[Koha-devel] Relocating koha.org services

[Clay Fouts]

Thanks for the feedback. Unfortunately, because of limitations imposed by
the DNS hosting service (zoneedit.com), I have no influence over the TTL
value. It's stuck at 7200 seconds.

The redirect for the wiki is a good idea and simple to implement, so I'll
add that to the process. However, it's not possible to do this with the Git
repo, AFAIK, so it would be fruitless to do so with the gitweb interface.

Cheers,
Clay


On Sat, Apr 10, 2010 at 2:08 PM, Dobrica Pavlinusic <dpavlin at rot13.org>wrote:

> On Fri, Apr 09, 2010 at 12:36:10PM -0700, Clay Fouts wrote:
> > Hi, all.
> >
> > With the shift of koha.org-related services from Metavore (LibLime's
> former
> > owner) to PTFS, we're going to be relocating a few of the services that
> > currently reside on Metavore assets. Most notably, wiki.koha.org and
> > git.koha.org are going to move to a new system. This will involve a bit
> of
> > semi-downtime for each due to DNS propagation.
> >
> > It's undesirable and unnecessary to lose read access to these services;
> I'll
> > copy the data to the new location, redefine the DNS entries, and
> convergence
> > can take its sweet time. However, in order to minimize data
> syncronization
> > issues, I'm requesting that no changes be made to either of them after
> > 2010-04-12 07:00 UTC. I'll complete the transfer sometime during the
> 24-hr
> > period after that. Once DNS convergence is complete (theoretically only
> two
> > hours, but waiting 12 will be safer), I'll shut down the old service
> > locations and it will be safe to resume changes. I'll send another
> > announcement when that window has passed.
>
> Just my $0.02:
>
> In the past I had to setup various failover systems, so I usually use very
> low ttl (2 sec or so) in DNS entries (wiki.koha.org and git.koha.org)
> before
> migration (it seems that current ttl is 7200 seconds, so at least two hours
> before migration) and after switch make mod_rewrite proxy rule on old
> server
> which would proxy all requests to new one (using IP adress for obvious
> reasons) until everthing in DNS expires.
>
> Another alternative might be to add wiki2 and git2 aliases to new IP
> adress and issue 302 Location redirects on old server until DNS expires.
>
> Hopefully, this might help transitions smoother in future.
>
> --
> Dobrica Pavlinusic               2share!2flame
> dpavlin at rot13.org
> Unix addict. Internet consultant.
> http://www.rot13.org/~dpavlin
>
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