How to access the YARN UI through knox default gateway port 8443?

[#1]

@Prasad T

You need to configure your Knox topology and add YARNUI service snippet

E.g

<service>
    <role>YARNUI</role>
    <url>http://sandbox.hortonworks.com:8088</url>
</service>

This is a official documentation. The changes should be applied automatically.

With all the other settings unchanged the service has to be accessible from a URL scheme like:

https://{gateway-host}:{gateway-port}/{gateway-path}/{cluster-name}/yarn 

E.g.

https://10.0.0.1:8443/gateway/hdc/yarn/

Hope this helps!

[#2]

We need another service entry with role "YARN" as well with same url. Also in URL scheme, "hdc" is not cluster-name but topology name.

[#3 · Accepted solution]

@Prasad T Please use the xml code below and create a topology file in /etc/knox/conf/topologies directory and replace the YARN_HOSTNAME and YARN_PORT with relevant values. If your newly created topology is named ui.xml, you can access the YARN UI using Web URL: https://KNOX_HOST:KNOX_PORT/gateway/ui/yarn/

 <topology>
    <gateway>
        <provider>
            <role>authentication</role>
            <name>Anonymous</name>
            <enabled>true</enabled>
        </provider>
        <provider>
            <role>identity-assertion</role>
            <name>Default</name>
            <enabled>false</enabled>
        </provider>
    </gateway>
   <service>
        <role>YARN</role>
        <url>http://<YARN_HOSTNAME>:<YARN_PORT></url>
    </service>
    <service>
        <role>YARNUI</role>
        <url>http://<YARN_HOSTNAME>:<YARN_PORT></url>
    </service>
</topology>

[#4]

when i do the above it is asking me username-password when i access the URL..