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| <h5>YARN</h5> |
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| <a href="../../../hadoop-yarn/hadoop-yarn-site/NodeAttributes.html">Node Attributes</a> |
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| <a href="../../../hadoop-yarn/hadoop-yarn-site/OpportunisticContainers.html">Opportunistic Containers</a> |
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| <a href="../../../hadoop-yarn/hadoop-yarn-site/Federation.html">YARN Federation</a> |
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| <a href="../../../hadoop-yarn/hadoop-yarn-site/SharedCache.html">Shared Cache</a> |
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| <a href="../../../hadoop-yarn/hadoop-yarn-site/UsingGpus.html">Using GPU</a> |
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| <a href="../../../hadoop-yarn/hadoop-yarn-site/UsingFPGA.html">Using FPGA</a> |
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| <a href="../../../hadoop-yarn/hadoop-yarn-site/PlacementConstraints.html">Placement Constraints</a> |
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| <a href="../../../hadoop-yarn/hadoop-yarn-site/YarnUI2.html">YARN UI2</a> |
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| <h5>YARN REST APIs</h5> |
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| <a href="../../../hadoop-yarn/hadoop-yarn-site/WebServicesIntro.html">Introduction</a> |
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| <a href="../../../hadoop-yarn/hadoop-yarn-site/ResourceManagerRest.html">Resource Manager</a> |
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| <a href="../../../hadoop-yarn/hadoop-yarn-site/NodeManagerRest.html">Node Manager</a> |
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| <a href="../../../hadoop-yarn/hadoop-yarn-site/TimelineServer.html#Timeline_Server_REST_API_v1">Timeline Server</a> |
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| <a href="../../../hadoop-yarn/hadoop-yarn-site/TimelineServiceV2.html#Timeline_Service_v.2_REST_API">Timeline Service V.2</a> |
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| <h5>YARN Service</h5> |
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| <a href="../../../hadoop-yarn/hadoop-yarn-site/yarn-service/Overview.html">Overview</a> |
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| <a href="../../../hadoop-yarn/hadoop-yarn-site/yarn-service/YarnServiceAPI.html">Yarn Service API</a> |
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| <h5>Hadoop Compatible File Systems</h5> |
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| <h5>Reference</h5> |
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| <a href="../../../hadoop-yarn/hadoop-yarn-common/yarn-default.xml">yarn-default.xml</a> |
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| <h1>System Services</h1> |
| <div class="section"> |
| <h2><a name="Overview"></a>Overview</h2> |
| <p>System services are admin configured services which are auto deployed during bootstrap of ResourceManager. This would work only when API-Server is started as part of ResourceManager. Refer <a href="QuickStart.html#Manage_services_on_YARN_via_REST_API">Manage services on YARN</a>. This document describes how to configure and deploy system services.</p></div> |
| <div class="section"> |
| <h2><a name="Configuration"></a>Configuration</h2> |
| <table border="0" class="bodyTable"> |
| <thead> |
| |
| <tr class="a"> |
| <th> Name </th> |
| <th> Description </th></tr> |
| </thead><tbody> |
| |
| <tr class="b"> |
| <td>yarn.service.system-service.dir</td> |
| <td> FS directory path to load and deploy admin configured services. These service spec files should be kept with proper hierarchy.</td></tr> |
| </tbody> |
| </table></div> |
| <div class="section"> |
| <h2><a name="Hierarchy_of_FS_path"></a>Hierarchy of FS path</h2> |
| <p>After configuring <i>yarn.service.system-service.dir</i> path, the spec files should be kept with below hierarchy.</p> |
| |
| <div> |
| <div> |
| <pre class="source">$SYSTEM_SERVICE_DIR_PATH/<Launch-Mode>/<Users>/<Yarnfiles>. |
| </pre></div></div> |
| |
| <div class="section"> |
| <h3><a name="Launch-Mode"></a>Launch-Mode</h3> |
| <p>Launch-Mode indicates that how the service should be deployed. Services can be auto deployed either synchronously or asynchronously.</p> |
| <div class="section"> |
| <h4><a name="sync"></a>sync</h4> |
| <p>These services are started synchronously along with RM. This might delay a bit RM transition to active period. This is useful when deploying critical services to get started sooner.</p></div> |
| <div class="section"> |
| <h4><a name="async"></a>async</h4> |
| <p>These services are started asynchronously without impacting RM transition period.</p></div></div> |
| <div class="section"> |
| <h3><a name="Users"></a>Users</h3> |
| <p>Users are the owner of the system service who has full access to modify it. Each users can own multiple services. Note that service names are unique per user.</p></div> |
| <div class="section"> |
| <h3><a name="Yarnfiles"></a>Yarnfiles</h3> |
| <p>YarnFiles are the spec files to launch services. These files must have .yarnfile extension otherwise those files are ignored.</p></div> |
| <div class="section"> |
| <h3><a name="Example_of_hierarchy_to_configure_system_services."></a>Example of hierarchy to configure system services.</h3> |
| |
| <div> |
| <div> |
| <pre class="source">SYSTEM_SERVICE_DIR_PATH |
| |---- sync |
| | |--- user1 |
| | | |---- service1.yarnfile |
| | | |---- service2.yarnfile |
| | |--- user2 |
| | | |---- service3.yarnfile |
| | | .... |
| | | |
| |---- async |
| | |--- user3 |
| | | |---- service1.yarnfile |
| | | |---- service2.yarnfile |
| | |--- user4 |
| | | |---- service3.yarnfile |
| | | .... |
| | | |
| </pre></div></div></div></div> |
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