On 09/10/2014 03:18 PM, Gordon Sim wrote: > On 09/10/2014 09:58 AM, Flavio Percoco wrote: >> To clarify the doubts of what Zaqar is or it's not, let me quote what's >> written in the project's overview section: >> >> "Zaqar is a multi-tenant cloud messaging service for web developers. > > How are different tenants isolated from each other? Can different > tenants access the same queue? If so, what does Zaqar do to prevent one > tenant from negatively affecting the other? If not, how is communication > with other tenants achieved. > > Most messaging systems allow authorisation to be used to restrict what a > particular user can access and quotas to restrict their resource > consumption. What does Zaqar do differently?
Zaqar keeps queues/groups isolated in a per-tenant basis. As of now, there's still no way to make 2 tenants access the same group of messages. However, we've already discussed - we'll likely work on that during Kilo - a way to provide a more fine-grained access control on messages. >> >> The service features a fully RESTful API, which developers can use to >> send messages between various components of their SaaS and mobile >> applications, by using a variety of communication patterns. Underlying >> this API is an efficient messaging engine designed with scalability and >> security in mind. >> >> Other OpenStack components can integrate with Zaqar to surface events >> to end users and to communicate with guest agents that run in the >> "over-cloud" layer. > > I may be misunderstanding the last sentence, but I think *direct* > integration of other OpenStack services with Zaqar would be a bad idea. > > Wouldn't this be better done through olso.messaging's notifications in > some way? and/or through some standard protocol (and there's more than > one to choose from)? > > Communicating through a specific, fixed messaging system, with its own > unique protocol is actually a step backwards in my opinion, especially > for things that you want to keep as loosely coupled as possible. This is > exactly why various standard protocols emerged. > Yes and no. The answer is yes most of the time but there are use cases, like the ones mentioned here, that make zaqar a good tool for the job.  https://etherpad.openstack.org/p/zaqar-integrated-projects-use-cases -- @flaper87 Flavio Percoco _______________________________________________ OpenStack-dev mailing list OpenStackfirstname.lastname@example.org http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev