Re: [Qemu-devel] nbd: Possible regression in 2.9 RCs

[Kashyap Chamarthy]

On Fri, Mar 31, 2017 at 05:49:52PM +0000, Ciprian Barbu wrote:
> Hi,

[...]

> We also use libvirt v1.3.4, which might be a problem, but at least we
> want to understand if the commit in question introduced an obvious
> problem or if it's all in the details.

A tangential question -- Just curious, your environment
seems...interesting: given you are using a bit old (but above the
MIN_LIBVIRT_VERSION for Nova, which is currently 1.2.1) libvirt version,
with *RC2* of QEMU 2.9 with Nova, and testing live migration.  Me
wonders if this some kind of a custom OpenStack environment, or an
official upstream release that you're simply testing with a newer
version of QEMU...


[1]
http://git.openstack.org/cgit/openstack/nova/tree/nova/virt/libvirt/driver.py?id=068d851#n198

> 
> Btw, the qemu command generated by libvirt is this one, sorry about that:
> 
> 2017-03-31 17:40:10.956+0000: starting up libvirt version: 1.3.4, package: 
> 0+amos3~u16.04 (Enea Armband Devops Team <address@hidden> Fri, 13 Jan 2017 
> 02:06:05 +0100), qemu version: 2.8.50(Debian 1:2.9+amos2~u16.04), hostname: 
> node-2.domain.tld
> LC_ALL=C PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin 
> QEMU_AUDIO_DRV=none /usr/bin/kvm -name instance-00000076,debug-threads=on -S 
> -object 
> secret,id=masterKey0,format=raw,file=/var/lib/libvirt/qemu/domain-14-instance-00000076/master-key.aes
>  -machine virt-2.8,accel=kvm,usb=off,gic-version=3 -cpu host -m 256 -realtime 
> mlock=off -smp 1,sockets=1,cores=1,threads=1 -uuid 
> 2812f3c9-f564-499b-a8c7-e9e7ccf24143 -no-user-config -nodefaults -chardev 
> socket,id=charmonitor,path=/var/lib/libvirt/qemu/domain-14-instance-00000076/monitor.sock,server,nowait
>  -mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc,driftfix=slew 
> -no-shutdown -boot strict=on -kernel 
> /var/lib/nova/instances/2812f3c9-f564-499b-a8c7-e9e7ccf24143/kernel -initrd 
> /var/lib/nova/instances/2812f3c9-f564-499b-a8c7-e9e7ccf24143/ramdisk -append 
> 'root=/dev/vda1 rw rootwait console=tty0 console=ttyS0 console=ttyAMA0' 
> -device i82801b11-bridge,id=pci.1,bus=pcie.0,addr=0x1 -device 
> pci-bridge,chassis_nr=2,id=pci.2,bus=pci.1,addr=0x0 -usb -drive 
> file=/var/lib/nova/instances/2812f3c9-f564-499b-a8c7-e9e7ccf24143/disk,format=qcow2,if=none,id=drive-virtio-disk0,cache=none,aio=native
>  -device 
> virtio-blk-device,scsi=off,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1
>  -drive 
> file=/var/lib/nova/instances/2812f3c9-f564-499b-a8c7-e9e7ccf24143/disk.config,format=raw,if=none,id=drive-virtio-disk1,cache=none,aio=native
>  -device virtio-blk-device,scsi=off,drive=drive-virtio-disk1,id=virtio-disk1 
> -netdev tap,fd=27,id=hostnet0 -device 
> virtio-net-device,netdev=hostnet0,id=net0,mac=fa:16:3e:82:0a:2b -serial 
> file:/var/lib/nova/instances/2812f3c9-f564-499b-a8c7-e9e7ccf24143/console.log 
> -serial pty -vnc 0.0.0.0:0 -k en-us -device 
> VGA,id=video0,vgamem_mb=16,bus=pci.2,addr=0x1 -device 
> virtio-balloon-device,id=balloon0 -msg timestamp=on
> Domain id=14 is tainted: high-privileges

[...]


-- 
/kashyap