Red Hat Enterprise IPA relies on a script to automate many of the installation tasks. This script makes a number of assumptions:
System:
That you are performing the installation on a "clean" system. The script overwrites a number of files without prompting for confirmation. Section 3.2, “Configuring the IPA Server” lists the services whose scripts and configuration files are modified.
Directory Server:
That there are no existing Directory Server instances. No automatic upgrade facility from an existing Directory Server currently exists. Any migration requirements should be referred to Red Hat Global Professional Services.
DNS:
That the server's machine name be set, and that it resolves to its public IP address (not to localhost).
That DNS be correctly configured to resolve forward and reverse addresses. The DNS does not need to be on the same machine as the IPA server, but it does need to be fully functional.