[AMBARI-8853] Configuration keys in Kerberos descriptors should allow for variable replacement

• Type: Task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0.0
• Fix Version/s: 2.0.0
• Component/s: ambari-server
• Labels: kerberos kerberos_descriptor
• Epic Link: Ambari Automated Kerberization
• Assignee: Robert Levas
• Reporter: Robert Levas
• Created: 22/Dec/14 05:19
• Updated: 22/Dec/14 21:10
• Resolved: 22/Dec/14 19:45

Description

Configuration keys in Kerberos descriptors should allow for variable replacement. For example a typical configurations block may look like

"configurations" : [
 "core-site": {
     "hadoop.proxyuser.hive.groups":"${hadoop-env/proxyuser_group}"
   },
  "hive-site": {
   .....
  },
  "webhcat-site": {
  ....
 }
]

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:

"configurations": [
  "core-site": {
     "hadoop.proxyuser.${hive-env/hive_user}.groups":"${hadoop-env/proxyuser_group}"
   },
  "hive-site": {
   .....
  },
  "webhcat-site": {
  ....
 }
] 

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

Issue Links

• links to: ReviewBoard