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From vanzin <...@git.apache.org>
Subject [GitHub] spark pull request: SPARK-1537 [WiP] Application Timeline Server i...
Date Fri, 26 Jun 2015 20:40:01 GMT
Github user vanzin commented on a diff in the pull request:

    https://github.com/apache/spark/pull/5423#discussion_r33393741
  
    --- Diff: docs/monitoring.md ---
    @@ -256,6 +256,157 @@ still required, though there is only one application available.
 Eg. to see the
     running app, you would go to `http://localhost:4040/api/v1/applications/[app-id]/jobs`.
 This is to
     keep the paths consistent in both modes.
     
    +## Hadoop YARN Timeline service history provider
    +
    +As well as the Filesystem History Provider, Spark can integrate with the Hadoop YARN

    +"Application Timeline Service". This is a service which runs in a YARN cluster, recording
    +application- and YARN- published events to a database, retrieving them on request.
    +
    +Spark integrates with the timeline service by
    +1. Publishing events to the timeline service as applications execute.
    +2. Listing application histories published to the timeline service.
    +3. Retrieving the details of specific application histories.
    +
    +### Configuring the Timeline Service
    +
    +For details on configuring and starting the timeline service, consult the Hadoop documentation.
    +
    +From the perspective of Spark, the key requirements are
    +1. The YARN timeline service must be running.
    +1. Its URL is known, and configured in the `yarn-site.xml` configuration file.
    +1. The user has an Kerberos credentials required to interact with the service.
    +
    +The timeline service URL must be declared in the property `yarn.timeline-service.webapp.address`,
    +or, if HTTPS is the protocol, `yarn.timeline-service.webapp.https.address`
    +
    +The choice between HTTP and HTTPS is made on the value of `yarn.http.policy`, with can
be one of 
    +`http-only` (default), `https_only` or `http_and_https`; HTTP will be used unless the
policy
    +is `https_only`.
    +
    +Examples:
    +
    +    <!-- Binding for HTTP endpoint -->
    +    <property>
    +      <name>yarn.timeline-service.webapp.address</name>
    +      <value>atshost.example.org:8188</value>
    +    </property>
    +    
    +    <property>
    +      <name>yarn.timeline-service.enabled</name>
    +      <value>true</value>
    +    </property>
    +
    +
    +The root web page of the timeline service can be verified with a web browser,
    +as an easy check that the service is live. For the HTTP 
    --- End diff --
    
    Looks unfinished?


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