On 24/07/12 12:15, Christophe Fergeau wrote:
Hey,
I've blogged yesterday about the recent work I've done to add oVirt support
to GNOME Boxes ( https://live.gnome.org/Boxes/ ) using oVirt REST API:
http://cfergeau.blogspot.fr/2012/07/outside-boxes.html
That's great, looks good.
« Outside Boxes
oVirt
Let's start this post with a quick presentation of oVirt (you'll understand
why in a few paragraphs...).
oVirt is a free project providing management, monitoring and provisioning
of KVM virtual machines on multiple hosts. It comes with a web interface to
create and manage virtual machines, hypervisor nodes, storage, ... and with
a user portal for those who just want to connect to an already existing
virtual machine.
The way the user portal works is that you log into the portal from your
browser, then you choose the virtual machine you want to connect to, and a
browser plugin will take over and spawn an external binary (these days it's
remote-viewer)
oVirt also comes with an extensive REST API which lets you do
programmatically the same thing as you can do from oVirt web UIs. Moreover,
it has an extensive documentation.
But what about GNOME?
And now we are finally coming as to why I'm talking about all of this :)
Lately, I've been hacking on Boxes, and since one of its goals is to view,
access, and use shared connection / machine, I've decided it would be fun
to make it support oVirt connections! This would make it easier for Boxes
users to connect to oVirt virtual machines without having to go through
their browser.
librest already provides a good low-level GObject library to access REST
services (though it was missing authentication support), so I used it to
build a higher level library which wraps the oVirt REST accesses:
libgovirt. This library uses GObject and gobject-introspection, which gives
bindings to several other languages for free (including vala which is
needed for Boxes). It also provides asynchronous methods for all its remote
operations.
The library is still young and only implements the few REST operations I
needed (list oVirt virtual machines, get VM connection details, generate
temporary VM display password, ...), but this is enough for Boxes needs ;)
Once this library was in good shape, using it in Boxes was quite easy as
the existing code was modular enough. All I had to do was to add a new URI
type (ovirt://), and add a new Machine subclass to handle oVirt VMs, but
most of the work is done by the libgovirt library.
This work is not yet merged upstream but can be seen in my personal git
repository. After some small cleanups and a libgovirt release, it should be
in good shape for an upstream review and integration. As for libgovirt,
there is a lot of API to bind (help welcome!), but binding this new 3.1 API
will be mandatory to be able to connect to all oVirt-managed VMs. One
possible way forward for libgovirt would be to leverage the python oVirt
REST binding generator from ovirt-engine-sdk.
And before ending this blog post, mandatory screenshots! »
Cheers,
Christophe
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