Deploy custom service on non hadoop node with Apache Ambari

Question

I want to deploy a custom service onto non hadoop nodes using Apache Ambari. I have created a custom service inside /var/lib/ambari-server/resources/common-services as opposed to Hadoop's folder of: /var/lib/ambari-server/resources/stacks/HDP

And then I restarted my ambari-server. But with web, I cannot see my new Service.

Am I missing anything, do I have to register my custom service anywhere?

Hi, I don’t want to hardcode my service version into metainfo.xml, Can I do it?

<service>
  <name>DUMMY_APP</name>
  <displayName>My Dummy APP</displayName>
  <comment>This is a distributed app.</comment>
  <version>0.1</version> --------------This I don't want to hardcode, Can I doit?
  <components>
  ...
  </components>
</service>

I have 1 more question: How can I do hosts specific configuration using apache ambari? Can I do it or whatever configuration I have selected applies for all the hosts? – user1393608 Sep 1 '15 at 7:14 — user1393608, Sep 1 '15 at 7:14

cjackson · Accepted Answer · 2015-08-17 20:04:07Z

You still need to specify in the stack definition that your service is available for that particular stack. Common Services is just a place to maintain a common set of service definitions which can be used as part of a stack definition through extension.

For Example, lets say you have created custom service 'MYSERVICE' with a version identifier of '1.0' and want it to be provided for the HDP 2.2 stack.

You would need to place your service definition at the following location:
```
/var/lib/ambari-server/resources/common-services/MYSERVICE/1.0
```
This above directory would contain your metainfo.xml file and your configuration and package folder. This will be the base definition of your service.

Note: It is also important to note that the version you specify in /var/lib/ambari-server/resources/common-services/MYSERVICE/1.0/metainfo.xml must match the version number you have indicated in the path. For our example that would be <version>1.0</version>.

You will then also need to add an additional metainfo.xml file to the HDP 2.2 stack that will provide this service.

/var/lib/ambari-server/resources/stacks/HDP/2.2/services/MYSERVICE/metainfo.xml

The contents of this file would be:

<?xml version="1.0"?>
<metainfo>
  <schemaVersion>2.0</schemaVersion>
  <services>
    <service>
      <name>MYSERVICE</name>
      <extends>common-services/MYSERVICE/1.0</extends>
    </service>
  </services>
</metainfo>

Thanks Cjackson!!!, but then I will not be able to install my service on bare machine without hadoop? So hadoop stack version is compulsary? I just want my service to be deployed on any OS machine – user1393608 Aug 18 '15 at 5:42 — user1393608, Aug 18 '15 at 5:42
/var/lib/ambari-server/resources/stacks/HDP is not 'Hadoops' folder. It's the Hortonworks Data Platform Stack. You could define your own stack and only list your custom service in that stack. – cjackson Aug 18 '15 at 13:05 — cjackson, Aug 18 '15 at 13:05
Ok one more query, How can I add my custom service to web ui without having to go through installation of new cluster and adding other services? – user1393608 Aug 18 '15 at 13:33 — user1393608, Aug 18 '15 at 13:33
Hi, I don’t want to hardcode my service version into metainfo.xml, Can I do it? <service> <name>DUMMY_APP</name> <displayName>My Dummy APP</displayName> <comment>This is a distributed app.</comment> <version>0.1</version> <components> ... </components> – user1393608 Aug 26 '15 at 12:45 — user1393608, Aug 26 '15 at 12:45
Why don't you want to hardcode it? There has to be a value there. If you explain to me why you don't want to hardcode it and what you're trying to achieve I may be able to help further. – cjackson Aug 27 '15 at 15:34 — cjackson, Aug 27 '15 at 15:34

Deploy custom service on non hadoop node with Apache Ambari

1 Answer