hadoop-yarn-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Suma Shivaprasad (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-8569) Create an interface to provide cluster information to application
Date Fri, 05 Oct 2018 22:54:01 GMT

    [ https://issues.apache.org/jira/browse/YARN-8569?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16640432#comment-16640432
] 

Suma Shivaprasad commented on YARN-8569:
----------------------------------------

Thanks [~eyang] for updating the patch.

Looks like DockerLinuxContainerRuntime. handleYarnSysFSUpdate is not used. If so, can we remove
it?
YARN_CONTAINER_RUNTIME_YARN_SYSFS - Could we rename this to YARN_CONTAINER_RUNTIME_EXPORT_YARN_SYSFS
for better understanding of its use and update documentation that it should be set to true/false.


> Create an interface to provide cluster information to application
> -----------------------------------------------------------------
>
>                 Key: YARN-8569
>                 URL: https://issues.apache.org/jira/browse/YARN-8569
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>            Reporter: Eric Yang
>            Assignee: Eric Yang
>            Priority: Major
>              Labels: Docker
>         Attachments: YARN-8569 YARN sysfs interface to provide cluster information to
application.pdf, YARN-8569.001.patch, YARN-8569.002.patch, YARN-8569.003.patch, YARN-8569.004.patch,
YARN-8569.005.patch, YARN-8569.006.patch, YARN-8569.007.patch, YARN-8569.008.patch, YARN-8569.009.patch
>
>
> Some program requires container hostnames to be known for application to run.  For example,
distributed tensorflow requires launch_command that looks like:
> {code}
> # On ps0.example.com:
> $ python trainer.py \
>      --ps_hosts=ps0.example.com:2222,ps1.example.com:2222 \
>      --worker_hosts=worker0.example.com:2222,worker1.example.com:2222 \
>      --job_name=ps --task_index=0
> # On ps1.example.com:
> $ python trainer.py \
>      --ps_hosts=ps0.example.com:2222,ps1.example.com:2222 \
>      --worker_hosts=worker0.example.com:2222,worker1.example.com:2222 \
>      --job_name=ps --task_index=1
> # On worker0.example.com:
> $ python trainer.py \
>      --ps_hosts=ps0.example.com:2222,ps1.example.com:2222 \
>      --worker_hosts=worker0.example.com:2222,worker1.example.com:2222 \
>      --job_name=worker --task_index=0
> # On worker1.example.com:
> $ python trainer.py \
>      --ps_hosts=ps0.example.com:2222,ps1.example.com:2222 \
>      --worker_hosts=worker0.example.com:2222,worker1.example.com:2222 \
>      --job_name=worker --task_index=1
> {code}
> This is a bit cumbersome to orchestrate via Distributed Shell, or YARN services launch_command.
 In addition, the dynamic parameters do not work with YARN flex command.  This is the classic
pain point for application developer attempt to automate system environment settings as parameter
to end user application.
> It would be great if YARN Docker integration can provide a simple option to expose hostnames
of the yarn service via a mounted file.  The file content gets updated when flex command is
performed.  This allows application developer to consume system environment settings via a
standard interface.  It is like /proc/devices for Linux, but for Hadoop.  This may involve
updating a file in distributed cache, and allow mounting of the file via container-executor.



--
This message was sent by Atlassian JIRA
(v7.6.3#76005)

---------------------------------------------------------------------
To unsubscribe, e-mail: yarn-issues-unsubscribe@hadoop.apache.org
For additional commands, e-mail: yarn-issues-help@hadoop.apache.org


Mime
View raw message