[ovirt-users] vdsm hook issues

[Dan Yasny]

OK, so the hooking module is included in the vdsm package itself. Please
make sure you have /usr/share/vdsm/hooking.py on the host.

The manual run fails, because it is not running in the vdsm context, and so
the modules imported are the python site-packages and not the submodules
under vdsm.

To make a hook work, you need to place it on the host, make it accessible
to vdsm:kvm, and maybe define a custom property, if you don't want the hook
to just run on every started VM.

On Tue, Jan 12, 2016 at 10:35 AM, Jean-Pierre Ribeauville <
jpribeauville at axway.com> wrote:

> Hi,
>
>
>
> 1°  It’s a full RHEL7 OS.
> 2°
> vdsm-python-zombiereaper-4.16.27-0.el7.centos.noarch
>
> vdsm-python-4.16.27-0.el7.centos.noarch
>
> vdsm-yajsonrpc-4.16.27-0.el7.centos.noarch
>
> vdsm-xmlrpc-4.16.27-0.el7.centos.noarch
>
> vdsm-cli-4.16.27-0.el7.centos.noarch
>
> vdsm-jsonrpc-java-1.0.15-1.el7.noarch
>
> vdsm-jsonrpc-4.16.27-0.el7.centos.noarch
>
> vdsm-4.16.27-0.el7.centos.x86_64
>
>         3°
>
> #!/usr/bin/python
>
> 1)
>
> 2)      import os
>
> 3)      import sys
>
> 4)      import grp
>
> 5)      import pwd
>
> 6)      import traceback
>
> 7)
>
> 8)      import hooking
>
> 9)
>
> 10)   def createChannelElement(domxml):
>
> 11)       '''
>
> 12)       <channel type='unix'>
>
> 13)         <source mode='bind'
> path='//var/lib/libvirt/qemu/VM_RHEL7-1_omnivision_1.agent'/>
>
> 14)         <target type='virtio' name='omnivision_1.agent'/>
>
> 15)       </channel>
>
> 16)       '''
>
> 17)
>
> 18)       channel = domxml.createElement('channel')
>
> 19)       disk.setAttribute('type', 'unix')
>
> 20)
>
> 21)       source = domxml.createElement('source')
>
> 22)       source.setAttribute('mode', 'bind')
>
> 23)
>
> 24)       # find  domain name
>
> 25)       domainame = domxml.getElementsByTagName('name')
>
> 26)
>
> 27)       source.setAttribute('path', '//var/lib/libvirt/qemu/' +
> domainame + '_omnivision_1.agent')
>
> 28)       disk.appendChild(source)
>
> 29)
>
> 30)       target = domxml.createElement('target')
>
> 31)       target.setAttribute('type', 'virtio')
>
> 32)       target.setAttribute('name', 'omnivision_1.agent')
>
> 33)       disk.appendChild(target)
>
> 34)
>
> 35)       return channel
>
> 36)
>
> 37)   try:
>
> 38)      domxml = hooking.read_domxml()
>
> 39)      devices = domxml.getElementsByTagName('devices')[0]
>
> 40)      channeldev = createChannelElement(domxml)
>
> 41)      sys.stderr.write('createChannel: adding xml: %s\n' %
> channeldev.toxml())
>
> 42)      devices.appendChild(channeldev)
>
> 43)
>
> 44)      hooking.write_domxml(domxml)
>
> 45)   except:
>
> 46)      sys.stderr.write('createChannel: [unexpected error]: %s\n' %
>
> 47)      traceback.format_exc())
>
> 48)      sys.exit(2)
>
>
>
>
>
>
>
> Thx for help.
>
>
>
> Regards,
>
>
>
> J.P.
>
>
>
>
>
> *De :* Dan Yasny [mailto:dyasny at gmail.com]
> *Envoyé :* mardi 12 janvier 2016 16:23
> *À :* Jean-Pierre Ribeauville
> *Cc :* users at ovirt.org
> *Objet :* Re: [ovirt-users] vdsm hook issues
>
>
>
> 1. Are you using a full OS or a node?
>
> 2. rpm -qa |grep vdsm
>
> 3. if possible, post the hook code
>
>
>
> Thanks
>
>
>
> On Tue, Jan 12, 2016 at 10:17 AM, Jean-Pierre Ribeauville <
> jpribeauville at axway.com> wrote:
>
>
>
> Hi,
>
>
>
> 1)  is it enough to add a hook.py in
> /usr/libexec/vdsm/hooks/before_vm_start directory , and then shut down and
> reboot a guest to
>
>     see this hook.py invoked ?
>
>
>
> 2) when running manually my hook.py, I got following error :
>
>      ImportError: No module named hooking
>
>
>
>     Do I have to install anything to solve this issue ?
>
>
>
> Thanks for help.
>
>
>
>
>
> Regards,
>
>
>
>
>
>
>
> *J.P. Ribeauville*
>
>
>
> P: +33.(0).1.47.17.20.49
>
> .
>
> Puteaux 3 Etage 5  Bureau 4
>
>
>
> *jpribeauville at axway.com <jpribeauville at axway.com>*
> http://www.axway.com
>
>
>
>
>
> P Pensez à l’environnement avant d’imprimer.
>
>
>
>
>
>
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