Public bug reported: With the latest Saucy, LXC containers don't seem to have their network setting configured correctly. I've tried this with both containers created before I upgraded to Saucy, and containers freshly created after the upgrade. In both cases, the guest user-space is 12.04.
After the container has started I try to find the address, but it fails: $ host precise 10.0.3.1 Using domain server: Name: 10.0.3.1 Address: 10.0.3.1#53 Aliases: Host precise not found: 2(SERVFAIL) Looking in the syslog reveals that it did try to obtain an address, and dnsmasq did try to serve one (I think). The following is repeated many times: Jul 23 12:07:27 GBN-ASTUBBS-UB dnsmasq-dhcp[1475]: DHCPDISCOVER(lxcbr0) 00:16:3e:9e:0f:ee Jul 23 12:07:27 GBN-ASTUBBS-UB dnsmasq-dhcp[1475]: DHCPOFFER(lxcbr0) 10.0.3.154 00:16:3e:9e:0f:ee But, still, nothing can get in, and nothing can get out. Inside the container, ifconfig gives this: eth0 Link encap:Ethernet HWaddr 00:16:3e:89:48:ab inet6 addr: fe80::216:3eff:fe89:48ab/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:192 errors:0 dropped:0 overruns:0 frame:0 TX packets:28 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:23650 (23.6 KB) TX bytes:6952 (6.9 KB) lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:65536 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B) If I try running "sudo dhclient" manually then I get many more entries in the log, but still no address. I can get the network interface to function by configuring it manually: ifconfig eth0 10.0.3.50/24 route add default gw 10.0.3.1 echo 'nameserver 10.0.3.1' > /run/resolvconf/interface/eth0 service resolvconf restart I'm sure that the official way to set up a static IP would work too, but really I want DHCP to work, like it used to. ** Affects: lxc (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to lxc in Ubuntu. https://bugs.launchpad.net/bugs/1204069 Title: lxc dhcp fails To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/1204069/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs