Hi, you always can create a backup of your EC2 instance and do a rollback in case of any trouble after or during upgrade.
WBR, Andrey Tovstik > On 8 Jul 2021, at 04:42, Shawn Heisey <deb...@elyograg.org> wrote: > > I have a mail server in AWS that is currently running Ubuntu 18. Every time > I log in, I am reminded that I can upgrade to Ubuntu 20. > > On Ubuntu 18, postfix is version 3.3.0-1ubuntu0.3. On Ubuntu 20, postfix > would be upgraded to 3.4.10-1ubuntu1. Many other packages, probably > including the mysql server, would also be upgraded. > > Both postfix and dovecot use a postfixadmin database in mysql for users. I > have postfix using amavisd-new for spam/virus checks and dovecot-lda for > delivery. > > I've been a little bit terrified of doing an upgrade, because I do have a > couple of people using my mail server for real work email and I don't want to > disrupt them. > > I'm writing today to find out what are the likely pain points I might > encounter when doing this kind of major upgrade, and if there is any helpful > information that can help me get through those problems. I'm hoping that it > will go smoothly and everything just works. > > Here's the postconf -n output: > https://apaste.info/jdKV > > If I have been silly enough to include sensitive data from the config, I > would appreciate a heads up so I know what passwords to change. I did a > quick glance and didn't see anything. > > Thanks, > Shawn
