How to upgrade Fedora version inside a toolbox container?

Hi :slight_smile:

After update of Fedora Workstation to version 33 I wanted to also update the toolbox container to version 33 (from 32). I tried running:

$ sudo dnf system-upgrade download --releasever=33
$ sudo dnf system-upgrade reboot

but the last command returned:

System has not been booted with systemd as init system (PID 1). Can't operate.

I guess this is because the container does not run systemd and is not booted in the same way as the host?

I managed to update the packages though by using:

$ sudo dnf system-upgrade upgrade --releasever=33

But the problem I have now is that the filesystem package didn’t get upgraded and sudo dnf upgrade filesystem always fails with:

Error: Transaction failed

Also the rpm operations are printing warnings:

warning: Found bdb Packages database while attempting sqlite backend: using bdb backend.

I tried to fix it with sudo rpmdb --rebuilddb but I get:

error: failed to replace old database with new database!
error: replace files in /var/lib/rpm with files from /var/lib/rpmrebuilddb.7504 to recover

I also can’t manually copy the files. I guess because this is part of the container image?

Otherwise everything seems to work OK, but it doesn’t look like a clean upgrade. What I want to ask is if there is a normal way to upgrade Fedora inside a container or maybe just swap the base image with a new one?
Or is the only option to create a new container with F33 as base and reinstall the packages from the old container?