Without this the installation is successful but the DNS records will not work. With --setup-dns there will be no A record for the host (only an NS record) and the PTR record will point to the domain name. Fixes: https://pagure.io/freeipa/issue/9003 Signed-off-by: Rob Crittenden <rcritten@redhat.com> Reviewed-By: Florence Blanc-Renaud <frenaud@redhat.com>