Configuring YARN Timeline server

The Timeline server requires a few basic configurations to start but it also provides various configuration options for specific purposes. Let's look at a few configurations of a Timeline server:

• Basic configuration: The basic configuration is good enough to start a Timeline server, which generally allows the client and resource manager to publish their metrics, as follows:

        <property>
          <description>
          If enabled, the end user can post entities using TimelineClient library.
        </description>
          <name>YARN.timeline-service.enabled</name>
          <value>true</value>
        </property>

        <property>
          <description>if enabled the  system metrics send by Resource Manager will be 
                       published on the timeline server..</description>
          <name>YARN.resourcemanager.system-metrics-publisher.enabled</name>
          <value>true</value>
        </property>

        <property>
          <description> if enabled Client can query application data directly from                         Timeline server.</description>
          <name>YARN.timeline-service.generic-application-history.enabled</name>
          <value>true</value>
        </property>

• Host configuration: The host for a Timeline server is set via the following configuration. It indicates the web address of the Timeline server, for example:

        <property>
          <name>YARN.timeline-service.hostname</name>
          <value>0.0.0.0</value>
        </property>
        <property>
          <description>Address for the Timeline server to start the RPC server.
        </description>
          <name>YARN.timeline-service.address</name>
          <value>${YARN.timeline-service.hostname}:10200</value>
        </property>

        <property>
          <description>The http address of the Timeline service web application.
          </description>
          <name>YARN.timeline-service.webapp.address</name>
          <value>${YARN.timeline-service.hostname}:8188</value>
        </property>

        <property>
          <description>The https address of the Timeline service web application.
          </description>
          <name>YARN.timeline-service.webapp.https.address</name>
          <value>${YARN.timeline-service.hostname}:8190</value>
        </property>

        <property>
          <description>Handler thread count to serve the client RPC requests. 
          </description>
          <name>YARN.timeline-service.handler-thread-count</name>
          <value>10</value>
        </property>

• Starting the Timeline server: Finally we can start the Timeline server using following command:

        YARN timelineserver