On Thu, Oct 08, 2015 at 12:06:09PM +0100, Richard W.M. Jones wrote:
I wonder if there's a reason why it is not possible to dump the core of a KVM domain which is set to autodestroy.
$ virsh dump guestfs-4xe592eyqq4rfnk9 /tmp/guestfs-4xe592eyqq4rfnk9.core error: Failed to core dump domain guestfs-4xe592eyqq4rfnk9 to /tmp/guestfs-4xe592eyqq4rfnk9.core error: Requested operation is not valid: domain is marked for auto destroy
All libguestfs domains have the autodestroy flag, but I am trying to debug one which is crashing in the guest (RHBZ#1269779) and having the ability to dump it would be very helpful.
I added the following patch to libvirt, which allowed me to dump the domain with no apparent ill effects.
Yep, I see no reason to block use of the core dump API. Looking at the patch I think this is probably just an over-sight - ie it is merely blocked as an accidental side-effect of us blocking migration. Regards, Daniel -- |: http://berrange.com -o- http://www.flickr.com/photos/dberrange/ :| |: http://libvirt.org -o- http://virt-manager.org :| |: http://autobuild.org -o- http://search.cpan.org/~danberr/ :| |: http://entangle-photo.org -o- http://live.gnome.org/gtk-vnc :|