Per RHEL documentation it is possible to edit the grub2 prior to launching the installer, in case special options are needed ahead of time.  The same holds true for CentOS.When I point virt-install to a local ISO image, by the time I can launch a remote virt-manager instance, the installer proceeded past the option to set grub2 options (there is a several second delay).   Is there any way to pass grub2 options to the installer using virt-install?  
Setting grub2 boot options for RHEL7 installer with virt-install
system installation;grub2;virtual machine;kvm