On Thu, Aug 21, 2014 at 09:37:57AM +0000, Duan, Li-Gong (Gary@HPServers-Core-OE-PSC) wrote: > Hi Folks, > > > For the "ceilometer alarm-threshold-create" cmd, what is the correct > format of the webhook URL for alarm action, if I want to trigger a > template in Heat to be executed once this alarm is notified? Are there any > example of invoking heat template?
Can you explain what you mean by "invoking heat template" in more detail please? The URL is expected to be the pre-signed signal URL provided by some heat resources, e.g the ScalingPolicy resources for AutoScaling. > ----------------------------- > > --alarm-action <Webhook URL> > > URL to invoke when state transitions to alarm. May be used > multiple times. Defaults to None. > > ---------------------------- > > I "google"ed for this, but most are related to Heat autoscaling and the > alarm is defined in Heat template directly. That is the primary use-case, if you want heat to spin up a new stack in response to an alarm, the best way to do that is probably via OS::Heat::AutoScalingGroup, which can scale out heat stacks, here's an example: https://github.com/openstack/heat-templates/blob/master/hot/autoscaling.yaml#L65 This will scale out the "lb_server.yaml" template each time ceilometer posts to the pre-signed URL provided by the OS::Heat::ScalingPolicy resource: https://github.com/openstack/heat-templates/blob/master/hot/autoscaling.yaml#L118 However if what you actually want is for ceilometer to spin up a stack by interacting with the heat API directly triggering the stack create, then I think currently that is not possible, even if you were to create a pre-signed stack create call for the heat-api-cfn. This is because ceilometer inserts a pre-determined request body, which will only work with the handle_signal methods of the resources which expect to handle alarm signals from ceilometer: https://github.com/openstack/heat/blob/master/heat/engine/resources/autoscaling.py#L1028 Steve _______________________________________________ Mailing list: http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack Post to : [email protected] Unsubscribe : http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
