[ovirt-users] vdsm hook issues

Tue Jan 12 15:55:07 UTC 2016

Hi,

/usr/share/vdsm/hooking.py  is present on my host.

I placed my test_hook.py  in /usr/libexec/vdsm/hooks/before_vm_start

As I want to have it invoked for every started VM ,  I don’t need custom property ; Am I right ?

Remains the point “make it accessible to vdsm:kvm”  what do you mean ?

BTW , are vdsm hooks log infos located in /var/log/vdsm/vdsm.log  ?

Thx for help.

J.P.

De : Dan Yasny [mailto:dyasny at gmail.com]
Envoyé : mardi 12 janvier 2016 16:48
À : Jean-Pierre Ribeauville
Cc : users at ovirt.org
Objet : Re: [ovirt-users] vdsm hook issues

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<mailto: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<mailto:dyasny at gmail.com>]
Envoyé : mardi 12 janvier 2016 16:23
À : Jean-Pierre Ribeauville
Cc : users at ovirt.org<mailto: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<mailto: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<tel:%2B33.%280%29.1.47.17.20.49>
.
Puteaux 3 Etage 5  Bureau 4

jpribeauville at axway.com<mailto:jpribeauville at axway.com>
http://www.axway.com<http://www.axway.com/>

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