On 6/10/25 13:14, Adrian Klaver wrote:
On 6/10/25 13:01, Jim Cunning wrote:
I had a Ubuntu 20.04 LTS system with a postgresql version 10 database,
and the system became unbootable. The database was stored in
/var/lib/postgresql/10/main and I was able to recover the entire
contents of the data in that directory and below. I now have a system
running ubuntu 24.04 LTS with postgresql version 16.
I obviously no longer have a running version 10 server, so I cannot
use pg_dump to retrieve the data. I have placed the recovered version
files in /var/lib/postgresql/10/main on my new system, alongside the
/var/lib/postgresql/16/main that was created when I installed
postgresql. I have tried several iterations of the pg_upgradecluster
command, a Python script provided by Ubuntu, but it says it cannot
find the database files.
I also see from the postgresql wiki pages that there is a pg_upgrade
utility program, but cannot find in any of the Ubuntu-provided
installation files. Can anyone provide some guidance on how I might
proceed?
1) Do:
man pg_upgradecluster
2) Assuming you used the PGDG repos to install Postgres you can do:
sudo apt install postgresql-10
to get a Postgres 10 install. I would move the
/var/lib/postgresql/10/main you created out of the way and then move the
contents back in to the installed version.
Forgot to say, be sure and retain a copy of the original 10 $DATADIR
somewhere where you can fetch it should the above not work as planned.
Thanks in advance.
--
Adrian Klaver
adrian.klaver@xxxxxxxxxxx
