Upgrade PostgreSQL from 13 to 14 on Ubuntu 22.04

Howto guide for upgrading PostgreSQL from version 13 to 14 on Ubuntu, after its upgrade from version 21.10 to 22.04 (Jammy Jellyfish).

TL;DR

After upgrade Ubuntu from version 21.10 to 22.04:

$ sudo pg_dropcluster 14 main --stop
$ sudo pg_upgradecluster 13 main
$ sudo pg_dropcluster 13 main

Goal

This article is aimed at those like me who use Ubuntu and PostgreSQL to develop locally on their computer and after the last update to Ubuntu 22.04 they have two versions of PostgreSQL installed.

Upgrade PostgreSQL

During Ubuntu updgrade to 22.04 you receive this message “Configuring postgresql-common”:

Obsolete major version 13

The PostgreSQL version 13 is obsolete, but the server or client packages are still installed.

Please install the latest packages (postgresql-14 and postgresql-client-14) and upgrade the existing clusters with pg_upgradecluster (see manpage).

Please be aware that the installation of postgresql-14 will automatically create a default cluster 14/main.

If you want to upgrade the 13/main cluster, you need to remove the already existing 14 cluster (pg_dropcluster --stop 14 main, see manpage for details).

The old server and client packages are no longer supported.

After the existing clusters are upgraded, the postgresql-13 and postgresql-client-13 packages should be removed.

Please see /usr/share/doc/postgresql-common/README.Debian.gz for details.

Use dpkg -l | grep postgresql to check which versions of postgres are installed:

ii postgresql               14+238                all   …
ii postgresql-13            13.6-0ubuntu0.21.10.1 amd64 …
ii postgresql-14            14.2-1ubuntu1         amd64 …
ii postgresql-client        14+238                all   …
ii postgresql-client-13     13.6-0ubuntu0.21.10.1 amd64 …
ii postgresql-client-14     14.2-1ubuntu1         amd64 …
ii postgresql-client-common 238                   all   …
ii postgresql-common        238                   all   …

Run pg_lsclusters, your 13 and 14 main clusters should be “online”.

Ver Cluster Port Status Owner    Data directory              Log file
13  main    5432 online postgres /var/lib/postgresql/13/main …
14  main    5433 online postgres /var/lib/postgresql/14/main …

There already is a cluster “main” for 14 (since this is created by default on package installation). This is done so that a fresh installation works out of the box without the need to create a cluster first, but of course it clashes when you try to upgrade 13/main when 14/main also exists. The recommended procedure is to remove the 14 cluster with pg_dropcluster and then upgrade with pg_upgradecluster.

Stop the 14 cluster and drop it.

$ sudo pg_dropcluster 14 main --stop

Upgrade the 13 cluster to the latest version.

$ sudo pg_upgradecluster 13 main

Your 13 cluster should now be “down” and you can verifity running pg_lsclusters

Ver Cluster Port Status Owner    Data directory              Log file
13  main    5433 down   postgres /var/lib/postgresql/13/main …
14  main    5432 online postgres /var/lib/postgresql/14/main …

Check that the upgraded cluster works, then remove the 13 cluster.

$ sudo pg_dropcluster 13 main

After all your data check you can remove your old packages.

$ sudo apt purge \
postgresql-13 \
postgresql-client-13

Disclaimer

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