Re: [Libguestfs] Xen drivers for virt-builder images

Hello everyone, On gio, 2014-06-12 at 08:20 +0100, Richard W.M. Jones wrote: > On Wed, Jun 11, 2014 at 10:02:22PM +0100, George Dunlap wrote: > > On Wed, Jun 11, 2014 at 8:34 PM, Richard W.M. Jones <rjones(a)redhat.com&gt; wrote: > > > Do you know what extra packages have to be installed or commands need > > > to be run to enable Xen drivers in Fedora? > > > > The kernel already has a lot of the Xen stuff enabled. AFAICT from > > looking at the boot output it's just missing those two modules in the > > initrd. (Although it's possible you'll need more.) I'm pretty sure > > they should just come in the normal kernel rpm; there aren't really > > any user-space components necessary for basic functionality of a Xen > > guest. (There are a few tools which someone might want to install for > > one purpose or another -- tools for querying Xen state or acting as a > > "driver domain" -- but they're something that should be added as > > needed, not in the core.) > > I suspect we may need to run a dracut command in %post. Something > like: > > dracut --add-drivers "some list of xen kmods ..." > > I'm not sure which Xen drivers are required. The Fedora 21 kernel has > 13 files named 'xen*.ko.xz'. > So, first of all, forgive my libguestfs / virt-builder ignorance. :-) About the modules, what I know is that if I point virt-install to this location: http://mirror.euserv.net/linux/fedora/linux/releases/20/Fedora/x86_64/os/ it just works, i.e., the installer is able to see the virtual disk and network interface while running in a Xen (PV) guest. Looking inside the initrd.img that the above uses, here's what I find: $ find lib/modules/3.11.10-301.fc20.x86_64/ -iname xen* lib/modules/3.11.10-301.fc20.x86_64/kernel/drivers/block/xen-blkfront.ko lib/modules/3.11.10-301.fc20.x86_64/kernel/drivers/net/xen-netback lib/modules/3.11.10-301.fc20.x86_64/kernel/drivers/net/xen-netback/xen-netback.ko lib/modules/3.11.10-301.fc20.x86_64/kernel/drivers/net/xen-netfront.ko