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Fedora: (another) proposal for extended support

By Rebecca Sobol
July 15, 2009

Fedora is a fast moving project. New releases are on a six month schedule and each release is supported for only 13 months. Every so often the topic of extending that support window is raised. LWN covered a lengthy thread on the fedora-devel mailing list last October. Now a new proposal from Jeroen van Meeuwen has cropped up on the mailing list.

Fedora's cutting edge desktop is attractive to many, even in corporate environments. For those corporations that run Red Hat Enterprise Linux (or a derivative thereof) on their servers, Fedora provides a more up-to-date, yet compatible, desktop. Many of these corporations are willing to update their desktops once a year so, on the face of it, the thirteen month support window seems like enough. One can run Fedora N for one year and have one month in which to chose to upgrade to Fedora N+1 or N+2 and remain supported. However, things happen. Every now and then you just can't upgrade during that one month window and that leaves you unsupported for as long as it takes to schedule that upgrade.

Having a slightly longer support window is attractive to many, so proposals keep cropping up, but it is hard to achieve in practice. Fedora Legacy was successful for a while, but eventually that project was abandoned. So one has to ask why another proposal would be successful now.

The Extended Life Cycle (ELC) wiki page lists some good reasons for the proposal, but is more vague on how it will be accomplished. The proposal targets Fedora 12 as the first ELC release and calls for an additional six months of security updates after EOS (End of Service), so F12 would receive security updates for a total of of nineteen months. This is about half of the time one would run a RHEL (or derivative) distribution, keeping the desktop much fresher. However the proposal also notes:

  • We do not guarantee binary compatibility with the versions of applications or libraries that were in the Fedora release before it became EOS [End of Support].
  • We do not guarantee a stable API or ABI to the applications and libraries that we provide security updates for.

Clearly those two points could create some problems. No one is suggesting that security fixes be backported, so some packages will break during those six months. If one of those packages happens to be Firefox or some other critical desktop component the whole ELC support falls apart. Of course different businesses will consider different applications to be "critical".

There are other practical issues such as mirror space, CVS commit access, bugzilla maintenance, and more, which are listed on the wiki.

Kevin Kofler notes on the mailing list:

We'd just need some minimal infrastructure effort, one person willing to do the pushes (like you're doing for the supported releases) and everything else would be "as is", if somebody wants something fixed, they'll have to push the fix, if nobody cares, it won't be fixed. It isn't supported after all. And no QA, if it breaks, you get to keep the pieces. Again, it's unsupported, that means what it means. I still think it's better than not getting any security fixes at all.

Kevin Fenzi adds:

I think it is worse. It causes people to have an expectation that something will get security updates, and when it doesn't happen and they get compromised, they will not be very happy.

According to the Fedora Objectives: "Fedora is not interested in having a slow rate of change, but rather to be innovative. We do not offer a long-term release cycle because it diverts attention away from innovation." Clearly any sort of ELC proposal goes against these stated objectives.

Jesse Keating takes a look at how this proposal differs from Fedora Legacy:

First off, I think this is different from Fedora Legacy, or has potential to. Legacy had a few very key fail points. 1) it was opt in. Users had to know about it and actively enable it. 2) it was completely done outside of the Fedora infrastructure. 3) Fedora's popularity was very hit and miss, the type of people that would best use a Legacy like service were too burned to give any Red Hat related offering a shot. 4) RHEL4 (and its clones) were new enough for most of the people that would use this service, and thus they went that way.

However he also notes (among other points) that there needs to be some clarification of what vulnerabilities will get security updates. Clearly a local denial of service is a far different beast than a remote privilege escalation. Updates need to be all or nothing. It can't be up to the developers to decide what applications are critical to all users.

Fedora infrastructure continues to evolve and it could possibly be made to work for this proposal without too many major changes. This proposal is less ambitious than its predecessors, which is a point in its favor. It is also clear that this topic will continue to come up periodically until some solution is achieved. Whether it is this proposal or not remains to be seen.

Comments (10 posted)

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Page editor: Rebecca Sobol
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