Re: VM config file

[Charles Duffy <Charles_Duffy@messageone.com>]

Zhang Qian wrote:
> I'd like to know if there is a configuration file for each KVM virtual
> machine? I can define a domain by "virsh define" command, but where
> the configuraiton parameters are persisted for the VM?

virsh is not a part of kvm, but rather libvirt; you should ask for 
support for it on the libvirt mailing list.

That said -- you can list defined VMs through "virsh list --all", edit 
them through "virsh edit", and dump their XML via "virsh dumpxml". The 
config files are kept in /etc/libvirt/qemu, but you SHOULD NOT edit them 
directly -- just like /etc/sudoers should be edited only through visudo, 
/etc/libvirt/qemu/* should be edited only through libvirt methods (which 
can be accessed through the virsh command); this makes sure libvirtd is 
always aware of any changes, and prevents invalid configuration from 
ever being written to disk.