[Koha] Upgrade OS - Ubuntu 18.04 to 20.04

[Alvaro Cornejo]

Hi Isabel,

We also use a VPS provider (Linode) for the koha hosting.

What we do when migrating to a major version is to create a new VPS,
install everything from scratch, move the DB from the old system to the new
one, do the DB conversion and test that everything goes as expected.

As is a second VPS, we can take all the time needed to testng all the
features we use. Once we are happy with results, we do a new DB migration
since the installation/test process can take a couple of weeks; by then,
the DB has certainly changed since.

Linode allows us to swap public IP addresses from one VPS to another. So
putting the new VPS in service is quite easy (basically adjust some
addresses) and does not require changes in DNS.

Once the migration is done we keep the old system for a couple of weeks
just in case and then remove the old VPS.

This way allows us to work with low pressure, during normal working hours,
and to have almost zero downtime.

Hope this helps,

Regards,

Alvaro




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Le ven. 25 juin 2021 à 15:52, Isabel Pineda <isabel.pineda at ds.edu.sv> a
écrit :

> Hi.
>
> One of these days I will have to upgrade the OS. Currently I am running
> Koha on a VPS with Ubuntu 18.04.
> I would like to ask the community for your experience: Is it advisable to
> upgrade the OS on the existing server (following the instructions here:
> https://ubuntu.com/blog/how-to-upgrade-from-ubuntu-18-04-lts-to-20-04-lts-today)?
> Or will there be problems with the Koha installation? Maybe it is better to
> install Koha on a new server with a new OS version and then migrate the
> database from the old server to the new one? Apart from Koha (and the
> software required by Koha) there are only a few more programs installed on
> the server (Certbot, Postfix, vsftpd and the firewall).
>
> Can you tell me how you did it and if you were facing any difficulties?
>
> Thank you very much
> Isabel Pineda
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