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Re: [Libvir] Issue with creating domains that use pygrub



NM - found it.  The grub.conf in the image was configured with
'root=LABEL=/' and the label on the disk image didn't match.  Works now...

Thanks,

C. Halstead <chris sourcelabs com>
SourceLabs - http://www.sourcelabs.com
Dependable Open Source Systems


On 1/30/07 10:51 AM, "Daniel P. Berrange" <berrange redhat com> wrote:

> On Tue, Jan 30, 2007 at 10:39:05AM -0800, Chris Halstead wrote:
>> I'm stumped.  I'm trying to automate creation of domains through libvirt and
>> the Python bindings, but I'm having trouble getting things to work when
>> using pygrub.
>> 
>> If I define an XML-described domain and use
>> <bootloader>/usr/bin/pygrub</bootloader> the domain tries to start and then
>> immediately crashes.  Using explicit local-pathed vmlinuz/initrd without the
>> bootloader element works just fine.  Am I missing something?
> 
> Not sure - which bit crashes ? Pygrub, or XenD, or the guest kernel ? If
> there's any interesting looking stuff in xend.log or xend-debug.log please
> post it to the list.
> 
> Oh also, what version of xen & python are you using - there's crash with
> Xen 3.0.4 or later when using with python 2.5
> 
> Regards,
> Dan.

[2007-01-30 10:51:01 xend.XendDomainInfo 2664] DEBUG (XendDomainInfo:190) XendDomainInfo.create(['vm', ['name', 'test-scripting'], ['memory', '256'], ['maxmem', '256'], ['vcpus', '2'], ['uuid', 'aba3ea8c35bf46b56f70ea18f91cf007'], ['bootloader', '/usr/bin/pygrub'], ['on_poweroff', 'destroy'], ['on_reboot', 'restart'], ['on_crash', 'destroy'], ['device', ['vbd', ['dev', 'xvda1'], ['uname', 'file:/var/xen/test/root.img'], ['mode', 'w']]], ['device', ['vbd', ['dev', 'xvdb1'], ['uname', 'file:/var/xen/test/swap.img'], ['mode', 'w']]], ['device', ['vif', ['mac', '00:16:3e:5d:3d:28'], ['script', 'vif-bridge']]]])
[2007-01-30 10:51:01 xend.XendDomainInfo 2664] DEBUG (XendDomainInfo:296) parseConfig: config is ['vm', ['name', 'test-scripting'], ['memory', '256'], ['maxmem', '256'], ['vcpus', '2'], ['uuid', 'aba3ea8c35bf46b56f70ea18f91cf007'], ['bootloader', '/usr/bin/pygrub'], ['on_poweroff', 'destroy'], ['on_reboot', 'restart'], ['on_crash', 'destroy'], ['device', ['vbd', ['dev', 'xvda1'], ['uname', 'file:/var/xen/test/root.img'], ['mode', 'w']]], ['device', ['vbd', ['dev', 'xvdb1'], ['uname', 'file:/var/xen/test/swap.img'], ['mode', 'w']]], ['device', ['vif', ['mac', '00:16:3e:5d:3d:28'], ['script', 'vif-bridge']]]]
[2007-01-30 10:51:01 xend.XendDomainInfo 2664] DEBUG (XendDomainInfo:395) parseConfig: result is {'shadow_memory': None, 'uuid': 'aba3ea8c35bf46b56f70ea18f91cf007', 'on_crash': 'destroy', 'on_reboot': 'restart', 'localtime': None, 'image': None, 'on_poweroff': 'destroy', 'bootloader_args': None, 'cpus': None, 'name': 'test-scripting', 'backend': [], 'vcpus': 2, 'cpu_weight': None, 'features': None, 'vcpu_avail': None, 'memory': 256, 'device': [('vbd', ['vbd', ['dev', 'xvda1'], ['uname', 'file:/var/xen/test/root.img'], ['mode', 'w']]), ('vbd', ['vbd', ['dev', 'xvdb1'], ['uname', 'file:/var/xen/test/swap.img'], ['mode', 'w']]), ('vif', ['vif', ['mac', '00:16:3e:5d:3d:28'], ['script', 'vif-bridge']])], 'bootloader': '/usr/bin/pygrub', 'cpu': None, 'maxmem': 256}
[2007-01-30 10:51:01 xend.XendDomainInfo 2664] DEBUG (XendDomainInfo:1253) XendDomainInfo.construct: None
[2007-01-30 10:51:01 xend.XendDomainInfo 2664] DEBUG (XendDomainInfo:1285) XendDomainInfo.initDomain: 38 1.0
[2007-01-30 10:51:01 xend 2664] INFO (image:214) configuring linux guest
[2007-01-30 10:51:01 xend 2664] DEBUG (balloon:127) Balloon: 655352 KiB free; need 262144; done.
[2007-01-30 10:51:01 xend 2664] INFO (image:138) buildDomain os=linux dom=38 vcpus=2
[2007-01-30 10:51:01 xend 2664] DEBUG (image:193) dom            = 38
[2007-01-30 10:51:01 xend 2664] DEBUG (image:194) image          = /var/lib/xen/vmlinuz.ZxFySv
[2007-01-30 10:51:01 xend 2664] DEBUG (image:195) store_evtchn   = 1
[2007-01-30 10:51:01 xend 2664] DEBUG (image:196) console_evtchn = 2
[2007-01-30 10:51:01 xend 2664] DEBUG (image:197) cmdline        =  ro root=LABEL=/
[2007-01-30 10:51:01 xend 2664] DEBUG (image:198) ramdisk        = /var/lib/xen/initrd.cqjEQg
[2007-01-30 10:51:01 xend 2664] DEBUG (image:199) vcpus          = 2
[2007-01-30 10:51:01 xend 2664] DEBUG (image:200) features       = 
[2007-01-30 10:51:01 xend 2664] DEBUG (blkif:24) exception looking up device number for xvda1: [Errno 2] No such file or directory: '/dev/xvda1'
[2007-01-30 10:51:01 xend 2664] DEBUG (DevController:110) DevController: writing {'backend-id': '0', 'virtual-device': '51713', 'device-type': 'disk', 'state': '1', 'backend': '/local/domain/0/backend/vbd/38/51713'} to /local/domain/38/device/vbd/51713.
[2007-01-30 10:51:01 xend 2664] DEBUG (DevController:112) DevController: writing {'domain': 'test-scripting', 'frontend': '/local/domain/38/device/vbd/51713', 'dev': 'xvda1', 'state': '1', 'params': '/var/xen/test/root.img', 'mode': 'w', 'online': '1', 'frontend-id': '38', 'type': 'file'} to /local/domain/0/backend/vbd/38/51713.
[2007-01-30 10:51:01 xend 2664] DEBUG (blkif:24) exception looking up device number for xvdb1: [Errno 2] No such file or directory: '/dev/xvdb1'
[2007-01-30 10:51:01 xend 2664] DEBUG (DevController:110) DevController: writing {'backend-id': '0', 'virtual-device': '51729', 'device-type': 'disk', 'state': '1', 'backend': '/local/domain/0/backend/vbd/38/51729'} to /local/domain/38/device/vbd/51729.
[2007-01-30 10:51:01 xend 2664] DEBUG (DevController:112) DevController: writing {'domain': 'test-scripting', 'frontend': '/local/domain/38/device/vbd/51729', 'dev': 'xvdb1', 'state': '1', 'params': '/var/xen/test/swap.img', 'mode': 'w', 'online': '1', 'frontend-id': '38', 'type': 'file'} to /local/domain/0/backend/vbd/38/51729.
[2007-01-30 10:51:01 xend 2664] DEBUG (DevController:110) DevController: writing {'backend-id': '0', 'mac': '00:16:3e:5d:3d:28', 'handle': '0', 'state': '1', 'backend': '/local/domain/0/backend/vif/38/0'} to /local/domain/38/device/vif/0.
[2007-01-30 10:51:01 xend 2664] DEBUG (DevController:112) DevController: writing {'domain': 'test-scripting', 'handle': '0', 'script': '/etc/xen/scripts/vif-bridge', 'state': '1', 'frontend': '/local/domain/38/device/vif/0', 'mac': '00:16:3e:5d:3d:28', 'online': '1', 'frontend-id': '38'} to /local/domain/0/backend/vif/38/0.
[2007-01-30 10:51:01 xend.XendDomainInfo 2664] DEBUG (XendDomainInfo:712) Storing VM details: {'shadow_memory': '0', 'uuid': 'aba3ea8c35bf46b56f70ea18f91cf007', 'on_reboot': 'restart', 'start_time': '1170183061.89', 'on_poweroff': 'destroy', 'name': 'test-scripting', 'xend/restart_count': '0', 'vcpus': '2', 'vcpu_avail': '3', 'memory': '256', 'on_crash': 'destroy', 'image': "(linux (kernel /var/lib/xen/vmlinuz.ZxFySv) (ramdisk /var/lib/xen/initrd.cqjEQg) (args 'ro root=LABEL=/'))", 'maxmem': '256'}
[2007-01-30 10:51:01 xend.XendDomainInfo 2664] DEBUG (XendDomainInfo:747) Storing domain details: {'console/ring-ref': '133179', 'console/port': '2', 'name': 'test-scripting', 'console/limit': '1048576', 'vm': '/vm/aba3ea8c35bf46b56f70ea18f91cf007', 'domid': '38', 'cpu/0/availability': 'online', 'memory/target': '262144', 'store/ring-ref': '133180', 'cpu/1/availability': 'online', 'store/port': '1'}
[2007-01-30 10:51:01 xend.XendDomainInfo 2664] DEBUG (XendDomainInfo:933) XendDomainInfo.handleShutdownWatch
[2007-01-30 10:51:02 xend 2664] DEBUG (DevController:143) Waiting for devices vif.
[2007-01-30 10:51:02 xend 2664] DEBUG (DevController:149) Waiting for 0.
[2007-01-30 10:51:02 xend 2664] DEBUG (DevController:464) hotplugStatusCallback /local/domain/0/backend/vif/38/0/hotplug-status.
[2007-01-30 10:51:02 xend 2664] DEBUG (DevController:464) hotplugStatusCallback /local/domain/0/backend/vif/38/0/hotplug-status.
[2007-01-30 10:51:02 xend 2664] DEBUG (DevController:478) hotplugStatusCallback 1.
[2007-01-30 10:51:02 xend 2664] DEBUG (DevController:143) Waiting for devices usb.
[2007-01-30 10:51:02 xend 2664] DEBUG (DevController:143) Waiting for devices vbd.
[2007-01-30 10:51:02 xend 2664] DEBUG (DevController:149) Waiting for 51713.
[2007-01-30 10:51:02 xend 2664] DEBUG (DevController:464) hotplugStatusCallback /local/domain/0/backend/vbd/38/51713/hotplug-status.
[2007-01-30 10:51:02 xend 2664] DEBUG (DevController:464) hotplugStatusCallback /local/domain/0/backend/vbd/38/51713/hotplug-status.
[2007-01-30 10:51:02 xend 2664] DEBUG (DevController:478) hotplugStatusCallback 1.
[2007-01-30 10:51:02 xend 2664] DEBUG (DevController:149) Waiting for 51729.
[2007-01-30 10:51:02 xend 2664] DEBUG (DevController:464) hotplugStatusCallback /local/domain/0/backend/vbd/38/51729/hotplug-status.
[2007-01-30 10:51:03 xend 2664] DEBUG (DevController:464) hotplugStatusCallback /local/domain/0/backend/vbd/38/51729/hotplug-status.
[2007-01-30 10:51:03 xend 2664] DEBUG (DevController:478) hotplugStatusCallback 1.
[2007-01-30 10:51:03 xend 2664] DEBUG (DevController:143) Waiting for devices irq.
[2007-01-30 10:51:03 xend 2664] DEBUG (DevController:143) Waiting for devices pci.
[2007-01-30 10:51:03 xend 2664] DEBUG (DevController:143) Waiting for devices ioports.
[2007-01-30 10:51:03 xend 2664] DEBUG (DevController:143) Waiting for devices tap.
[2007-01-30 10:51:03 xend 2664] DEBUG (DevController:143) Waiting for devices vtpm.
[2007-01-30 10:51:03 xend 2664] INFO (XendDomain:370) Domain test-scripting (38) unpaused.
[2007-01-30 10:51:04 xend.XendDomainInfo 2664] WARNING (XendDomainInfo:875) Domain has crashed: name=test-scripting id=38.
[2007-01-30 10:51:04 xend.XendDomainInfo 2664] DEBUG (XendDomainInfo:1449) XendDomainInfo.destroy: domid=38
[2007-01-30 10:51:04 xend.XendDomainInfo 2664] DEBUG (XendDomainInfo:1457) XendDomainInfo.destroyDomain(38)
<domain type='xen'>
  <name>test-scripting</name>
  <bootloader>/usr/bin/pygrub</bootloader>
  <os>
    <type>linux</type>
<!--
    <kernel>/var/xen/test/vmlinuz</kernel>
    <initrd>/var/xen/test/initrd</initrd>
    <cmdline> ro root=LABEL=/</cmdline>
-->
    <root>/dev/xvda1</root>
  </os>
  <memory>262144</memory>
  <vcpu>2</vcpu>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>restart</on_reboot> 
  <on_crash>destroy</on_crash>
  <devices>
    <interface type='bridge'>
      <source bridge='xenbr0'/>
      <mac address='00:16:3e:75:fb:4a'/>
      <script path='/etc/xen/scripts/vif-bridge'/>
    </interface>
    <disk type='file' device='disk'>
      <source file='/var/xen/test/root.img'/>
      <target dev='xvda1'/>
    </disk>
    <disk type='file' device='disk'>
      <source file='/var/xen/test/swap.img'/>
      <target dev='xvdb1'/>
    </disk> 
    <console tty='/dev/pts/7'/>
  </devices>
</domain>
#!/usr/bin/python

import libvirt

conn = libvirt.open(None)

xmlDefFile = open('./xendef2.xml', 'r')

xmlDef = ""

for line in xmlDefFile:
  xmlDef = xmlDef + (line.split('\n')[0]).strip()

conn.createLinux(xmlDef, 0)
Nothing to flush.
xenstore-read: couldn't read path backend/vbd/3/51729/node
xenstore-read: couldn't read path backend/vbd/3/51713/node
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