ambari-agent hostname error

ambari-agent hostname error

ERROR 2015-12-22 09:51:40,916 main.py:146 - Ambari agent machine hostname (ip-172-29-2-93.eu-west-1.compute.internal) does not match expected ambari server hostname (namenode1.dscluster200.prod.souq.com). Aborting registration. Please check hostname, hostname -f and /etc/hosts file to confirm your hostname is setup correctly
ERROR 2015-12-22 09:51:40,916 main.py:315 - Fatal exception occurred:
Traceback (most recent call last):
  File "/usr/lib/python2.6/site-packages/ambari_agent/main.py", line 312, in <module>
    main(heartbeat_stop_callback)
  File "/usr/lib/python2.6/site-packages/ambari_agent/main.py", line 265, in main
    perform_prestart_checks(expected_hostname)
  File "/usr/lib/python2.6/site-packages/ambari_agent/main.py", line 147, in perform_prestart_checks
    sys.exit(1)
SystemExit: 1
INFO 2015-12-22 09:51:40,917 ExitHelper.py:53 - Performing cleanup before exiting...
', None)
('    perform_prestart_checks(expected_hostname)
  File "/usr/lib/python2.6/site-packages/ambari_agent/main.py", line 147, in perform_prestart_checks
    sys.exit(1)
SystemExit: 1

gistfile1.txt

vim /etc/ambari-agent/conf/ambari-agent.ini
under [agent]
hostname_script=/etc/ambari-agent/conf/hostname_script.sh
public_hostname_script=/etc/ambari-agent/conf/hostname_script.sh


vim /etc/ambari-agent/conf/hostname_script.sh
#!/bin/bash
echo $(hostname -f)