Hi, Vitrage holds a topology graph with all resources in the system and the relationships between them, for fault correlation purposes[1]. It uses notifications from Nova (as well as from other components) to update its internal state[2].
It is important for us to get immediate notifications about state changes, so we can react fast. For example, if a new instance is created on a host with high CPU load, we will immediately raise an alarm on that instance that it may suffer from CPU performance degradation. I’ll be happy to discuss our use cases at the PTG. [1] https://wiki.openstack.org/wiki/Vitrage [2] https://github.com/openstack/vitrage/blob/master/vitrage/datasources/nova/instance/driver.py Best Regards, Ifat. On 30/08/2017, 17:30, "Balazs Gibizer" <balazs.gibi...@ericsson.com> wrote: Hi, Nova emits notifications for many different event, like different instance actions[1]. Also the nova developer community is working on making nova notifications well defined and easy to consume [2]. The goal of this mail is twofold. 1) We in the nova developer community would like to see which projects are using (or planning to use) the nova notification interface. Also we would like to know if you are using the legacy unversioned notifications or the new versioned ones. We would like to know what are your use cases towards our notification interface and we also would like to get any type of feedback about the interface (both the old and the new one). Based on this information we can make better decision where to focus our development effort. As a good example we already have a cooperation with the searchlight project to enhance nova's versioned notification interface based on their needs [3]. I opened an etherpad [4] to collect the projects and the feedback and we can go through that feedback in the PTG to define some actions. 2) Creating a well defined and easy to use notification interface gives us plenty of work in nova. So we are also looking for developers who can help us in this work. Big chunk of [2] is considered as low hanging fruit and I'm happy to mentor anybody who is interested learning this part of nova. If you want to join to this work just ping me (gibi) or IRC. Cheers, gibi [1]https://docs.openstack.org/nova/latest/reference/notifications.html [2]https://blueprints.launchpad.net/nova/+spec/versioned-notification-transformation-queens [3]https://blueprints.launchpad.net/nova/+spec/additional-notification-fields-for-searchlight [4]https://etherpad.openstack.org/p/queens-nova-notifications __________________________________________________________________________ OpenStack Development Mailing List (not for usage questions) Unsubscribe: openstack-dev-requ...@lists.openstack.org?subject:unsubscribe http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev __________________________________________________________________________ OpenStack Development Mailing List (not for usage questions) Unsubscribe: openstack-dev-requ...@lists.openstack.org?subject:unsubscribe http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
