[Pkg-libvirt-maintainers] Bug#981435: libvirt: stops on upgrade: internal error: Failed to load module 'libvirt_driver_qemu.so': libvirt.so.0: version `LIBVIRT_PRIVATE_6.9.0' not found (required by libvirt_driver_qemu.so)

[Paul Wise]

On Sun, 2021-01-31 at 15:34 +0100, Andrea Bolognani wrote:

> As I've never used unattended-upgrades myself, I'm not familiar with
> it. Is there any chance you could provide some quick tips on how to
> set up a reproducer environment? Specifically how to set up the same
> upgrade strategy you're using, and whether it's possible to manually
> trigger an unattended-upgrades run? That would help a lot!

You can probably also reproduce it without unattended-upgrades by just
upgrading libvirt-daemon itself using apt but with unattended-upgrades
the key is to enable the minimal steps option, but do this overall:

Install a Debian system that has the old libvirt using the Debian
wayback machine (snapshot.debian.org), install unattended-upgrades and
add something like the following in /etc/apt/apt.conf.d/99override-u-u.conf
and then run this command: systemctl start apt-daily{,-upgrade}.service

   APT::Periodic::Update-Package-Lists "always";
   APT::Periodic::Download-Upgradeable-Packages "always";
   APT::Periodic::AutocleanInterval "always";
   APT::Periodic::Unattended-Upgrade "always";
   Unattended-Upgrade::Origins-Pattern { "origin=Debian"; };
   Unattended-Upgrade::MinimalSteps "true";
   Unattended-Upgrade::Mail "root";
   Unattended-Upgrade::Remove-Unused-Dependencies "true";
   Unattended-Upgrade::Automatic-Reboot "false";
   // Temporary options for debugging
   //Unattended-Upgrade::Verbose "true";
   //Unattended-Upgrade::Debug "true";

> As for the issue itself, I think it's caused by some of the
> dependencies not being strict enough

I'm not sure but I think the issue is caused by the libvirt0 symbol
file generating incorrect dependencies for the private symbols,
probably it should be much more restrictive for those.

The missing symbols are pretty concerning, those look like broken ABI?

-- 
bye,
pabs

https://wiki.debian.org/PaulWise
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