Hi Everyone, I wanted to announce the addition of a new infra service we started running recently, the firehose. Running at firehose.openstack.org the firehose is an MQTT based unified message bus for infra services. The concept behind is it that there are a lot of infra services many of which emit events, however there wasn't a single place to go to for anything. If you have a script or tool which is listening for events from an infra service, or has a poll loop (like anything using gerritlib) there is now a single place to go for consuming those messages. We also have 2 interfaces to subscribe to topics on the firehose, either via the MQTT protocol on the default port or via a websockets over port 80. The websocket interface should enable easier consumption for people on networks with stricter firewalls.
Right now the only things sending messages into the firehose is the gerrit event stream (via germqtt) and launchpad bug events (via lpmqtt) but several other efforts are in progress to add additional services to the firehose. The plan is to expand what publishes events to include all the infra services. This way there is a single location for anything that needs to consume events. There is also an example on the consuming side with gerritbot, which now has support for subscribing to the gerrit event stream over MQTT. You can see the patch here: http://git.openstack.org/cgit/openstack-infra/gerritbot/commit/?id=7c6e57983d499b16b3fabb864cf3bd5cfea8ab63 For those interested the spec detailing all the pieces is here: http://specs.openstack.org/openstack-infra/infra-specs/specs/firehose.html and the docs are available here: http://docs.openstack.org/infra/system-config/firehose.html which contain details on how the services are setup and includes some basic steps and examples on how to start consuming events from the firehose. Thanks, Matt Treinish
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