Rich It is libvirt that adds that flag. I am not exactly sure, starting which version it started to do this. It wasn't doing this in libvirt 0.75. I think starting 0.8 it has started to do this.
Unless specified otherwise, by default libvirt marks driver type as "raw" which gets passed as format flag to kvm. Because of this qcow virtual size is not exposed to the guest. OpenNebula, when it creates the libvirt deployment file, doesn't add any flag. We had to change LibvirtDriver.cc and specifically add type=qcow2 attribute to the driver xml flag, and recompile one. Here is a post regarding the same. http://lists.opennebula.org/htdig.cgi/users-opennebula.org/2010-September/002894.html Ranga On Fri, Oct 22, 2010 at 1:47 PM, Rich Wellner <r...@objenv.com> wrote: > Using RC1 I just ran across a bug that was reported in August. I've > included the text of the email below. I just wanted to give a heads up that > it's still there. The weird part is that I have no idea how it got > triggered. I was able to run images yesterday until about noon. Started > playing around with some other images and from there on out, nothing would > start because one kept requesting the raw flag, including images that had > previously been working. > > > --------------------- PREVIOUS REPORT BELOW ----------------------- > > Hello, > > That is really weird as we have not added a format parameter to the > deployment file we use to create a VM. Could you please send us > $ONE_LOCATION/var/<vm_id>/deployment.0 of one of the VM's that fail? > > Thank you > > On Tue, Aug 24, 2010 at 2:17 PM, Martin Kopta <martin at kopta.eu > <http://lists.opennebula.org/listinfo.cgi/users-opennebula.org>> wrote: > >* Hello,*>**>* I am playing with latest checkout of ONE (branch one-2.0) > >and I found out*>* that my old images aren't working anymore (getting 'no > >bootable device' on*>* display). They were of type 'qcow2' which was no > >problem before (circa 3 weeks*>* ago). Anyway, I noticed that 'kvm' process > >does have 'format=raw' [1], so I*>* converted my images [2] to raw and it > >seems to be working now.*>**>* Hope this helps someone.*>**>* Best > >regards,*>* dum8d0g*>**>* [1] /usr/bin/kvm -S -M pc-0.12 -enable-kvm -m 512 > >-smp 1,sockets=1,cores=1,threads=1 -name one-15 -uuid > >cea35f06-61cc-c87c-75bc-03e8c3cb637d -nodefaults -chardev > >socket,id=monitor,path=/var/lib/libvirt/qemu/one-15.monitor,server,nowait > >-mon chardev=monitor,mode=readline -rtc base=utc -no-acpi -boot c -drive > >file=/home/one/vms/15/images/disk.0,if=none,id=drive-ide0-0-0,boot=on,format=raw > > -device ide-drive,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0 -drive > >file=/home/one/vms/15/images/disk.1,if=none,media=cdrom,id=drive-ide0-1-0,readonly=on,format=raw > > -device ide-drive,bus=ide.1,unit=0,drive=drive-ide0-1-0,id=ide0-1-0 -device > >rtl8139,vlan=0,id=net0,mac=02:00:c0:a8:7a:05,bus=pci.0,addr=0x3 -net > >tap,fd=41,vlan=0,name=hostnet0 -chardev pty,id=serial0 -device > >isa-serial,chardev=serial0 -usb -vnc 0.0.0.0:0 -vga cirrus -device > >virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x4*>* [2] qemu-img convert > >image.qcow2 -O raw image.raw*> > > > > _______________________________________________ > Users mailing list > Users@lists.opennebula.org > http://lists.opennebula.org/listinfo.cgi/users-opennebula.org > >
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