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From "Eric Yang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-8523) Interactive docker shell
Date Thu, 09 Aug 2018 01:37:00 GMT

    [ https://issues.apache.org/jira/browse/YARN-8523?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16574174#comment-16574174

Eric Yang commented on YARN-8523:

[~Zian Chen] In today's meetup, [~jlowe] suggested to bind docker exec to a named pipe or
socket.  This will allow node manager restart while persisting docker exec state, and reconnect
to the named pipe to resume docker exec session.  This is one approach to workaround node
manager restart while maintains a live session to docker exec.  However, resuming docker exec
session may introduce limitation where docker exec is stuck, and no way to start new sessions.
 Step one is get xtermjs connect to web socket serve by node manager that launches docker
exec.  Step 2 can refine the session mapping logic to create/resume named pipe to docker exec.
 I think it would be reasonable for step 2 to be created as a separate JIRA to contain the
scope of the work.

> Interactive docker shell
> ------------------------
>                 Key: YARN-8523
>                 URL: https://issues.apache.org/jira/browse/YARN-8523
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>            Reporter: Eric Yang
>            Priority: Major
>              Labels: Docker
> Some application might require interactive unix commands executions to carry out operations.
 Container-executor can interface with docker exec to debug or analyze docker containers while
the application is running.  It would be nice to support an API to invoke docker exec to perform
unix commands and report back the output to application master.  Application master can distribute
and aggregate execution of the commands to record in application master log file.

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