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From "Billie Rinaldi (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-6804) Allow custom hostname for docker containers in native services
Date Fri, 14 Jul 2017 16:00:01 GMT

    [ https://issues.apache.org/jira/browse/YARN-6804?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16087517#comment-16087517

Billie Rinaldi commented on YARN-6804:

bq. I think the check for if “LOG.isInfoEnabled” is not required
Most of the LOG.info checks in DockerLinuxContainerRuntime have LOG.isInfoEnabled() before
them (not sure why), so I was trying to match those. Do you think we should remove them all?

bq. the network parameter is not used, and the added NETWORK_TYPE_BRIDGE seems also not used
You're right, I had a version of the patch where I only set the hostname when the network
type was bridge, but then I read that docker hostname can be set even if network is host,
so I removed it.

bq. probably we can create a common util method in RegistryPathUtils
Good point. Actually there's already a method for that, we can just make encodeYarnID perform
the ctr replacement as well.

> Allow custom hostname for docker containers in native services
> --------------------------------------------------------------
>                 Key: YARN-6804
>                 URL: https://issues.apache.org/jira/browse/YARN-6804
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: yarn-native-services
>            Reporter: Billie Rinaldi
>            Assignee: Billie Rinaldi
>             Fix For: yarn-native-services
>         Attachments: YARN-6804-yarn-native-services.001.patch, YARN-6804-yarn-native-services.002.patch
> Instead of the default random docker container hostname, we could set a more user-friendly
hostname for the container. The default could be a hostname based on the container ID, with
an option for the AM to provide a different hostname. In the case of the native services AM,
we could provide the hostname that would be created by the registry DNS server. Regardless
of whether or not registry DNS is enabled, this would be a more useful hostname for the docker

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