Hello,
we have a strange problem on a fresh install of CentOS 6.5. On the server we want to use Xen to host paravirtualised guests (the system has no hardware virtualization support). To manage the domain we would like to use libvirt. Xen and libvirt are set up as described here:
http://wiki.centos.org/HowTos/Xen/Xen4QuickStart http://wiki.centos.org/HowTos/Xen/Xen4QuickStart/Xen4Libvirt
When we try to create a new domain this does not work. In /var/log/xen/xend.log we have to the following error:
[2014-01-28 10:23:02 1651] DEBUG (XendDomainInfo:103) XendDomainInfo.create(['vm', ['name', 'ccm'], ['memory', '1024'], ['maxmem', '1024'], ['vcpus', '1'], ['uuid', 'be62b0d3-4911-137f-210f-9b0948828106'], ['bootloader', '/usr/bin/pygrub'], ['on_poweroff', 'destroy'], ['on_reboot', 'restart'], ['on_crash', 'restart'], ['image', ['linux', ['localtime', '0']]], ['localtime', '0'], ['device', ['vbd', ['dev', 'xvda'], ['uname', 'phy:/dev/medusa-vm/ccm'], ['mode', 'w']]], ['device', ['vif', ['mac', '00:16:3e:1c:ee:5b'], ['bridge', 'br0'], ['script', 'vif-bridge'], ['model', 'virtio']]]]) [2014-01-28 10:23:02 1651] DEBUG (XendDomainInfo:2499) XendDomainInfo.constructDomain [2014-01-28 10:23:02 1651] DEBUG (balloon:187) Balloon: 26832188 KiB free; need 16384; done. [2014-01-28 10:23:02 1651] ERROR (XendDomainInfo:2561) (1, 'Operation not permitted') Traceback (most recent call last): File "/usr/lib64/python2.6/site-packages/xen/xend/XendDomainInfo.py", line 2556, in _constructDomain target = self.info.target()) Error: (1, 'Operation not permitted') [2014-01-28 10:23:02 1651] ERROR (XendDomainInfo:488) VM start failed Traceback (most recent call last): File "/usr/lib64/python2.6/site-packages/xen/xend/XendDomainInfo.py", line 473, in start XendTask.log_progress(0, 30, self._constructDomain) File "/usr/lib64/python2.6/site-packages/xen/xend/XendTask.py", line 209, in log_progress retval = func(*args, **kwds) File "/usr/lib64/python2.6/site-packages/xen/xend/XendDomainInfo.py", line 2567, in _constructDomain raise VmError(failmsg) VmError: Creating domain failed: name=ccm [2014-01-28 10:23:02 1651] ERROR (XendDomainInfo:108) Domain construction failed Traceback (most recent call last): File "/usr/lib64/python2.6/site-packages/xen/xend/XendDomainInfo.py", line 106, in create vm.start() File "/usr/lib64/python2.6/site-packages/xen/xend/XendDomainInfo.py", line 473, in start XendTask.log_progress(0, 30, self._constructDomain) File "/usr/lib64/python2.6/site-packages/xen/xend/XendTask.py", line 209, in log_progress retval = func(*args, **kwds) File "/usr/lib64/python2.6/site-packages/xen/xend/XendDomainInfo.py", line 2567, in _constructDomain raise VmError(failmsg) VmError: Creating domain failed: name=ccm [2014-01-28 10:23:02 1651] ERROR (SrvBase:88) Request create failed. Traceback (most recent call last): File "/usr/lib64/python2.6/site-packages/xen/web/SrvBase.py", line 85, in perform return op_method(op, req) File "/usr/lib64/python2.6/site-packages/xen/xend/server/SrvDomainDir.py", line 82, in op_create raise XendError("Error creating domain: " + str(ex)) XendError: Error creating domain: Creating domain failed: name=ccm
Any help is appreciated.
Best regards,
Jens Pelzetter
On Tue, 28 Jan 2014, Jens Pelzetter wrote:
Hello,
we have a strange problem on a fresh install of CentOS 6.5. On the server we want to use Xen to host paravirtualised guests (the system has no hardware virtualization support). To manage the domain we would like to use libvirt. Xen and libvirt are set up as described here:
http://wiki.centos.org/HowTos/Xen/Xen4QuickStart http://wiki.centos.org/HowTos/Xen/Xen4QuickStart/Xen4Libvirt
When we try to create a new domain this does not work. In /var/log/xen/xend.log we have to the following error:
Could you please post the output of xm dmesg?
[2014-01-28 10:23:02 1651] DEBUG (XendDomainInfo:103) XendDomainInfo.create(['vm', ['name', 'ccm'], ['memory', '1024'], ['maxmem', '1024'], ['vcpus', '1'], ['uuid', 'be62b0d3-4911-137f-210f-9b0948828106'], ['bootloader', '/usr/bin/pygrub'], ['on_poweroff', 'destroy'], ['on_reboot', 'restart'], ['on_crash', 'restart'], ['image', ['linux', ['localtime', '0']]], ['localtime', '0'], ['device', ['vbd', ['dev', 'xvda'], ['uname', 'phy:/dev/medusa-vm/ccm'], ['mode', 'w']]], ['device', ['vif', ['mac', '00:16:3e:1c:ee:5b'], ['bridge', 'br0'], ['script', 'vif-bridge'], ['model', 'virtio']]]]) [2014-01-28 10:23:02 1651] DEBUG (XendDomainInfo:2499) XendDomainInfo.constructDomain [2014-01-28 10:23:02 1651] DEBUG (balloon:187) Balloon: 26832188 KiB free; need 16384; done. [2014-01-28 10:23:02 1651] ERROR (XendDomainInfo:2561) (1, 'Operation not permitted') Traceback (most recent call last): File "/usr/lib64/python2.6/site-packages/xen/xend/XendDomainInfo.py", line 2556, in _constructDomain target = self.info.target()) Error: (1, 'Operation not permitted')
Are xend and libvirt running as root? Do you have SELinux enabled?
Thanks for pointing me to xm dmesg. That was the missing part. The server has one of the AMD CPUs affected by this: http://lists.xen.org/archives/html/xen-announce/2012-06/msg00002.html
So we had to add allow_unsafe to the boot line. Now Xen works fine.
Best regards,
Jens Pelzetter
Am 28.01.2014 14:41, schrieb Stefano Stabellini:
On Tue, 28 Jan 2014, Jens Pelzetter wrote:
Hello,
we have a strange problem on a fresh install of CentOS 6.5. On the server we want to use Xen to host paravirtualised guests (the system has no hardware virtualization support). To manage the domain we would like to use libvirt. Xen and libvirt are set up as described here:
http://wiki.centos.org/HowTos/Xen/Xen4QuickStart http://wiki.centos.org/HowTos/Xen/Xen4QuickStart/Xen4Libvirt
When we try to create a new domain this does not work. In /var/log/xen/xend.log we have to the following error:
Could you please post the output of xm dmesg?
[2014-01-28 10:23:02 1651] DEBUG (XendDomainInfo:103) XendDomainInfo.create(['vm', ['name', 'ccm'], ['memory', '1024'], ['maxmem', '1024'], ['vcpus', '1'], ['uuid', 'be62b0d3-4911-137f-210f-9b0948828106'], ['bootloader', '/usr/bin/pygrub'], ['on_poweroff', 'destroy'], ['on_reboot', 'restart'], ['on_crash', 'restart'], ['image', ['linux', ['localtime', '0']]], ['localtime', '0'], ['device', ['vbd', ['dev', 'xvda'], ['uname', 'phy:/dev/medusa-vm/ccm'], ['mode', 'w']]], ['device', ['vif', ['mac', '00:16:3e:1c:ee:5b'], ['bridge', 'br0'], ['script', 'vif-bridge'], ['model', 'virtio']]]]) [2014-01-28 10:23:02 1651] DEBUG (XendDomainInfo:2499) XendDomainInfo.constructDomain [2014-01-28 10:23:02 1651] DEBUG (balloon:187) Balloon: 26832188 KiB free; need 16384; done. [2014-01-28 10:23:02 1651] ERROR (XendDomainInfo:2561) (1, 'Operation not permitted') Traceback (most recent call last): File "/usr/lib64/python2.6/site-packages/xen/xend/XendDomainInfo.py", line 2556, in _constructDomain target = self.info.target()) Error: (1, 'Operation not permitted')
Are xend and libvirt running as root? Do you have SELinux enabled? _______________________________________________ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
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Jens Pelzetter -
Stefano Stabellini