upcoming build and release developer flag day December 12 2016

[Dennis Gilmore]

Hi All,

We are wanting to write to you all about an important date coming up. On the 
12th of December 2016 we will be making some important changes that will 
require changes on every developers machine. In this case developers means 
every one that interacts with koji using authentication

lookaside cache checksum hash. currently packages are stored in lookaside 
cache using md5sum we will be switching to sha256sum. The support for this has 
been in fedpkg for awhile, we have not switched the default as once we do any 
source uploaded with sha256sum will only be able to be verified by a client 
that supports sha256sum.

koji authentication will be switching to Kerberos. Koji supports multiple 
authentication mechanisms. Fedora infrastructure has set up a freeipa instance 
internally that has credential syncing to fas. We are working on ensuring that 
gssapi caching is supported so that you can have multiple TGT's and the 
ability to work in multiple reams at once. you can get started today by doing 
kinit <fas username>@FEDORAPROJECT.ORG if you move your ~/.fedora.cert file 
out of the way authentication will still work.

Using well known certs for koji.fedoraproject.org arm.koji.fedoraproject.org 
ppc.koji.fedoraproject.org s390.koji.fedoraproject.org pkgs.fedoraproject.org 
this is the last step needed to have fedoraproject.org switch to hsts and 
default to https:// when connecting to any fedora service. It will also remove 
a lot of questions that new people have when connecting to koji via https.

Disable ssl cert authentication in koji. With the switch to keberos and the 
change of ssl certificates on the koji and pkgs servers we will be disabling 
the ability to login to koji using a ssl certificate completely. This change 
will require new koji client configurations for everyone.

Gate rawhide builds. Gating will enable us to sign rawhide builds and switch 
the rawhide repo to having gpgcheck enabled.

In order to achieve everything we have to break end user configurations. All 
users will need to have new enough versions of fedora-packager, fedpkg, rpkg, 
koji. the exact versions needed are not yet known as some enhancements are 
still being worked on.  We will be aiming to have everything pushed stable 
right before the flag day. Some of the changes will not be compatible with the 
existing setup.  We anticipate keeping everyone informed as we move forward 
about any actions that will need to be taken on the developer side.  there is 
a wiki page at https://fedoraproject.org/wiki/ReleaseEngineering/FlagDay2016 
that will be updated as more is known.

Not in scope at this point is using kerberos for ssh or other apps supported 
by infrastructure, though it is not ruled out going forward.

If you have any questions please respond here or in #fedora-releng on freenode

Thanks

Release Engineering and Infrastructure