Dbus change of location from system_bus_socket

[Lennart Poettering]

On Mi, 23.05.18 06:35, Mark Hieber (hieberm at gmail.com) wrote:

> I am running Centos 7 in a virtual machine. We use systemctl and
> hostnamectl, so dbus is included when we build our image as a dependency of
> systemd.
> 
> In the past, we used dbus version 1.6.12 and systemd version 219. Now when
> I build my image I am using dbus v 1.10.24 and systemd v 219. However, this
> seems to have introduced a breaking change, as system_bus_socket is now
> installed in /run/dbus instead of in /var/run/dbus. This means that
> commands like hostnamectl and certain systems in systemctl cannot run,
> since they do not find the dbus socket.
> 
> My question is why was the system_bus_socket created where it was? Is this
> a change of behavior?
> 
> In order to make things work, I created a symlink from /run/dbus to
> /var/run/dbus. Is this the recommended approach to solve this issue?

On systemd systems /var/run *must* be a symlink to /run, thus making
both directories synonymous. This is explicitly documented, and if you
don't have such a symlink in place you will encounter breakage all
over the place.

Lennart

-- 
Lennart Poettering, Red Hat