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https://issues.apache.org/jira/browse/YARN-5952?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15944148#comment-15944148
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Wangda Tan commented on YARN-5952:
----------------------------------
Thanks Jonathan,
Had some offline discussions with @vinod, some comments:
1)
For REST end point, do you think is it better to rename it to {{/queues}}? I
think what this feature done is mostly for queue-related config changes. In the
future we could add changes to modify scheduler global configs as well, but we
can do that though a different end point since it doesn't have the issues same
to queue-related configs like atomically update/add/remove queues.
And an additional benefit is we can have a GET {{/queues}} and
{{/queues/{queue-path}}} in the future which looks more consistent.
2)
For update queue REST record:
2.1) Is it better to rename {{SchedulerConfigurationInfo}} to
{{QueueConfigsUpdate}}?
2.2) I'm not sure if the nested queue hierarchy is a MUST for your use cases,
from our POV it is a little confusing. Could we flat it and for all queues
requires to specify full queue path?
2.3) For general REST layout. Here's my suggested REST record:
{code}
QueueConfigsUpdate: {
adds: [
{
queuePath: "root.a",
params: {
"x": "x1",
"y": "y1"
}
},
{
queuePath: "root.a.a1",
params: {
// ...
}
}
],
removes: [
"root.b",
"root.c"
],
updates: [
// internal of updates is same as adds
]
}
{code}
Basically we can reuse REST Java record of add/update. And removes could be a
simple array of Strings.
3) ACLs:
We can add more per-queue ACLs in the future, but I think for this patch, we
should only allow admin to update configs. You can reference to logics in
{{dumpSchedulerLogs}}:
{code}
ApplicationACLsManager aclsManager = rm.getApplicationACLsManager();
if (aclsManager.areACLsEnabled()) {
if (callerUGI == null || !aclsManager.isAdmin(callerUGI)) {
String msg = "Only admins can carry out this operation.";
throw new ForbiddenException(msg);
}
}
{code}
4) Instead of checking if a scheduler is CS or not, is it better to make CS
inheriting an interface like {{MutableConfScheduler}} and use instanceof to
check scheduler in RMWebServices.
> Create REST API for changing YARN scheduler configurations
> ----------------------------------------------------------
>
> Key: YARN-5952
> URL: https://issues.apache.org/jira/browse/YARN-5952
> Project: Hadoop YARN
> Issue Type: Sub-task
> Reporter: Jonathan Hung
> Assignee: Jonathan Hung
> Attachments: YARN-5952.001.patch, YARN-5952.002.patch,
> YARN-5952-YARN-5734.003.patch, YARN-5952-YARN-5734.004.patch,
> YARN-5952-YARN-5734.005.patch
>
>
> Based on the design in YARN-5734.
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