xenserver first, then Ubuntu 13.04 Openstack? Help
I am extremely confused. I read an article stating that xenserver should be installed then openstack on top of it. I get that...but ubuntu 13.04 comes with Openstack and also I believe the openstack can spawn Xen VMs. How does that work? A xen vm on top of Openstack on top of Xenserver hypervisor? Isn't there a performance hit? or am I not getting this right? Or was there a change in philosophies after some time? Which is the correct way to be able to use the Openstack cloud infrastructure and have Xen and KVM VM's work optimally? My goal is to learn and use the Openstack infrastructure and be able to utilize VM's on about 3 nodes with shared resources. Maybe the Xenserver baseline is not a necessity in this case.