Hadoop YARN
> Issue Type: Sub-task
> Reporter: Suma Shivaprasad
> Assignee: Suma Shivaprasad
> Priority: Major
> Labels: Docker
>
> User defined networks like overlays support DNS resolution through Docker
> Embedded DNS which needs the container name (–name parameter value in docker
> run) to be a FQDN for container names to be resolved - Please refer
> documentation
> [https://docs.docker.com/v17.09/engine/userguide/networking/configure-dns/]
> However Yarn sets the container name to the container's id which is not DNS
> friendly(eg: container_e26_1519402686002_0035_01_000003) and is not a FQDN.
> The proposal is to set a FQDN(eg:
> ctr-e26-1519402686002-0035-01-000003.domain-name) as the docker container's
> name for containers to be able to communicate to each other via hostnames in
> user defined networks like overlays, bridges etc. The domain name will be
> picked up from the YARN DNS registry configuration
> (hadoop.registry.dns.domain-name)
>
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