If you want to use LDAP with your Ambari Server then follow the below steps.
Step 1: Stop the Ambari Server to setup LDAP integration
sudo ambari-server stop
Step 2: Run Ambari Server LDAP Setup Command. This will require a bunch of settings to be set. Consult your IT department for your specific settings.
sudo ambari-server setup-ldap
Step 3: Create the groups and users text files and add the users you want to add comma separated to users and groups comma separated to the groups file.
nano ~/groups.txt nano ~/users.txt
Step 4 (Optional): You may need to adjust the “SERVER_API_HOST” value to your ambari server hostname. Default is 127.0.0.1 which is technically your host but sometimes it complains and you need to make this modification.
sudo nano /usr/lib/python2.6/site-packages/ambari_server/serverUtils.py
Step 5: Import Groups/Users from the text files created in step 3. You will need to start the ambari server first.
sudo ambari-server start #Import groups sudo ambari-server sync-ldap --groups groups.txt #Import users sudo ambari-server sync-ldap --users users.txt
Step 6: Login to Ambari and got to manage ambari and you will see your new users and groups.