raf: > On Fri, Dec 23, 2022 at 06:20:08PM +0100, Gerben Wierda > <gerben.wie...@rna.nl> wrote: > > What is the best way to do this? Or is it too troublesome and should > > I just use postfix outside of docker, installing it with apt? I would > > rather like to have a single (docker) deployment model which would > > make it easier later to migrate once more. > > It's probably heretical, but I don't think Docker is > well-suited to Postfix. You would need to configure > Docker to map many UNIX domain sockets to allow > Postfix's own processes to communicate with each other > and with any milters and policy services. Docker seems > to be primarily aimed at things that communicate only > via TCP. But take that with a grain of salt. I am > barely a Docker novice. I don't doubt that Postfix > could be packaged up with Docker, and that would make > migration easier, but so would Ansible. I prefer apt > and automated security upgrades to immutable > infrastructure. In general, that's silly, but Docker > (and immutable infrastucture) makes more sense when you > need many equivalent transient VMs, not a single, > stable MX host. But of course, that's just my opinion.
+1 for the Ansible over Docker suggestion. Server migration was always a worry to me, given the landscape where hosters can become unreliable (being bought off, no longer allowing email hosting, etc.). Because of this I have a playbook for deployment and a documented migration plan. This allows me to migrate at any time. I keep it up-to-date and even practice migration every few years. What advantages does Docker provide over this?
