this post was submitted on 22 Oct 2023
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Trouble upgrading from centos 7 to almalinux, where to get affordable help upgrading/migrating? (alien.top)
submitted 1 year ago by borgqueenx@alien.top to c/main@selfhosted.forum
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I tried to use the elevation upgrade script from almalinux, however it fails. it ends with the screenshot i attached, emergency mode. and I was then required to roll back a snapshot. My current host was so kind to take a look as well, also try to upgrade it themselfs, but they couldn't achieve it either on a quick try (i saw them through vnc also doing a drive repair)

I want to upgrade to almalinux 9 (through 8 then as required), so where does one get affordable and truthworthy help for these things, for the not-so-techy people like myself?

https://preview.redd.it/s7otwnb8nsvb1.png?width=1059&format=png&auto=webp&s=254feec75f4b9634525a503521baeeb0c6ce6158

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[โ€“] wileyhracehorse@alien.top 1 points 1 year ago (1 children)

I know this is probably not the answer you're looking for, but at my work we never even do in-place upgrades from one version of rhel to the next. Always a fresh install on a new server, then migration of each service.

If that sounds painful, it could be a good opportunity to dabble in some configuration management (like Ansible) or at least thorough build docs of how to get a bare server into the state you want.

The steps would basically be:

  1. Fresh OS install on new server
  2. Install each application and get it running.
  3. One by one, stop the application, copy data (files and/or databases) from old server, start application, troubleshoot until it's happy
  4. Switch DNS to new server
  5. Decommission old server

It's a bit harder if it's a physical machine and you can't spin up a new one simultaneously. With that, you just have to make a backup to an external drive and schedule some downtime.

[โ€“] borgqueenx@alien.top 1 points 1 year ago

"Some" downtime. Probably multiple weeks ๐Ÿ˜