unable to start lxc on ubuntu

[James Stewart Miller]

Hi,

I've installed lxc on lubuntu utopic with a 3.18.3 lowlatency kernel, and I can't get lxc to start. I'm getting the following errors in a logfile:

lxc-start 1421773029.483 ERROR lxc_conf - conf.c:instanciate_veth:2817 - failed to attach 'vethJCKW6M' to the bridge 'lxcbr0' : Operation not permitted
      lxc-start 1421773029.498 ERROR lxc_conf - conf.c:lxc_create_network:3100 - failed to create netdev
      lxc-start 1421773029.498 ERROR lxc_start - start.c:lxc_spawn:829 - failed to create the network
      lxc-start 1421773029.498 ERROR lxc_start - start.c:__lxc_start:1087 - failed to spawn 'my32bitbox'
      lxc-start 1421773034.504 ERROR lxc_start_ui - lxc_start.c:main:337 - The container failed to start.
      lxc-start 1421773034.504 ERROR lxc_start_ui - lxc_start.c:main:339 - To get more details, run the container in foreground mode.
      lxc-start 1421773034.504 ERROR lxc_start_ui - lxc_start.c:main:341 - Additional information can be obtained by setting the --logfile and --logpriority options.

I tried looking at some of the other bugs where this was reported, but it seems to be different in my case to theirs. Veth module is loading ok, and lxc-net service is started ok (according to initctl list). I have tried purging and reinstalling. I don't believe that I have bind9 running or installed. I am using a custom compile with low latency enabled.
uname -a = 3.18.3 #1 SMP PREEMPT Tue Jan 20 14:44:09 GMT 2015 x86_64 x86_64 x86_64 GNU/Linux

I have threadirqs enabled in the grub commandline. I am going to try with a generic low latency kernel.

Thanks

[James Stewart Miller (jamesstewartmiller)]

I've had no problems with the 3.16 low latency kernel. From what I can see I am not missing any required kernel config options, but can you recommend a good source to describe exactly which kernel options are required? Many thanks.

[Serge Hallyn (serge-hallyn)]

Where did you get the custom kernel?

How exactly are you starting the container? What do you see when you run

sudo lxc-checkconfig

? Please run 'lxc-start -n containername -l trace -o debug.out' and attach 'debug.out'.

[Launchpad Janitor (janitor)]

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[Launchpad Janitor (janitor)]

[Expired for linux (Ubuntu) because there has been no activity for 60 days.]