Bug in pygrub? Boot loader didn't return any data!

Bug in pygrub? Boot loader didn't return any data!

[Christian Tramnitz]

Hello,

after upgrading to Xen 3.4.1 on one of my hosts I have problems starting 
  my PV domUs that are configured to use pygrub.

When issuing "xm create <domU>" I get the following error message:
Boot loader didn't return any data!

Strange enough it worked before and it even still works when invoking xm 
create with "-c" (attached console)...
And yes, the kernel is present on the *first* phy-device.


Here the logs from a xm create (without "-c")
[2009-08-08 13:42:08 9846] DEBUG (XendDomainInfo:92) 
XendDomainInfo.create(['vm', ['name', 'test01'], ['memory', 1536], 
['vcpus', 1], ['on_xend_start', 'ignore'], ['on_xend_stop', 'ignore'], 
['uuid', '6f1ff1af-bff3-4fff-8ff7-1bfffffff0'], ['cpus', '1'], 
['bootloader', '/usr/bin/pygrub'], ['bootloader_args', '-q'], ['image', 
['linux', ['videoram', 4]]], ['s3_integrity', 1], ['device', ['vbd', 
['uname', 'phy:vg00/test_sys'], ['dev', 'xvda1'], ['mode', 'w']]], 
['device', ['vbd', ['uname', 'phy:vg00/test_swap'], ['dev', 'xvda2'], 
['mode', 'w']]], ['device', ['vbd', ['uname', 'phy:vg01/test_transfer'], 
['dev', 'xvdb1'], ['mode', 'w']]], ['device', ['vif', ['bridge', 
'xenbr0'], ['mac', '00:16:3e:af:13:ef']]], ['device', ['vif', ['bridge', 
'xenbr1'], ['mac', '00:16:3e:af:13:f0']]]])
[2009-08-08 13:42:08 9846] DEBUG (XendDomainInfo:2296) 
XendDomainInfo.constructDomain
[2009-08-08 13:42:08 9846] DEBUG (balloon:166) Balloon: 10837396 KiB 
free; need 4096; done.
[2009-08-08 13:42:08 9846] DEBUG (XendDomain:452) Adding Domain: 15
[2009-08-08 13:42:08 9846] DEBUG (XendDomainInfo:2497) 
XendDomainInfo.initDomain: 15 256
[2009-08-08 13:42:08 26472] DEBUG (XendBootloader:113) Launching 
bootloader as ['/usr/bin/pygrub', 
'--output=/var/run/xend/boot/xenbl.857', '-q', '/dev/vg00/test_sys'].
[2009-08-08 13:42:09 9846] ERROR (XendBootloader:214) Boot loader didn't 
return any data!
[2009-08-08 13:42:09 9846] ERROR (XendDomainInfo:476) VM start failed
Traceback (most recent call last):
   File "/usr/lib64/python2.6/site-packages/xen/xend/XendDomainInfo.py", 
line 456, in start
     XendTask.log_progress(31, 60, self._initDomain)
   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 2499, in _initDomain
     self._configureBootloader()
   File "/usr/lib64/python2.6/site-packages/xen/xend/XendDomainInfo.py", 
line 2919, in _configureBootloader
     bootloader_args, kernel, ramdisk, args)
   File "/usr/lib64/python2.6/site-packages/xen/xend/XendBootloader.py", 
line 215, in bootloader
     raise VmError, msg
VmError: Boot loader didn't return any data!
[2009-08-08 13:42:09 9846] DEBUG (XendDomainInfo:2724) 
XendDomainInfo.destroy: domid=15
[2009-08-08 13:42:09 9846] DEBUG (XendDomainInfo:2204) No device model
[2009-08-08 13:42:09 9846] DEBUG (XendDomainInfo:2206) Releasing devices
[2009-08-08 13:42:09 9846] ERROR (XendDomainInfo:97) Domain construction 
failed
Traceback (most recent call last):
   File "/usr/lib64/python2.6/site-packages/xen/xend/XendDomainInfo.py", 
line 95, in create
     vm.start()
   File "/usr/lib64/python2.6/site-packages/xen/xend/XendDomainInfo.py", 
line 456, in start
     XendTask.log_progress(31, 60, self._initDomain)
   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 2499, in _initDomain
     self._configureBootloader()
   File "/usr/lib64/python2.6/site-packages/xen/xend/XendDomainInfo.py", 
line 2919, in _configureBootloader
     bootloader_args, kernel, ramdisk, args)
   File "/usr/lib64/python2.6/site-packages/xen/xend/XendBootloader.py", 
line 215, in bootloader
     raise VmError, msg
VmError: Boot loader didn't return any data!




And here the same domain just invoked with "-c":


[2009-08-08 13:52:00 9846] DEBUG (XendDomainInfo:92) 
XendDomainInfo.create(['vm', ['name', 'test01'], ['memory', 1536], 
['vcpus', 1], ['on_xend_start', 'ignore'], ['on_xend_stop',
'ignore'], ['uuid', '6f1ff1af-bff3-4fff-8ff7-1bfffffff0'], ['cpus', 
'1'], ['bootloader', '/usr/bin/pygrub'], ['bootloader_args', ''], 
['image', ['linux', ['videoram', 4]]], ['s3_int
egrity', 1], ['device', ['vbd', ['uname', 'phy:vg00/test_sys'], ['dev', 
'xvda1'], ['mode', 'w']]], ['device', ['vbd', ['uname', 
'phy:vg00/test_swap'], ['dev', 'xvda2'], ['mode',
  'w']]], ['device', ['vbd', ['uname', 'phy:vg01/test_transfer'], 
['dev', 'xvdb1'], ['mode', 'w']]], ['device', ['vif', ['bridge', 
'xenbr0'], ['mac', '00:16:3e:af:13:ef']]], ['devic
e', ['vif', ['bridge', 'xenbr1'], ['mac', '00:16:3e:af:13:f0']]]])
[2009-08-08 13:52:00 9846] DEBUG (XendDomainInfo:2296) 
XendDomainInfo.constructDomain
[2009-08-08 13:52:00 9846] DEBUG (balloon:166) Balloon: 10837512 KiB 
free; need 4096; done.
[2009-08-08 13:52:00 9846] DEBUG (XendDomain:452) Adding Domain: 16
[2009-08-08 13:52:00 9846] DEBUG (XendDomainInfo:2497) 
XendDomainInfo.initDomain: 16 256
[2009-08-08 13:52:00 26498] DEBUG (XendBootloader:113) Launching 
bootloader as ['/usr/bin/pygrub', 
'--output=/var/run/xend/boot/xenbl.30588', '/dev/vg00/test_sys'].
[2009-08-08 13:52:02 9846] DEBUG (XendDomainInfo:2521) 
_initDomain:shadow_memory=0x0, memory_static_max=0x60000000, 
memory_static_min=0x0.
[2009-08-08 13:52:02 9846] DEBUG (balloon:166) Balloon: 10837396 KiB 
free; need 1579008; done.
[2009-08-08 13:52:02 9846] INFO (image:173) buildDomain os=linux dom=16 
vcpus=1
[2009-08-08 13:52:02 9846] DEBUG (image:659) domid          = 16
[2009-08-08 13:52:02 9846] DEBUG (image:660) memsize        = 1536
[2009-08-08 13:52:02 9846] DEBUG (image:661) image          = 
/var/run/xend/boot/boot_kernel.O4SUz_
[2009-08-08 13:52:02 9846] DEBUG (image:662) store_evtchn   = 1
[2009-08-08 13:52:02 9846] DEBUG (image:663) console_evtchn = 2
[2009-08-08 13:52:02 9846] DEBUG (image:664) cmdline        = 
root=/dev/xvda1 ro console=hvc0
[2009-08-08 13:52:02 9846] DEBUG (image:665) ramdisk        =
[2009-08-08 13:52:02 9846] DEBUG (image:666) vcpus          = 1
[2009-08-08 13:52:02 9846] DEBUG (image:667) features       =
[2009-08-08 13:52:02 9846] DEBUG (image:668) flags          = 0
and so on...


This is on a gentoo x64 system, running Xen 3.4.1-release (own ebuild).


Thanks,
    Christian

Re: Bug in pygrub? Boot loader didn't return any data!

[Christian Tramnitz]

The problem seems to be related to the "-q" (quite) option, when invoked 
standalone I'm getting the following error:


/usr/bin/pygrub -q /dev/vg00/test
Traceback (most recent call last):
   File "/usr/bin/pygrub", line 684, in <module>
     chosencfg = run_grub(file, entry, fs, incfg["args"])
   File "/usr/bin/pygrub", line 538, in run_grub
     log.debug("PyGrub: Default selection is not valid, using first boot 
configuration...")
NameError: global name 'log' is not defined

Re: Re: Bug in pygrub? Boot loader didn't return any data!

[Keir Fraser]

Can you try removing line 538:
       log.debug("PyGrub: Default selection is not valid, using first boot
configuration...")

...from /usr/bin/pygrub? I think its inclusion may be an error.

 -- Keir

On 08/08/2009 16:50, "Christian Tramnitz" <chris.ace@gmx.net> wrote:

> The problem seems to be related to the "-q" (quite) option, when invoked
> standalone I'm getting the following error:
> 
> 
> /usr/bin/pygrub -q /dev/vg00/test
> Traceback (most recent call last):
>    File "/usr/bin/pygrub", line 684, in <module>
>      chosencfg = run_grub(file, entry, fs, incfg["args"])
>    File "/usr/bin/pygrub", line 538, in run_grub
>      log.debug("PyGrub: Default selection is not valid, using first boot
> configuration...")
> NameError: global name 'log' is not defined
> 
> 
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xensource.com
> http://lists.xensource.com/xen-devel

Re: Bug in pygrub? Boot loader didn't return any data!

[Christian Tramnitz]

Keir Fraser wrote:
> Can you try removing line 538:
>        log.debug("PyGrub: Default selection is not valid, using first boot
> configuration...")
> 
> ...from /usr/bin/pygrub? I think its inclusion may be an error.

Yes, that fixes the problem! domU will be created without errors now.


Thanks!
    Christian