[lxc-devel] lxc_veth_create() fails

[Daniel Lezcano]

On 03/10/2011 10:45 PM, richard -rw- weinberger wrote:
> hi!
>
> i'm trying to use lxc 0.7.4 on centos 5.5 (kernel 2.6.37.3).
>
> lxc-start fails when i configure a network.
> e.g:
> lxc-start: failed to create vethivvZMG-vethGjB0lG : Operation not supported
> lxc-start: failed to create netdev
> lxc-start: failed to create the network
> lxc-start: failed to spawn 'c0'
> lxc-start: No such file or directory - failed to remove cgroup '/cgroup/c0'
>
> it fails within lxc_veth_create():
> err = netlink_transaction(&nlh, nlmsg, answer);
> err becomes -95.
>
> within netlink_transaction() this condition leads to the error.
> answer->nlmsghdr.nlmsg_type == NLMSG_ERROR
>
> this is my configuration:
> lxc.utsname = c0
> lxc.network.type = veth
> lxc.network.flags = up
> lxc.network.link = bridge0
> lxc.network.hwaddr = a1:b2:c3:d4:e5:f6
> lxc.network.ipv4 = 10.0.2.41/24
> lxc.network.name = eth0
> lxc.mount = /lxc/_cfg/c0/fstab
> lxc.rootfs = /lxc/c0/
>
>
> any ideas why it fails?
> without a network configuration it works fine...

Is it possible the veth's kernel module is not loaded and module 
auto-load is disabled ?