On Sun, Apr 10, 2016 at 1:16 PM, Yaniv Kaul <ykaul@redhat.com> wrote:
On Sun, Apr 10, 2016 at 11:02 AM, Yedidyah Bar David <didi@redhat.com> wrote:
On Sun, Apr 10, 2016 at 10:43 AM, Barak Korren <bkorren@redhat.com> wrote:
Hi there, I use the following Python SDK snippet to create a template from an existing VM:
templ = ovirt.templates.add( ovirtsdk.xml.Template(vm=vm, name=vm.name) )
This seems to launch a template creation task in a non-blocking manner, which makes the next command I run, which tries to delete the VM, fail because the VM is still locked by the template creation task.
Is there a way to block on the template creation task and not return to the code until it finishes?
I don't think so, but you can loop waiting, see e.g.:
http://www.ovirt.org/develop/api/pythonapi/#create-a-template-from-vm
I wish we could have an extra parameters on the Python SDK that would do this exact loop for us, since essentially most use cases require this. I'm not sure it is relevant only for template creation, btw. What is also more annoying, is that this loop (IIRC) will never break, if something bad happens and the template ends up in a state != down (such as locked). (Same issue I've just had with host installation - Iv'e waited endlessly for it to be in 'up' state, only to find out it ended in 'installed_failed' state).
What we need is way to wait for events. For example, perform a request that never completes, sending events as json/xml fragments and chunked encoding. Here is an example: https://dev.twitter.com/streaming/overview Nir