I have confirmed on both wily and xenial that the new network-manager does behave properly.
After updating network-manager and restarting it (or rebooting as the updater recommends), installing lxd which then pulls lxc as a dependency does work reliably. I've also confirmed that wired connectivity as well as wireless connectivity appears unaffected by this fix, my laptop has been running the xenial version ever since Mathieu uploaded it and it's been working perfectly. I'm marking this verification-done and given the importance of the fix, will immediately release it to wily-updates. ** Tags removed: verification-needed ** Tags added: verification-done -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to lxc in Ubuntu. https://bugs.launchpad.net/bugs/1512749 Title: lxcbr0 dissappears on Ubuntu 15.10 Status in lxc package in Ubuntu: Invalid Status in network-manager package in Ubuntu: Fix Released Status in lxc source package in Wily: Invalid Status in network-manager source package in Wily: Fix Released Status in lxc source package in Xenial: Invalid Status in network-manager source package in Xenial: Fix Released Bug description: === SRU === Rationale: Network Manager in wily triggers on newly created interfaces and resets their network configuration even though it's not supposed to manage them at all. This breaks LXC and quite possibly libvirt as those provide bridges which are then completely unconfigured by Network Manager. Test case: 1) Update (or not) network-manager 2) Restart it 3) Install lxc 4) Check that lxcbr0 exists and has an IP configured Regression potential: The change to Network Manager is related to udev handling of new devices, even though normal operation on a regular desktop machine was tested, it's not impossible that this may regress handling of some devices. The fix was cherry-picked directly from upstream, so did go through code review and has been publicly available for a while. This fixes a significant regression compared to Ubuntu 15.04 and looks less risky than the alternative workaround which was uploaded earlier. === Original report === After initial upgrade from Ubuntu 15.04 to Ubuntu 15.10 LXC worked for a couple days then failed. I found that the lxcbr0 interface no longer existed. I reported this on the lxc-user alias and about the same time several others had this happen to them also. Serge Hallyn requested I open a launchpad bug and post some info but before I could gather that info the system returned to normal (re lxcbr0 was back) the next day after the server was booted up again. note: at least one other person had this happen to them also (lxcbr0 came back by itself). Today, I booted this server again and ... again lxcbr0 was missing where it had been working last night. Below is all of the Info Serge Hallyn asked me to post. $ ifconfig lxcbr0 lxcbr0: error fetching interface information: Device not found $ journalctl -u lxc-net -- Logs begin at Tue 2015-11-03 07:25:22 EST, end at Tue 2015-11-03 10:02:08 EST Nov 03 07:25:48 server3 systemd[1]: Starting LXC network bridge setup... Nov 03 07:25:50 server3 lxc-net[913]: dnsmasq: failed to create listening socket Nov 03 07:25:50 server3 lxc-net[913]: Failed to setup lxc-net. Nov 03 07:25:50 server3 systemd[1]: Started LXC network bridge setup. root@server3:/home/bmullan# /usr/lib/x86_64-linux-gnu/lxc/lxc-net stop # note - execution just returns to command line root@server3:/home/bmullan# >> and lxcbr0 is still missing # ifconfig lxcbr0 lxcbr0: error fetching interface information: Device not found root@server3:/home/bmullan# /usr/lib/x86_64-linux-gnu/lxc/lxc-net start dnsmasq: failed to create listening socket for 10.0.3.1: Cannot assign requested address Failed to setup lxc-net. root@server3:/home/bmullan# $ uname -a Linux server3 4.2.0-16-generic #19-Ubuntu SMP Thu Oct 8 15:35:06 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux $ lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 15.10 Release: 15.10 Codename: wily To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/1512749/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
