[Zope] How to upgrade Python in older Zope?

Tue Sep 11 12:55:03 EDT 2007

Paul,

Thank you for the quick reply! I'm aware of the risk, but it seemed the easiest way to circumvent a limitation. I guess it would be even easier to find Python 2.1.3 built with LFS enabled for Windows. :-)

The reason I'm reluctant to touch anything is that I use Zope for OpenFlow, and I depend on its requirements. Currently it's OpenFlow 0.7 IIRC, while the development stopped at 1.3 and the upgrade of that application is a pain I'm trying to avoid. Also, I'm looking for the easiest possible way out, because in a month or two the entire application will be replaced with another solution.

If there is no other way than take Zope through a few updates, then I'll give that a shot when I get some time to tinker with this.

Thanks again, keep the ideas coming!
Titel

----- Original Message ----
From: Paul Winkler <pw_lists at slinkp.com>
To: zope at zope.org
Sent: Tuesday, September 11, 2007 6:30:12 PM
Subject: Re: [Zope] How to upgrade Python in older Zope?

On Tue, Sep 11, 2007 at 07:36:18AM -0700, Tit-Liviu Leontin wrote:
> Folks,
> 
> 
> I desperately need support for large filesystem so the data.fs file can exceed 2 GB.
> 
> I can only make minimal changes to the existing set-up, which consists of Zope 2.5.1 (binary release, with Python 2.1.3) on Windows Server 2003 and NTFS.
> 
> >From what I've read, the issue is with the old Python not having LFS enabled, so I thought I'd just upgrade it to 2.2.3 which has LFS enabled.
> 
> The question is, how do I do that? Windows installer for Python doesn't know what to upgrade in the Zope install, so I'm thinking to copy the right files from the extracted Python 2.2.3 in Zope folders.

That sounds like a really bad idea. From the Zope 2.5.1 release notes:

  * Zope requires Python 2.1 (Python 2.2 is currently *not* supported)

You should NOT assume that warning was put there for no reason :-)

Also, there's not a whole lot of expertise in this community on
building for Windows; we seem to be a linux/unix-heavy crowd. You'd better
stick to the binary releases and not mess with them, unless you can
find a bona-fide expert to help you.  Anyone? :-)

Meanwhile you might try migrating a *copy* of your Data.fs to Zope
first to Zope 2.6.4 (still uses Python 2.1.x) and then to Zope 2.7.7
(uses Python 2.3.x).

FWIW I recall 2.5 to 2.6 being a painless upgrade.  I think 2.7 was a
little more involved. The most likely problem to watch out for is
security-related issues: your code might accidentally rely on a
security weakness that was subsequently tightened, so you get
permission denied at unexpected times until your code and/or
configuration is fixed.  Install and turn on VerboseSecurity, it's a
big help with things like that.

-- 

Paul Winkler
http://www.slinkp.com
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