[lxc-users] Installing lxd doesn't create bridge lxdbr0?

[Dan Kegel]

Thanks - I had no idea there was more than one systemd unit in lxd.
On May 3, 2016 12:30 AM, "Fajar A. Nugraha" <list at fajar.net> wrote:

> On Sun, May 1, 2016 at 8:07 AM, Dan Kegel <dank at kegel.com> wrote:
> > On ubuntu 16.04, the commands
> >    sudo apt install lxd
> >    sudo apt purge lxd
> >    ip link list
> > show that lxd leaves behind bridge lxdbr0 after uninstall, tsk tsk.
> > A tidy user might well do
> >    sudo ip link del lxdbr0
> > to clean up after it.
> >
>
> A "clean" way would probably be
>
> systemctl stop lxd-bridge
> apt-get purge lxd
>
> > But alas!  If you do that, *future* installs of lxd break, i.e.
> >    sudo apt install lxd
> >    lxc launch ubuntu: demo
> > fails!
> >   lxc info --show-log demo shows
> >             lxc 20160430173001.967 ERROR    lxc_conf -
> > conf.c:instantiate_veth:2594 - failed to attach 'veth7ME5PJ' to the
> > bridge 'lxdbr0': Operation not permitted
> > As mentioned in tych0's post
> > https://github.com/tych0/tycho.ws/issues/1 that can mean the bridge is
> > missing.
> >
> > Sure enough, the command
> >   sudo ip link add name lxdbr0 type bridge
> > rescues lxd and lets containers start again.
>
> systemctl start lxd-bridge
>
> As a side note, if you stop the lxd-bridge service before you purge
> lxd, then it would automatically be started again the next time it's
> needed (e.g. when you run "lxc list" or something)
>
> >
> > Why does lxd leave that bridge around after apt purge lxd, and why
>
> Not sure.
>
> Probably the devs think something else might still be using lxd
> bridge? Or perhaps they think remove the service file is enough?
>
> > doesn't it create it again on a new install?
>
> Probably due to some systemd thinking "lxd-bridge" is (since the
> service file was unceremoniously removed) started when it actualy
> isn't.
>
> --
> Fajar
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