Execute scripts before VM creation

[atodorov_storpool (Anton Todorov)]

Hi,

@Murasakiiru

If somebody can explain me how to do this : you can track which TM_MAD script is executed before that and dump-and-copy the VM config XML to the desired XEN host. Then parse the VM XML in the vmm/deploy. and why is this useful in my case.

As someone that suggested above here is my answer:

The simple solution to have access to the VM info in OpenNebula you must query needed info locally on the front-end. In the common configuration there are disks managed and provided by OpenNebula. In this case there are TM_MAD scripts executed on the front-end before deploying the VM. You said that you have no such disks - everything is over NFS. So I agree that this is not a solution in your case.

IMO @cmartin already pointed you to the proper solution.

Following the mentioned documentation you must configure the one_vmm_exec script in your VM_MAD configuration for xen to run local deploy via the -l argument. Something like:

VM_MAD = [
...
argumets = " ... -l deploy=local_deploy_script"
...
]

Then in your local_deploy_script you will have access to the entire VM (onevm show $2) info but you must take care to do all needed remote commands to the ZFS and XEN host to deploy the VM.

I hope this helps.

Kind Regards,
Anton Todorov