[jira] [Created] (AMBARI-8853) Configuration keys in Kerberos descriptors should allow for variable replacement

["Robert Levas (JIRA)" <ji...@apache.org>]

Robert Levas created AMBARI-8853:
------------------------------------

             Summary: Configuration keys in Kerberos descriptors should allow for variable replacement
                 Key: AMBARI-8853
                 URL: https://issues.apache.org/jira/browse/AMBARI-8853
             Project: Ambari
          Issue Type: Task
          Components: ambari-server
    Affects Versions: 2.0.0
            Reporter: Robert Levas
            Assignee: Robert Levas
             Fix For: 2.0.0


Configuration keys in Kerberos descriptors should allow for variable replacement. For example a typical {{configurations}} block may look like 
{code}
"configurations" : [
 "core-site": {
     "hadoop.proxyuser.hive.groups":"${hadoop-env/proxyuser_group}"
   },
  "hive-site": {
   .....
  },
  "webhcat-site": {
  ....
 }
]
{code}

However some configuration keys need to be dynamically generated and should be generated using the existing variable replacement feature in {{org.apache.ambari.server.state.kerberos.AbstractKerberosDescriptor}}.  For example: 
{code}
"configurations": [
  "core-site": {
     "hadoop.proxyuser.${hive-env/hive_user}.groups":"${hadoop-env/proxyuser_group}"
   },
  "hive-site": {
   .....
  },
  "webhcat-site": {
  ....
 }
] 
{code}

The configuration key {{hadoop.proxyuser.$\{hive-env/hive_user\}.groups}} should be processed such that _$\{hive-env/hive_user\}_ is replaced some value like {{hive}} to yield  {{hadoop.proxyuser.hive.groups}} 




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