On Mon, Nov 7, 2016 at 4:13 AM, Jan Kurik <jkurik@xxxxxxxxxx> wrote: > = Proposed Self Contained Change: Module Build Service = > https://fedoraproject.org/wiki/Changes/ModuleBuildService > > Change owner(s): > * Ralph Bean <rbean@xxxxxxxxxx> > > > We will deploy an instance of the Module Build Service to production > in Fedora Infrastructure. Other teams will use this service to produce > some "modular" content for the Fedora 26 release. > > > == Detailed Description == > We will deploy an instance of the Module Build Service (MBS) to > production in Fedora Infrastructure. Other teams will use this service > to produce some "modular" content for the Fedora 26 release. > > In short, the MBS is a workflow orchestration service on top of koji. > When a user submits a request for a new module build: > > * A new tag is created in koji for that module build. > * A module-build macros package is synthesized and built in the new buildroot. > * The buildroot is linked with other module tags that it has declared > dependencies on. > * RPMs to be included in the module are rebuilt from source in the new tag. Can you explain this in more detail? How do layered modules work here? Is that what you mean by "buildroot is linked with other module tags"? Can modules built via MBS span releases, or are you strictly limiting it to the f26 repos for base packages? (E.g. can a module declare a dependency on an older package found in f25 and have it rebuilt into the module repo?) If all packages in a module are rebuilt from source, and we have a variety of modules that all include the packages, doesn't this increase the storage requirements over what we have today significantly? Are modules built on all architectures? (The answer should be yes, otherwise we will face significant boot strapping issues.) > * Kojira generates a yum/dnf repo from the new tag. > > The compose tooling (pungi) will then pick up this tag and possibly > include it in variants for the compose. > > For the Fedora 26 timeframe, we will lock down the users who can > submit to the MBS to a small number of Modularity WG members. This is > not ideal, but the thought is that we want to limit the amount of spam > that the MBS will impose on the production koji instance - we don't > want to interfere with the general release of Fedora 26. > > In the Fedora 27 timeframe, we will open it up to all packagers after > we're sure MBS is sophisticated enough to throttle itself > appropriately. Throttle? > == Scope == > * Proposal owners: We are responsible for the development, deployment, > and maintenance of the Module Build Service itself. We have a > prototype already functioning. At the time of writing, we still need > to harden it for production, and have it vetted for deployment by > Release Engineering and Fedora Infrastructure. > > * Other developers: We don't think that other developers will have to > make changes in response to this effort. The Base Runtime team (a > sub-team of the Modularity Working Group) will be working to prepare > content to be built in the Module Build Service. > > * Release engineering: In order to make use of the Module Build > Service, we will need changes to pungi to pull rpms for a variant from > the koji tags created by the Module Build Service, but that is a > separate Change proposal > [https://fedoraproject.org/wiki/Changes/ModularCompose]. The owners of > this proposal intend to do that work ourselves in consultation with > Release Engineering. Is this being done in staging to start with? > > * List of deliverables: N/A (not a System Wide Change) > > * Policies and guidelines: Note that we do not think there are any > packaging guidelines that will need to be changed in the Fedora 26 > timeline. We would like to change the branching structure in pkgdb and > dist-git in the Fedora 27 release cycle (with a separate Change > document). We furthermore will need to submit new Module Guidelines > that describe best practices and requirements for writing and > maintaining modulemd definitions - similar to how the Packaging > Guidelines describe best practices and requirements for writing and > maintaining .spec files. We would like to avoid writing those Module > Guidelines for the F26 cycle and instead limit the number of trusted > module maintainers to a small subset of the Modularity Working Group. > Once they have experience building the base modules, we'll use that > experience to inform the docs we write for F27, at which time we'll > open up the Module Build Service to the rest of the community. I think f27 is an aggressive target, but it's possible. The documentation and policies are key here, and those need to be done well in advance of general availability. josh _______________________________________________ devel mailing list -- devel@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to devel-leave@xxxxxxxxxxxxxxxxxxxxxxx
