While running foreman-installer, it internally runs foreman_plugin_discovery_spec.rb which tries to get FDI vmlinuz and initrd image from http://yum.theforeman.org/discovery/releases/latest/foreman-discovery-image-latest.el6.iso-vmlinuz which actually get this link http://downloads.theforeman.org/discovery/releases/latest/foreman-discovery-image-latest.el6.iso-vmlinuz , and obviously this link is broken.

I think this link url should be fixed, as because of this foreman-installed fails with "not able to configure foreman discovery".