On Thu, Jun 27, 2024 at 10:45:09AM +0000, Gino Ferguson via Postfix-users wrote:
> I have two questions regarding multi instance management.
>
> 1. is there a way to batch migrate multi instances from serverA to
> serverB? We are planning to replace our servers and I'd spare as much
> manual work if possible.
If the servers are sufficiently alike, just clone the configuration
directories. Otherwise, create an equivalent set of instances via
"postmulti" and then integrate the desired per-instance settings.
If there are deferred queued messages in some of the instances, copy
those over into the corresponding queues, and run:
$ postmulti -i <instance> -x postsuper -s
> 2. is there an ad-hoc way to move mails between instances by their
> queue ids? The idea is to identify mails that are older than, say, 4
> hours and move them to a multi instance called bucket4 or something. I
> know I could do this with config modification, but that's permanent.
> I'm looking for some ad-hoc command to do it.
Assuming a shared filesystem for all, just "mv" them to the target
instance's "hold" queue directory, then run "postsuper -H <queueid>"
Be mindful of (defaults below):
hash_queue_depth = 1
hash_queue_names = deferred, defer
in case you're hashing the "hold" directory.
--
Viktor.
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