Since last gentoo world update, app-emulation/qemu updated from 4.1.0-r1 to 4.2.0-r1, my VMs booting from a qcow2 file disk hang with "no bootable disk" message. Other VMs booting from raw iso or raw image file start as usual. Unfortunately, at the moment, I have no time to investigate deeper and I really need some of my qcow2 image VMs. As qemu-4.1.0-rc1 ebuild is not more available in portage tree, I recreated that ebuild on a local repo and restarted my VMs from that previous version.
I don't know what's the issue (current qcow2 working fine for me, but I made/used them only with 4.2.0), but if in a hurry you can convert your images to raw and see if they work. Alternatively, converting from qcow2 to qcow2 may possibly update them to work. "qemu-img convert -O qcow2 old.qcow2 new.qcow2" or "qemu-img convert -O raw old.qcow2 new.img"
It is sad to read that you have problems with the software. The situation seems to be a bit more complicate and requires some analysis. We can not help you efficiently via bug tracker. The bug tracker aims rather on specific problems in .ebuilds and less on individual systems. I have had very good experience on the gentoo IRC [1] with questions like this. Of course there are also forums and mailing lists [2,3]. I hope you understand, that I will close the bug here therefore and wish you good luck on one of the mentioned channels [4]. Please reopen the ticket in order to provide an indication for an specific error in an ebuild or any gentoo related product. [1] https://www.gentoo.org/get-involved/irc-channels/ [2] https://forums.gentoo.org/ [3] https://www.gentoo.org/get-involved/mailing-lists/all-lists.html [4] https://www.gentoo.org/support/
(In reply to Ionen Wolkens from comment #1) > I don't know what's the issue (current qcow2 working fine for me, but I > made/used them only with 4.2.0), but if in a hurry you can convert your > images to raw and see if they work. > > Alternatively, converting from qcow2 to qcow2 may possibly update them to > work. > > "qemu-img convert -O qcow2 old.qcow2 new.qcow2" > or > "qemu-img convert -O raw old.qcow2 new.img" OK, I gave it a try to convert my qcow2 image under qemu-4.2.0-r1 # qemu-img convert -O qcow2 cirrus-v2-k3s-agent-disk-image-cow00-qemu410.qcow2 cirrus-v2-k3s-agent-disk-image-cow00-qemu420.qcow2 It works, the VM now starts without error, but the image size qcow2 increases tenfold from 54 MiB to 545MiB # qemu-img info cirrus-v2-k3s-agent-disk-image-cow00-qemu410.qcow2 image: cirrus-v2-k3s-agent-disk-image-cow00-qemu410.qcow2 file format: qcow2 virtual size: 10 GiB (10737418240 bytes) disk size: 53.9 MiB cluster_size: 65536 backing file: cirrus-v2-k3s-agent-master-disk-image.qcow2 Format specific information: compat: 1.1 lazy refcounts: false refcount bits: 16 corrupt: false qemu-img info cirrus-v2-k3s-agent-disk-image-cow00-qemu420.qcow2 image: cirrus-v2-k3s-agent-disk-image-cow00-qemu420.qcow2 file format: qcow2 virtual size: 10 GiB (10737418240 bytes) disk size: 545 MiB cluster_size: 65536 Format specific information: compat: 1.1 lazy refcounts: false refcount bits: 16 corrupt: false I use qemu/kvm for several years, for me it's the first time I need to convert my qcow2 images. I just looked at 4.2.0 changelog (https://wiki.qemu.org/ChangeLog/4.2), some nbd changes but no mention for an eventual conversion need.
(In reply to Jonas Stein from comment #2) > It is sad to read that you have problems with the software. The situation > seems to be a bit more complicate and requires some analysis. > We can not help you efficiently via bug tracker. The bug tracker aims rather > on specific problems in .ebuilds and less on individual systems. > > I have had very good experience on the gentoo IRC [1] with questions like > this. Of course there are also forums and mailing lists [2,3]. > I hope you understand, that I will close the bug here therefore and wish you > good luck on one of the mentioned channels [4]. > Please reopen the ticket in order to provide an indication for an specific > error in an ebuild or any gentoo related product. > > [1] https://www.gentoo.org/get-involved/irc-channels/ > [2] https://forums.gentoo.org/ > [3] https://www.gentoo.org/get-involved/mailing-lists/all-lists.html > [4] https://www.gentoo.org/support/ OK, I understand, sorry for clumsily posting in the wrong place. But if a qcow2 file conversion is needed after the '.2.0 update, maybe a warning message might be useful.
