Re: [libvirt] LXC: autostart feature does set all interfaces to state up.

On Wed, Jul 17, 2013 at 11:33:22PM +0200, Richard Weinberger wrote: > Am 12.07.2013 03:36, schrieb Gao feng: > >> On 07/11/2013 07:58 PM, Richard Weinberger wrote: >> >>> Am 11.07.2013 11:49, schrieb Daniel P. Berrange: >>> >>>> On Thu, Jul 11, 2013 at 11:44:48AM +0200, Richard Weinberger wrote: >>>> >>>>> Am 11.07.2013 11:42, schrieb Gao feng: >>>>> >>>>>> On 07/11/2013 03:18 PM, Richard Weinberger wrote: >>>>>> >>>>>>> This morning I've installed a wrapper around ip to show me the process tree upon ip link ... down is used. >>>>>>> The log showed this: >>>>>>> >>>>>>> 769 ? Ss 0:00 /usr/lib/systemd/systemd-udevd >>>>>>> 17759 ? S 0:00 \_ /usr/lib/systemd/systemd-udevd >>>>>>> 17764 ? S 0:00 \_ /usr/lib/systemd/systemd-udevd >>>>>>> 17772 ? S 0:00 \_ /usr/lib/systemd/systemd-udevd >>>>>>> 19477 ? S 0:00 | \_ /bin/bash /sbin/ifdown veth5 -o hotplug >>>>>>> 19910 ? S 0:00 | \_ /sbin/ip link set dev veth5 down >>>>>>> >>>>>>> Now I have to urge to use a "Kantholz". ;-) >>>>>>> >>>>>>> >>>>>> hmmm... >>>>>> >>>>>> it's systemd... I have no idea now... :( >>>>>> >>>>> TBH it is not systemd's fault. >>>>> OpenSUSE's /usr/lib/udev/rules.d/77-network.rules did not white list veth* devices. >>>>> Therefore systemd-udevd called ifup/down and other hotplug magic. >>>>> >>>> Ah ha, that's a nice issue :-) I assume you've filed a bug against opensuse >>>> to fix this ? Can you post a link to the bug here for the sake of archive >>>> records. >>>> >>> Sure: >>> https://bugzilla.novell.com/show_bug.cgi?id=829033 >>> >>> >> It's good news we know what causes veth device down. :) >> > How does Fedora deal with veth devices? > Well the udev script you mention above does not exist on Fedora and AFAIK there's no other udev script which runs 'ifconfig down' on NICs. > SUSE folks think that this is a more likely a libvirt issue and closed my bug report as invalid... > If you remove or modify the 77-network.rules file does it fix the problem. If so, then it is obviously not a libvirt issue. IMHO it is completely bogus for udev to be arbitrarily ifdown'ing any interface. Daniel