does this lib support creating a new VM/domain

[ericfanye]

Hi there,

I'm trying to use this lib to manage the KVM server.
but I wonder if there is any feature to define a new domain? similar as:
virsh define ***.xml
or create a VM, similar as:
virt-install?

Thanks in advance!!

Eric

[fmenabe]

Hi

For your information, there is no real documentation but there is a page with examples: https://github.com/fmenabe/python-kvm/blob/master/doc/source/examples.rst

This module is essentially a wrapper to the virsh and almost all commands are implemented. You can look at the JSON file (https://github.com/fmenabe/python-kvm/blob/master/kvm/kvm.json)
that map functions (in properties) to virsh commands and indicate how outputs are parsed.

Defining a domain from an XML file is possible:

    import unix, kvm
    host = kvm.Hypervisor(unix.Local())
    host.domain.define('/path/to/the/file.xml')

There is nothing like virt-install in the module! But if you want to use virt-install the unix module (on which this module is based) allows to execute any command (even interactively):

    import unix, kvm
    host = kvm.Hypervisor(unix.Local())
    host.execute('virt-install', INTERACTIVE=True,
                 name='debian8', memory=2048, vcpu=1,
                 disk='path=/vm/disk/debian8.qcow2,size=5',
                 os_type='linux', os_variant='generic',
                 network='bridge=virbr0', graphics='none',
                 console='pty,target_type=serial',
                 location='http://ftp.nl.debian.org/debian/dists/jessie/main/installer-amd64/',
                 extra_args="'console=ttyS0,115200n8 serial'")

Where I work, we had (we are in the process of migrating to OpenNebula) another approach. We created models (basic installation of a system with partitionning), that were copied to the designated hypervisor and then the image was locally mounted (using qemu-nbd) and updated (there's functions in the unix module for chrooting and managing configuration of some OS).

François

[ericfanye]

Bonjour Monsieur!

Thank you for your great help! And we are taking the solution of sending commands to the host.

Merci beaucoup!

Eric