[jira] [Commented] (YARN-6626) Embed REST API service into RM

["Eric Yang (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/YARN-6626?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16167071#comment-16167071 ] 

Eric Yang commented on YARN-6626:
---------------------------------

This can be done by specifying hadoop-yarn-service-api as dependency to hadoop-yarn-ui project, this will automatically place hadoop-yarn-service-api*.jar and dependencies into WEB-INF/lib of hadoop-yarn-ui war file.  In web.xml file, specify:

{code}
<web-app>
  <display-name>YARN UI</display-name>

  <servlet>
    <servlet-name>REST_API</servlet-name>
    <servlet-class>com.sun.jersey.spi.container.servlet.ServletContainer</servlet-class>
    <init-param>
      <param-name>com.sun.jersey.config.property.packages</param-name>
      <param-value>org.apache.hadoop.yarn.appcatalog.controller;org.apache.hadoop.yarn.service.webapp</param-value>
    </init-param>
    <init-param>
      <param-name>com.sun.jersey.api.json.POJOMappingFeature</param-name>
      <param-value>true</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
  </servlet>

  <servlet-mapping>
    <servlet-name>REST_API</servlet-name>
    <url-pattern>/ws/v2/*</url-pattern>
  </servlet-mapping>
</web-app>
{code}

> Embed REST API service into RM
> ------------------------------
>
>                 Key: YARN-6626
>                 URL: https://issues.apache.org/jira/browse/YARN-6626
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>            Reporter: Gour Saha
>             Fix For: yarn-native-services
>
>
> As of now the deployment model of the Native Services REST API service is standalone. There are several cross-cutting solutions that can be inherited for free (kerberos, HA, ACLs, trusted proxy support, etc.) by the REST API service if it is embedded into the RM process. In fact we can expose the REST API via the same port as RM UI (8088 default). The URI path /services/v1/applications will distinguish the REST API calls from other RM APIs.



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