Hello,
I've been testing out qemu-kvm 1.4.2 with virtio-scsi drives and I think I might have encountered a bug. The VM is configured with: 1) a virtio-blk drive, which is the one I want to boot, 2) another virtio-blk cdrom drive and two virtio-scsi drives.
Although I have set the boot=off flag for the virtio-scsi drives, I believe the VM tries two boot off one of these drives, because 1) if I start the VM without initializing these two virtio-scsi devices, it boots off the virtio-blk disk and 2) if I initialize the virtio-scsi drives, the VM stalls during booting.
However, if I use "-boot order=c,menu=on" when starting qemu-kvm, and then enter the boot menu, all devices appear in the list there, and the virtio-scsi drives make it to the top, despite my having set the boot=off flag for the virtio-scsi drives. If I manually choose the virtio-blk drive from the boot menu, the instance boots successfully, even if the virtio-scsi disks are present.
I could get around the issue perhaps by setting proper bootindex priorities, but unfortunately ganeti won't let me choose bootindex value for the disk instances it manages itself (namely the virtio-blk drives).
Here's how ganeti starts the instance:
/usr/bin/qemu-system-x86_64 -machine accel=kvm -name nas.mydomain.tld -m 2560 -smp 1 -pidfile /var/run/ganeti/kvm-hypervisor/pid/nas.mydomain.tld -balloon virtio -daemonize -machine pc-i440fx-1.4 -boot c -drive file=/var/run/ganeti/instance-disks/nas.mydomain.tld:0,format=raw,if=virtio -drive file=/srv/ganeti/isos/FreeNAS-9.1.0-BETA-a9c3cf1-x64.iso,format=raw,media=cdrom,if=virtio -monitor unix:/var/run/ganeti/kvm-hypervisor/ctrl/nas.mydomain.tld.monitor,server,nowait -serial unix:/var/run/ganeti/kvm-hypervisor/ctrl/nas.mydomain.tld.serial,server,nowait -usb -usbdevice tablet -vnc
10.2.24.30:5101 -cpu host -device virtio-scsi-pci,id=scsihw0 -drive file=/dev/sdb,if=none,id=sdb,cache=writeback,boot=off,aio=native -device scsi-hd,drive=sdb,id=scsi1,bus=scsihw0.0,channel=0,scsi-id=0,lun=0,bootindex=100 -drive file=/dev/sdc,if=none,id=sdc,cache=writeback,boot=off,aio=native -device scsi-hd,drive=sdc,id=scsi2,bus=scsihw0.0,channel=0,scsi-id=1,lun=0,bootindex=101 -boot order=c,menu=on -netdev type=tap,id=netdev0,fd=9 -device virtio-net-pci,mac=aa:00:00:3c:89:c2,netdev=netdev0 -qmp unix:/var/run/ganeti/kvm-hypervisor/ctrl/nas.mydomain.tld.qmp,server,nowait -S
Shouldn't this result in only the virtio-blk device being selected for boot, given these arguments, or is this behaviour intended? Thanks.