Arch Linux

cyberyoung

Member

Registered: 2012-02-12

Posts: 14

after qemu replacing qemu-kvm, libvirt cannot start guest os

virsh # list --all
Id    Name                           State
----------------------------------------------------
-     centos5_i386                   shut off
-     centos6                        shut off
-     ubuntu12.04                    shut off

virsh # start centos5_i386
error: Failed to start domain centos5_i386
error: Cannot check QEMU binary /usr/bin/qemu-kvm: No such file or directory

skanky

Member

From: WAIS

Registered: 2009-10-23

Posts: 1,847

Re: after qemu replacing qemu-kvm, libvirt cannot start guest os

libvirt is trying to start the wrong executable.

$ pacman -Ql qemu | grep /usr/bin

---

"...one cannot be angry when one looks at a penguin."  - John Ruskin
"Life in general is a bit shit, and so too is the internet. And that's all there is." - scepticisle

cyberyoung

Member

Registered: 2012-02-12

Posts: 14

Re: after qemu replacing qemu-kvm, libvirt cannot start guest os

libvirt is trying to start the wrong executable.

$ pacman -Ql qemu | grep /usr/bin

yeah, but this is updated by system, which replace qemu-kvm with qemu, qemu-kvm has /usr/bin/qemu-kvm. I checked the wiki, it said:
Note: qemu-kvm is a fork of qemu which will eventually disappear when all its features become part of qemu.
Note: qemu-kvm no longer exists as all of its features have been merged into qemu.

the 2nd does not exist when I checked the wiki first time today. So I guess 1st sentence is true now, and I should modify the xml configuration of the guest os
<devices>
    <emulator>/usr/bin/qemu-kvm</emulator>
which value should I fill it up? I tried qemu-x86_64, qemu-img, both are wrong.

skanky

Member

From: WAIS

Registered: 2009-10-23

Posts: 1,847

Re: after qemu replacing qemu-kvm, libvirt cannot start guest os

Yes, the two have now merged.

Depends on your system.I'm running qemu-system-x86_64, but that's because my system is 64 bit. You might want the 32 bit one - if you "man qemu" it's the one shown in the usage line.

qemu-img is the image maintenance utility.

(edit -fixed executable name)

Last edited by skanky (2013-03-05 16:31:32)

---

"...one cannot be angry when one looks at a penguin."  - John Ruskin
"Life in general is a bit shit, and so too is the internet. And that's all there is." - scepticisle

cyberyoung

Member

Registered: 2012-02-12

Posts: 14

Re: after qemu replacing qemu-kvm, libvirt cannot start guest os

ok, seems qemu-system-i386, qemu-system-x86_64 are all right.
not sure if it's the answer.

skanky

Member

From: WAIS

Registered: 2009-10-23

Posts: 1,847

Re: after qemu replacing qemu-kvm, libvirt cannot start guest os

Working for me. You may need to revisit your system attributes though. The default devices may have changed.

---

"...one cannot be angry when one looks at a penguin."  - John Ruskin
"Life in general is a bit shit, and so too is the internet. And that's all there is." - scepticisle

cyberyoung

Member

Registered: 2012-02-12

Posts: 14

Re: after qemu replacing qemu-kvm, libvirt cannot start guest os

Yes, the two have now merged.

Depends on your system.I'm running qemu-x86_64, but that's because my system is 64 bit. You might want the 32 bit one - if you "man qemu" it's the one shown in the usage line.

qemu-img is the image maintenance utility.

Thanks. but neither i386 or x86_64 is right for me. As I mentioned earlier, system-i386 and system-x86_64 is right for me.

when I 'man qemu', seems is the manual for qemu-system-i386?

and seems there is wrong in the manual, 'qemu-system-x86_84 --drive file=gluster://192.0.2.1/testvol/a.img', which should be qemu-system-x86_64.

so how should I choose i386 and x86_64, based on host os or guest os? I think should be host os.

skanky

Member

From: WAIS

Registered: 2009-10-23

Posts: 1,847

Re: after qemu replacing qemu-kvm, libvirt cannot start guest os

Yes, the two have now merged.

Depends on your system.I'm running qemu-x86_64, but that's because my system is 64 bit. You might want the 32 bit one - if you "man qemu" it's the one shown in the usage line.

qemu-img is the image maintenance utility.

Thanks. but neither i386 or x86_64 is right for me. As I mentioned earlier, system-i386 and system-x86_64 is right for me.

when I 'man qemu', seems is the manual for qemu-system-i386?

and seems there is wrong in the manual, 'qemu-system-x86_84 --drive file=gluster://192.0.2.1/testvol/a.img', which should be qemu-system-x86_64.

so how should I choose i386 and x86_64, based on host os or guest os? I think should be host os.

Yes sorry, my typo - see my post edit.

It's based on host OS - at least I assume so as that's what I based my decsion on and it works for me.

---

"...one cannot be angry when one looks at a penguin."  - John Ruskin
"Life in general is a bit shit, and so too is the internet. And that's all there is." - scepticisle

codekoala

Member

Registered: 2012-07-03

Posts: 4

Re: after qemu replacing qemu-kvm, libvirt cannot start guest os

I created a symlink to make this easier. All of my VMs are 64-bit.

ln -s /usr/bin/qemu-{system-x86_64,kvm}

Seems to be working great for me. Thanks guys!

cyberyoung

Member

Registered: 2012-02-12

Posts: 14

Re: after qemu replacing qemu-kvm, libvirt cannot start guest os

Yes, the two have now merged.

Depends on your system.I'm running qemu-x86_64, but that's because my system is 64 bit. You might want the 32 bit one - if you "man qemu" it's the one shown in the usage line.

qemu-img is the image maintenance utility.

Thanks. but neither i386 or x86_64 is right for me. As I mentioned earlier, system-i386 and system-x86_64 is right for me.

when I 'man qemu', seems is the manual for qemu-system-i386?

and seems there is wrong in the manual, 'qemu-system-x86_84 --drive file=gluster://192.0.2.1/testvol/a.img', which should be qemu-system-x86_64.

so how should I choose i386 and x86_64, based on host os or guest os? I think should be host os.

Yes sorry, my typo - see my post edit.

It's based on host OS - at least I assume so as that's what I based my decsion on and it works for me.

really thanks for your help.

skanky

Member

From: WAIS

Registered: 2009-10-23

Posts: 1,847

Re: after qemu replacing qemu-kvm, libvirt cannot start guest os

really thanks for your help.

No problem.

---

"...one cannot be angry when one looks at a penguin."  - John Ruskin
"Life in general is a bit shit, and so too is the internet. And that's all there is." - scepticisle