Re: [ovirt-users] Help with a vdsm hook script script?
- Original Message -
From: Karli Sjöberg karli.sjob...@slu.se
To: Paul Jansen vla...@yahoo.com.au
Cc: Users users@ovirt.org
Sent: Friday, June 12, 2015 9:03:01 AM
Subject: Re: [ovirt-users] Help with a vdsm hook script script?
fre 2015-06-12 klockan 06:34 + skrev Paul Jansen:
I have not coded much python, but I'm having a go at trying to get a
vdsm hook script working.
What it is supposed to do is look for a controller of model
'virtio-scsi' in the domxml and change the model to 'ich9-ahci'.
Haven´t looked at the code, but I have a silly question. Are you sure
the VM is configured with virtio-scsi and not virtio-blk? Could be one
of those d'oh! moments...
/K
I've named the script '50_change_scsi_controller' and have placed it
in '/usr/libexec/vdsm/hooks/before_vm_start' on the one (and only)
host in the cluster where I'm doing this testing. I've set the perms
to 755.
I've also added the custom property to my engine like so:
engine-config -s UserDefinedVMProperties='change_scsi_controller=.*'
--cver=3.5
I've restarted the ovirt-engine like so 'service ovirt-engine
restart' , and can now see the custom property in the GUI config for a
powered off VM that is set to boot up into my cluster. I've put a
string into the 'change_scsi_controller' property and booted up the
VM.
The scsi controller model is not changed from 'virtio-scsi' to
'ich9-ahci'
On the host when I look at '/var/log/vdsm/vdsm.log' I can see tha tthe
hook is getting called, but I'm not sure what I need to look at here
specifically? Can anyone assist and possibly tell me what is wrong
here? Is it an issue with my python hook script?
I'm wanting to test an EL5 based install with a scsi disk, and EL5
does not support virtio-scsi.
I should also mention that I know there are issues with migrating VMs
that use the ich9-ahci sata controller and I don't plan to use this
long term. If I do need this functionality I'll likely set up some
Fedora hosts in another cluster and use one of the other scsi
controller types instead - ie: 'lsi53c810', 'lsi53c895a', 'megasas',
'pvscsi'.
Here's the hook script code:
#!/usr/bin/python
import os
import hooking
def main():
if hooking.tobool(os.environ.get('change_scsi_controller')):
newscsiadapter = hooking.read_json()
domxml = hooking.read_domxml()
for controller in domxml.getElementsByTagName('controller'):
filterValue = controller.getAttribute('model')
if filterValue == 'virtio-scsi':
filterValue.setAttribute('model','ich9-ahci')
controller.setAttribute('model','ich9-ahci')
hooking.write_domxml(domxml)
if __name__ == '__main__':
main()
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Re: [ovirt-users] Help with a vdsm hook script script?
fre 2015-06-12 klockan 06:34 + skrev Paul Jansen:
I have not coded much python, but I'm having a go at trying to get a
vdsm hook script working.
What it is supposed to do is look for a controller of model
'virtio-scsi' in the domxml and change the model to 'ich9-ahci'.
Haven´t looked at the code, but I have a silly question. Are you sure
the VM is configured with virtio-scsi and not virtio-blk? Could be one
of those d'oh! moments...
/K
I've named the script '50_change_scsi_controller' and have placed it
in '/usr/libexec/vdsm/hooks/before_vm_start' on the one (and only)
host in the cluster where I'm doing this testing. I've set the perms
to 755.
I've also added the custom property to my engine like so:
engine-config -s UserDefinedVMProperties='change_scsi_controller=.*'
--cver=3.5
I've restarted the ovirt-engine like so 'service ovirt-engine
restart' , and can now see the custom property in the GUI config for a
powered off VM that is set to boot up into my cluster. I've put a
string into the 'change_scsi_controller' property and booted up the
VM.
The scsi controller model is not changed from 'virtio-scsi' to
'ich9-ahci'
On the host when I look at '/var/log/vdsm/vdsm.log' I can see tha tthe
hook is getting called, but I'm not sure what I need to look at here
specifically? Can anyone assist and possibly tell me what is wrong
here? Is it an issue with my python hook script?
I'm wanting to test an EL5 based install with a scsi disk, and EL5
does not support virtio-scsi.
I should also mention that I know there are issues with migrating VMs
that use the ich9-ahci sata controller and I don't plan to use this
long term. If I do need this functionality I'll likely set up some
Fedora hosts in another cluster and use one of the other scsi
controller types instead - ie: 'lsi53c810', 'lsi53c895a', 'megasas',
'pvscsi'.
Here's the hook script code:
#!/usr/bin/python
import os
import hooking
def main():
if hooking.tobool(os.environ.get('change_scsi_controller')):
newscsiadapter = hooking.read_json()
domxml = hooking.read_domxml()
for controller in domxml.getElementsByTagName('controller'):
filterValue = controller.getAttribute('model')
if filterValue == 'virtio-scsi':
filterValue.setAttribute('model','ich9-ahci')
hooking.write_domxml(domxml)
if __name__ == '__main__':
main()
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Users@ovirt.org
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Users mailing list
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[ovirt-users] Help with a vdsm hook script script?
I have not coded much python, but I'm having a go at trying to get a vdsm hook
script working.
What it is supposed to do is look for a controller of model 'virtio-scsi' in
the domxml and change the model to 'ich9-ahci'.I've named the script
'50_change_scsi_controller' and have placed it in
'/usr/libexec/vdsm/hooks/before_vm_start' on the one (and only) host in the
cluster where I'm doing this testing. I've set the perms to 755.I've also
added the custom property to my engine like so: engine-config -s
UserDefinedVMProperties='change_scsi_controller=.*' --cver=3.5I've restarted
the ovirt-engine like so 'service ovirt-engine restart' , and can now see the
custom property in the GUI config for a powered off VM that is set to boot up
into my cluster. I've put a string into the 'change_scsi_controller' property
and booted up the VM.The scsi controller model is not changed from
'virtio-scsi' to 'ich9-ahci'
On the host when I look at '/var/log/vdsm/vdsm.log' I can see tha tthe hook is
getting called, but I'm not sure what I need to look at here specifically? Can
anyone assist and possibly tell me what is wrong here? Is it an issue with my
python hook script?
I'm wanting to test an EL5 based install with a scsi disk, and EL5 does not
support virtio-scsi.
I should also mention that I know there are issues with migrating VMs that use
the ich9-ahci sata controller and I don't plan to use this long term. If I do
need this functionality I'll likely set up some Fedora hosts in another cluster
and use one of the other scsi controller types instead - ie: 'lsi53c810',
'lsi53c895a', 'megasas', 'pvscsi'.
Here's the hook script code:
#!/usr/bin/python
import os
import hooking
def main():
if hooking.tobool(os.environ.get('change_scsi_controller')):
newscsiadapter = hooking.read_json()
domxml = hooking.read_domxml()
for controller in domxml.getElementsByTagName('controller'):
filterValue = controller.getAttribute('model')
if filterValue == 'virtio-scsi':
filterValue.setAttribute('model','ich9-ahci')
hooking.write_domxml(domxml)
if __name__ == '__main__':
main()
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