Pierre-Yves Chibon

Rawhide, the, rolling, development version of Fedora has often been considered has too broken and too unstable. Sometime to the detriment of the development of stable releases as well. In a near future, this should no longer be happening as now every change made to every package landing in Fedora rawhide can be gated based on test results.

This talk will walk you through the processes and changes that Fedora landed to make of this idea a reality.

Rawhide is the development version of Fedora. It is the version from which stable Fedora releases branch from and thus every change made to it will trickle down to the next stable release. This also means that there are time in the development of Fedora where changes landing in rawhide can (and do!) have a detrimental effect on the next stable release.

With the rawhide package gating initiative, Fedora has gained mechanisms to test and gate packages based on the results of these tests.

In this talk we will go through the mechanisms built to allow this gating, how it works, how to debug if there are issues with it. We will also gladly receive feedback from Fedora contributors who have interacted with it.

Fedmsg, the federated message bus, is a distributed system allowing bits of a project's infrastructure to publish events. This lightweight framework provides a central place to watch the life of a project, and allows anyone to listen in and trigger actions when an event is received.

Initially built by the Fedora Infrastructure team to uniformise communication between its services, the Fedmsg framework has now been adopted by Debian and even outside the realm of Linux distributions to broadcast events. All those deployments are using the same framework, and the same tools, fostering the ever-needed interoperability and collaboration between free software and open data projects.

In this talk, we will present how fedmsg works, how it was deployed in the Fedora and Debian infrastructures, and some of the technical choices that were made during those deployments. We will also present the applications being developed around the bus, as well as some ideas for future ones.