Zookeeper service components should indicate security state

The Zookeeper service components should indicate security state when queried by Ambari Agent via STATUS_COMMAND. Each component should determine it's state as follows:

ZOOKEEPER_SERVER

Indicators

• Command JSON
  • config['configurations']['cluster-env']['security_enabled']
    • = “true”
• Configuration File: params.config_dir + '/zookeeper-env.xml'
  • zookeeper_keytab_path
    • not empty
    • path exists and is readable
    • required
  • zookeeper_principal_name
    • not empty
    • required

Pseudocode

if indicators imply security is on and validate
    if kinit(zookeeper_server principal) succeeds
        state = SECURED_KERBEROS
    else
        state = ERROR 
else
    state = UNSECURED

Note: Due to the cost of calling kinit results should be cached for a period of time before retrying. This may be an issue depending on the frequency of the heartbeat timeout.