Re: [libvirt] getting notified of events
On Thu, Oct 01, 2009 at 06:29:25PM +0200, Dan Kenigsberg wrote:
I am trying to understand how to use the virEvent* API.
I've built latest libvirt (with "Fix emission of domain events messages"
commit) and run the domain-events example.
events-c gives me mostly silence. nothing is printed when a domain
changes state.
events-python is more bizarre: it prints a line on every event - except
for the first one, where "Updating Timeout 0 0
Poll sleep 1" is printed. Only when the second event occurs, does the
callback for the first event gets executed.
What am I missing?
I've just tested the current GIT repo with events, as follows and couldn't
reproduce the problem you describe.
- Open 3 terminals
- In first terminal run
./daemon/libvirtd
- In second terminal run
./examples/domain-events/event-test qemu:///session
- In third terminal use virsh to stop/start/etc a guest
$ virsh start demo
Domain demo started
$ virsh suspend demo
Domain demo suspended
$ virsh resume demo
Domain demo resumed
$ virsh destroy demo
Domain demo destroyed
- Now back in the second terminal, it showed
myDomainEventCallback1 EVENT: Domain demo(1) Started Booted
myDomainEventCallback2 EVENT: Domain demo(1) Started Booted
myDomainEventCallback1 EVENT: Domain demo(1) Suspended Paused
myDomainEventCallback2 EVENT: Domain demo(1) Suspended Paused
myDomainEventCallback1 EVENT: Domain demo(1) Resumed Unpaused
myDomainEventCallback2 EVENT: Domain demo(1) Resumed Unpaused
myDomainEventCallback1 EVENT: Domain demo(-1) Stopped Destroyed
myDomainEventCallback2 EVENT: Domain demo(-1) Stopped Destroyed
NB, having 2 lines printed for each event is *delibrate* in the demo
program since it registered 2 callbacks
I saw the same results for the python demo program too
Regards,
Daniel
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