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How to install Navigator Metadata Server using Python CM Api?

How to install Navigator Metadata Server using Python CM Api?

Explorer

Hi

 

I am trying to add roles for Management Service. I could add all the roles, except Navigator Metadata Server. I get "NullPointerException" as my code touches the create_role for Navigator Metadata Server.

cm_api.api_client.ApiException: <ns1:XMLFault xmlns:ns1="http://cxf.apache.org/bindings/xformat"><ns1:faultstring xmlns:ns1="http://cxf.apache.org/bindings/xformat">java.lang.RuntimeException: java.lang.NullPointerException</ns1:faultstring></ns1:XMLFault> (error 500)

 

The debug logs from Cloudera Manager shows the following error:

Body:
{"items": [{"type": "NAVIGATORMETADATASERVER", "name": "NAVIGATORMETADATASERVER-1", "hostRef": {"hostId": "my-host-name"}}]}
2015-04-23 04:56:37,280 WARN 1161865304@scm-web-140:com.cloudera.cmf.persist.ReadOnlyDatabaseTaskCallable: Error while executing read only database task
java.lang.NullPointerException

 

2015-04-23 04:56:37,282 WARN 1161865304@scm-web-140:org.apache.cxf.phase.PhaseInterceptorChain: Interceptor for {http://api.cloudera.com/}ApiRootResourceImpl has thrown exception, unwinding now
java.lang.RuntimeException: java.lang.NullPointerException

 

Caused by: java.lang.NullPointerException

 

My code is as follows:

 

mgmt = ApiResource(<my_configs_here>).get_cloudera_manager().create_mgmt_service(<my_configs_here>)
mgmt.create_role(navms_role_name + '-1', navms_role_type, cm_host_name)

Any help or pointers would be appreciated.