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From "Shane Kumpf (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-5428) Allow for specifying the docker client configuration directory
Date Tue, 26 Jul 2016 00:33:20 GMT

    [ https://issues.apache.org/jira/browse/YARN-5428?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15392920#comment-15392920
] 

Shane Kumpf commented on YARN-5428:
-----------------------------------

Attaching a patch that allows for specifying the docker client configuration directory.

It adds the configuration parameter yarn.nodemanager.runtime.linux.docker.client-config-directory
to yarn-site to allow the admin to specify the directory where the docker configuration file
is stored on each node.

Note that the --config=<client config directory> option is for docker CLI, and needs
to come before the action (run, load, pull, etc), so it was added to the DockerCommand abstract
class. This will prove useful for other options that need to be prepended to the docker command
line args, such as debug. The config option has only been added to launchContainer, as that
is where the implicit docker pull occurs and the credentials would be needed.

> Allow for specifying the docker client configuration directory
> --------------------------------------------------------------
>
>                 Key: YARN-5428
>                 URL: https://issues.apache.org/jira/browse/YARN-5428
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: yarn
>            Reporter: Shane Kumpf
>            Assignee: Shane Kumpf
>         Attachments: YARN-5428.001.patch
>
>
> The docker client allows for specifying a configuration directory that contains the docker
client's configuration. It is common to store "docker login" credentials in this config, to
avoid the need to docker login on each cluster member. 
> By default the docker client config is $HOME/.docker/config.json on Linux. However, this
does not work with the current container executor user switching and it may also be desirable
to centralize this configuration beyond the single user's home directory.
> Note that the command line arg is for the configuration directory NOT the configuration
file.
> This change will be needed to allow YARN to automatically pull images at localization
time or within container executor.



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