Mail service move (was: Physical movement of machines preparation)

['Sandro Santilli']

On Mon, Sep 15, 2025 at 05:10:39PM -0400, Regina Obe wrote:
> 
> We are changing the ip to what is currently in the network forward in
> osgeo9 but keeping the host name.

Then, when ready, we should re-point all these A records:

  - lists.osgeo.org
  - mail.osgeo.org
  - (*.)tilecache.osgeo.org [ shall we move this ? ]
  - drone.osgeo.org [ shall we drop this ? ]

And update the SPF records to include the new IP (this could be already done now).

> > I actually wonder what "containerize" really meant
> >
> Lxd-migrate is part of lxd source code https://github.com/canonical/lxd/tree/main/lxd-migrate

What I meant was: are we supposed to have an exact copy of all data ?

I think the answer is YES, but from the time lxd-migrate was run the
data on the machines started diverging. How are we going to deal with that ?

I understood there's an rsync script but that script does NOT copy ALL
the data, just a number of selected subdirectories, and the script itself
is run from within the new machine, making it impossible to copy (say)
the /etc/cron* directories w/out removing the script.

> > If we cannot account for DNS timing, how do we deal with mail queues ?
> 
> We don't.  But as I recall I think mail servers are set to retry for like 72 hours by default if they get a bounce.
> So I don't see this as being an issue except for making sure osgeo6 queue is clear before we switch over.

We'll need to make sure mail directed at the old IP get a bounce,
to get the retry (hoping the retry will be to the new IP).

As per OUR queues, at the time of writing mail.osgeo.org has 2114 queued messages.
We need to plan how to clear that queue.


--strk; 

  Libre GIS consultant/developer 🎺
  https://strk.kbt.io/services.html
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