Hello, thanks for filing this bug in Ubuntu.
I just tried a release upgrade from Cosmic to Disco.
Beforehand, I installed "postgresql" and its dependencies on Cosmic. I
got the server postgresql-10 at version 10.7.
Cluster was online:
root@cosmic-pgsql10:~# pg_lsclusters
Ver Cluster Port Status Owner Data directory Log file
10 main 5432 online postgres /var/lib/postgresql/10/main
/var/log/postgresql/postgresql-10-main.log
I then issued a do-release-upgrade.
During the upgrade, I got a warning that postgresql 10 is an "obsolete
major version", and it told me postgresql 11 was going to be installed,
and how I could migrate from to the other. I just acknowledged it, and
the upgrade continued.
In the end, the process told me some packages were going to be removed.
I opted to see a list, and there were no postgresql packages in there,
so I gave it an OK to continue.
The upgrade finished, and before rebooting, I got a postgresql package list to
see what was installed:
root@cosmic-pgsql10:~# dpkg -l|grep postgresql
ii postgresql 11+199 all
object-relational SQL database (supported version)
ii postgresql-10 10.7-0ubuntu0.18.10.1 amd64
object-relational SQL database, version 10 server
ii postgresql-11 11.2-1 amd64
object-relational SQL database, version 11 server
ii postgresql-client-10 10.7-0ubuntu0.18.10.1 amd64
front-end programs for PostgreSQL 10
ii postgresql-client-11 11.2-1 amd64
front-end programs for PostgreSQL 11
ii postgresql-client-common 199 all
manager for multiple PostgreSQL client versions
ii postgresql-common 199 all
PostgreSQL database-cluster manager
As can be seen, I have both postgresql 10 and 11 co-installed, and both
clusters are running:
root@cosmic-pgsql10:~# pg_lsclusters
Ver Cluster Port Status Owner Data directory Log file
10 main 5432 online postgres /var/lib/postgresql/10/main
/var/log/postgresql/postgresql-10-main.log
11 main 5433 online postgres /var/lib/postgresql/11/main
/var/log/postgresql/postgresql-11-main.log
Could you please elaborate on how you performed your testing, which packages
you had installed before and after, and also please attach the upgrade logs
from /var/log/dist-upgrade?
I'll mark the bug as incomplete for now. Please feel free to switch it
back to "new" after you provide the requested information.
** Changed in: postgresql-11 (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1825501
Title:
Upgrading the distro PURGED the previous postgresql-10 package
deleting the database data!
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