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https://issues.apache.org/jira/browse/YARN-5561?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15445004#comment-15445004
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Rohith Sharma K S commented on YARN-5561:
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Looking into code base for reader for supporting these REST end points. I see
that ApplicationTable schema is defined with row key
*clusterId!userName!flowName!flowRunId!AppId*.
# */apps* without userId and flowName should be able to read. Currently it is
mandatory that to read apps to provide userId and flowName.
# */apps/\{app-id\}/app-attempts* can be redirect to existing getEntity for
YARN-APPLICATIOIN-ENTITY.
# */apps/\{app-id\}/app-attempt/\{app-attempt-id\}/containers*. As per design,
YARN_APPLICATION_ATTEMPT and YARN_CONTAINERS are stored as general entities.
Reading will be same as others user entities. I think there should be another
hbase table that stores YARN specific entities. Otherwise it is big overhead
for clients to parse output to know about its parent entity.
> [Atsv2] : Support for ability to retrieve apps/app-attempt/containers and
> entities via REST
> -------------------------------------------------------------------------------------------
>
> Key: YARN-5561
> URL: https://issues.apache.org/jira/browse/YARN-5561
> Project: Hadoop YARN
> Issue Type: Bug
> Components: timelinereader
> Reporter: Rohith Sharma K S
> Assignee: Rohith Sharma K S
>
> ATSv2 model lacks retrieval of {{list-of-all-apps}},
> {{list-of-all-app-attempts}} and {{list-of-all-containers-per-attempt}} via
> REST API's. And also it is required to know about all the entities in an
> applications.
> It is pretty much highly required these URLs for Web UI.
> New REST URL would be
> # GET {{/ws/v2/timeline/apps}}
> # GET {{/ws/v2/timeline/apps/\{app-id\}/appattempts}}.
> # GET
> {{/ws/v2/timeline/apps/\{app-id\}/appattempts/\{attempt-id\}/containers}}
> # GET {{/ws/v2/timeline/apps/\{app id\}/entities}} should display list of
> entities that can be queried.
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