[Users] modifying vmdisk hook

[Shahar Havivi]

On 05.06.12 16:57, Nathanaël Blanchet wrote:
> I cloned the git tree and copied the script in
> /usr/libexec/vdsm/hooks/before_vm_start/
you need to make rpm that will install the scripts properly with the right
permissions and other files.
like that:
$ ./autogen.sh --system --enable-hooks
$ make rpm

> 
> Le 05/06/2012 16:27, Shahar Havivi a écrit :
> >On 05.06.12 16:21, Nathanaël Blanchet wrote:
> >>Hi,
> >>
> >>when executing several hook, I always have this issue in the vdsm logs :
> >>File "/usr/libexec/vdsm/hooks/before_vm_start/40_directlun", line 9,
> >>in<module>
> >>from vdsm import utils
> >>ImportError: No module named vdsm
> >>
> >>and the vm refuses to boot
> >>
> >>how to correct this ?
> >how did you install this?
> >>
> >>Le 04/06/2012 17:16, Shahar Havivi a écrit :
> >>>On 04.06.12 17:03, Nathanaël Blanchet wrote:
> >>>>Hello,
> >>>>
> >>>>I'm testing hooks in vdsm and I need some help on modifying one of
> >>>>your pyhton script : vmdisk (http://gerrit.ovirt.org/gitweb?p=vdsm.git;a=blob;f=vdsm_hooks/vmdisk/before_vm_start.py;h=191d5c1af533e11d699b1d715d3c1ea60e28b787;hb=6817f1c6e3f5bc137d1f3bef45a2d0191465c7a3)
> >>>>the hook works great and I'm able now to attach a file device as a
> >>>>second disk. But I want this disk to be the first bootable disk
> >>>>instead of the block device one created into the engine. In order to
> >>>>change the boot order of the disk, I added those lines:
> >>>>
> >>>>...
> >>>>source = domxml.createElement('source')
> >>>>source.setAttribute('file', devpath)
> >>>>disk.appendChild(source)
> >>>>
> >>>>boot = domxml.createElement('boot')
> >>>>boot.setAttribute('order', 1)
> >>>>disk.appendChild(boot)
> >>>>
> >>>>  # find a name for vdXXX
> >>>>.....
> >>>>
> >>>>So the hook permit<boot order=1>   item
> >>>>(http://libvirt.org/formatdomain.html#elementsDisks)
> >>>>
> >>>>But the vm refuses booting without any logs anywhere...
> >>>>
> >>>>What is wrong?
> >>>>
> >>>>Thanks for your help
> >>>Hi,
> >>>1. try to change the number to string:
> >>>     boot.setAttribute('order', '1')
> >>>2. you have a libvirt log at /var/log/libvirt/qemu/youvmname.log
> >>>3. when the script enumerate all the disks you need to change the other disk
> >>>    boot order:
> >>>    for d in xmldisks:
> >>>      # here look in each disk for boot element and change its order attribute
> >>>      # to other number, ie 2, 3 ...
> >>>
> >>>
> >>>>-- 
> >>>>Nathanaël Blanchet
> >>>>
> >>>>Supervision réseau
> >>>>Pôle exploitation et maintenance
> >>>>Département des systèmes d'information
> >>>>227 avenue Professeur-Jean-Louis-Viala
> >>>>34193 MONTPELLIER CEDEX 5 	
> >>>>Tél. 33 (0)4 67 54 84 55
> >>>>Fax  33 (0)4 67 54 84 14
> >>>>blanchet at abes.fr
> >>>>
> >>-- 
> >>Nathanaël Blanchet
> >>
> >>Supervision réseau
> >>Pôle exploitation et maintenance
> >>Département des systèmes d'information
> >>227 avenue Professeur-Jean-Louis-Viala
> >>34193 MONTPELLIER CEDEX 5 	
> >>Tél. 33 (0)4 67 54 84 55
> >>Fax  33 (0)4 67 54 84 14
> >>blanchet at abes.fr
> >>
> 
> -- 
> Nathanaël Blanchet
> 
> Supervision réseau
> Pôle exploitation et maintenance
> Département des systèmes d'information
> 227 avenue Professeur-Jean-Louis-Viala
> 34193 MONTPELLIER CEDEX 5 	
> Tél. 33 (0)4 67 54 84 55
> Fax  33 (0)4 67 54 84 14
> blanchet at abes.fr
>