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From "Shane Kumpf (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-5818) Support the Docker Live Restore feature
Date Wed, 02 Nov 2016 17:20:58 GMT

    [ https://issues.apache.org/jira/browse/YARN-5818?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15629691#comment-15629691
] 

Shane Kumpf commented on YARN-5818:
-----------------------------------

Did some initial testing here and unfortunately, given that docker is a client/server model,
when the docker daemon is down for restart/upgrade, client operations fail with an EOF exception.
Our use of {{docker wait}} for retrieving the containers exit code breaks down as the client
operation failures during the restart/upgrade.
{code}
An error occurred trying to connect: Post http://%2Fvar%2Frun%2Fdocker.sock/v1.24/containers/c11692777816e44049d610c4ad358a24eefbff707cdbd85c24df3d153c80401e/wait:
EOF
{code}

The docker community believes this is working as intended and does not plan to fix this behavior.
It appears we will have to handle retries in c-e.

> Support the Docker Live Restore feature
> ---------------------------------------
>
>                 Key: YARN-5818
>                 URL: https://issues.apache.org/jira/browse/YARN-5818
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: yarn
>            Reporter: Shane Kumpf
>
> Docker 1.12.x introduced the docker [Live Restore|https://docs.docker.com/engine/admin/live-restore/]
feature which allows docker containers to survive docker daemon restarts/upgrades. Support
for this feature should be added to YARN to allow docker changes and upgrades to be less impactful
to existing containers.



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