good day. i trying to make callback function for VIR_DOMAIN_EVENT_ID_LIFECYCLE, i have successfully registering callback, but it never called, i need to know when domain started, stopped or crashed, i have write following code static int domain_event_handler(virConnectPtr conn, virDomainPtr dom, int event, int detail, void * opaque) { switch(event) { } return 0; } ..... int callback = virConnectDomainEventRegisterAny(libvirt_connection, NULL, VIR_DOMAIN_EVENT_ID_LIFECYCLE, VIR_DOMAIN_EVENT_CALLBACK(domain_event_handler), NULL, NULL); if(callback == -1) { std::cout<<"Error: failed to register domain event handle callback\n"; return -1; } ..... but "domain_event_handler" is never called, what is wrong here ?

21.08.2013 09:32, Martin Kletzander пишет: > On Wed 21 Aug 2013 01:03:37 AM CEST, Alexandr wrote: >> >> good day. i trying to make callback function for >> VIR_DOMAIN_EVENT_ID_LIFECYCLE, i have successfully registering >> callback, but it never called, i need to know when domain >> started, stopped or crashed, i have write following code >> >> static int domain_event_handler(virConnectPtr conn, >> virDomainPtr dom, int event, int detail, void * opaque) { >> switch(event) { } return 0; } >> >> ..... int callback = >> virConnectDomainEventRegisterAny(libvirt_connection, NULL, >> VIR_DOMAIN_EVENT_ID_LIFECYCLE, >> VIR_DOMAIN_EVENT_CALLBACK(domain_event_handler), NULL, NULL); >> if(callback == -1) { std::cout<<"Error: failed to register >> domain event handle callback\n"; return -1; } ..... >> >> >> but "domain_event_handler" is never called, what is wrong here >> ? > Are you running an event loop? You can have a look at our > examples [1] and see what's being done there. Especially note > the virEventRunDefaultImpl() [2] there. > Martin > [1] > http://libvirt.org/git/?p=libvirt.git;a=blob;f=examples/domain-events/eve... > [2] > http://libvirt.org/git/?p=libvirt.git;a=blob;f=examples/domain-events/eve... > oh..., i missed it, thx for hint and sorry for stupid questions . _______________________________________________ libvirt-users mailing list libvirt-users(a)redhat.com https://www.redhat.com/mailman/listinfo/libvirt-users

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On Wed, Aug 21, 2013 at 12:36:06PM +0300, Alexandr wrote: > -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 > > 21.08.2013 09:46, Alexandr пишет: >> 21.08.2013 09:32, Martin Kletzander пишет: >>> On Wed 21 Aug 2013 01:03:37 AM CEST, Alexandr wrote: >>>> >>>> good day. i trying to make callback function for >>>> VIR_DOMAIN_EVENT_ID_LIFECYCLE, i have successfully >>>> registering callback, but it never called, i need to know >>>> when domain started, stopped or crashed, i have write >>>> following code >>>> >>>> static int domain_event_handler(virConnectPtr conn, >>>> virDomainPtr dom, int event, int detail, void * opaque) { >>>> switch(event) { } return 0; } >>>> >>>> ..... int callback = >>>> virConnectDomainEventRegisterAny(libvirt_connection, NULL, >>>> VIR_DOMAIN_EVENT_ID_LIFECYCLE, >>>> VIR_DOMAIN_EVENT_CALLBACK(domain_event_handler), NULL, >>>> NULL); if(callback == -1) { std::cout<<"Error: failed to >>>> register domain event handle callback\n"; return -1; } >>>> ..... >>>> >>>> >>>> but "domain_event_handler" is never called, what is wrong >>>> here ? >> >>> Are you running an event loop? You can have a look at our >>> examples [1] and see what's being done there. Especially >>> note the virEventRunDefaultImpl() [2] there. >> >>> Martin >> >>> [1] >>> http://libvirt.org/git/?p=libvirt.git;a=blob;f=examples/domain-events/eve... >> >>> >> >> >>>

>>> http://libvirt.org/git/?p=libvirt.git;a=blob;f=examples/domain-events/eve... >> >>> >> >> >>>

> > now it's working except for events from other connections, for > example i want to handle domain started by virt-manager, now i do > not have event when it's started, is exists any api to handle > this events, or i need to implement internal polling of domains > state in my application ? The events system reports all lifecycle events, regardless of which connection triggered them. If you're not seeing events from domains started by virt-manager then your almost certainly connecting to a different libvirt URI than virt-manager is using. Daniel

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21.08.2013 12:58, Alexandr пишет: > 21.08.2013 12:39, Daniel P. Berrange пишет: >> On Wed, Aug 21, 2013 at 12:36:06PM +0300, Alexandr wrote: >>> -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 >>> >>> 21.08.2013 09:46, Alexandr пишет: >>>> 21.08.2013 09:32, Martin Kletzander пишет: >>>>> On Wed 21 Aug 2013 01:03:37 AM CEST, Alexandr wrote: >>>>>> >>>>>> good day. i trying to make callback function for >>>>>> VIR_DOMAIN_EVENT_ID_LIFECYCLE, i have successfully >>>>>> registering callback, but it never called, i need to >>>>>> know when domain started, stopped or crashed, i have >>>>>> write following code >>>>>> >>>>>> static int domain_event_handler(virConnectPtr conn, >>>>>> virDomainPtr dom, int event, int detail, void * >>>>>> opaque) { switch(event) { } return 0; } >>>>>> >>>>>> ..... int callback = >>>>>> virConnectDomainEventRegisterAny(libvirt_connection, >>>>>> NULL, VIR_DOMAIN_EVENT_ID_LIFECYCLE, >>>>>> VIR_DOMAIN_EVENT_CALLBACK(domain_event_handler), NULL, >>>>>> NULL); if(callback == -1) { std::cout<<"Error: failed >>>>>> to register domain event handle callback\n"; return -1; >>>>>> } ..... >>>>>> >>>>>> >>>>>> but "domain_event_handler" is never called, what is >>>>>> wrong here ? >>>> >>>>> Are you running an event loop? You can have a look at >>>>> our examples [1] and see what's being done there. >>>>> Especially note the virEventRunDefaultImpl() [2] there. >>>> >>>>> Martin >>>> >>>>> [1] >>>>> http://libvirt.org/git/?p=libvirt.git;a=blob;f=examples/domain-events/eve... >>>> >>>>> >>>> >>>> >>>>> >>>>> >>>>> [2] >>>>> http://libvirt.org/git/?p=libvirt.git;a=blob;f=examples/domain-events/eve... >>>> >>>>> >>>> >>>> >>>>> >>>>> >>>>> oh..., i missed it, thx for hint and sorry for stupid questions . >>> >>> now it's working except for events from other connections, >>> for example i want to handle domain started by virt-manager, >>> now i do not have event when it's started, is exists any api >>> to handle this events, or i need to implement internal >>> polling of domains state in my application ? >> The events system reports all lifecycle events, regardless of >> which connection triggered them. >> If you're not seeing events from domains started by >> virt-manager then your almost certainly connecting to a >> different libvirt URI than virt-manager is using. >> Daniel > also looks like i do not receiving last event, i mean last event > what passed to callback is "eventcount - 1" > _______________________________________________ libvirt-users > mailing list libvirt-users(a)redhat.com > https://www.redhat.com/mailman/listinfo/libvirt-users after few days of trying i have not resolved problem, and have followinf situation: i receiving events from my connection sometimes (not all and not always), i do not receiving events from other connections (virt-manager) at all (i am sure that connection url are same for both connections), my code follows: static int domain_event_handler(virConnectPtr conn, virDomainPtr dom, int event, int detail, void * opaque) { std::cout<<"domain event handler called\n"; } void libvirt_eventloop_thr_func() { while(true) //TODO: stop somehow on exit { if(virEventRunDefaultImpl() < 0) { virErrorPtr err = virGetLastError(); fprintf(stderr, "Failed to run event loop: %s\n", err && err->message ? err->message : "Unknown error"); } } } .... virSetErrorFunc(NULL, libvirt_error_handler); libvirt_connection = virConnectOpen("qemu:///system"); if(libvirt_connection == NULL) { std::cout<<"failed to connect to qemu:///system\n"; return -1; } std::cout<<"connected to qemu:///system\n"; if (virEventRegisterDefaultImpl() < 0) { virErrorPtr err = virGetLastError(); fprintf(stderr, "Failed to register event implementation: %s\n", err && err->message ? err->message: "Unknown error"); return -1; } { int callback = virConnectDomainEventRegisterAny(libvirt_connection, NULL, VIR_DOMAIN_EVENT_ID_LIFECYCLE, VIR_DOMAIN_EVENT_CALLBACK(domain_event_handler), NULL, NULL); if(callback == -1) { std::cout<<"Error: failed to register domain event handle callback\n"; return -1; } } boost::thread(boost::bind(&libvirt_eventloop_thr_func)); .... am i doing something wrong here ? _______________________________________________ libvirt-users mailing list libvirt-users(a)redhat.com https://www.redhat.com/mailman/listinfo/libvirt-users

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