Hi,
I would like to configure kernel in container with Ubuntu 14.04 (I want to check enabling multicast …) but I can’t find directory where is kernel configuration file. Do not you know where it might be?
Containers by definition share kernel with the host, so you can’t expose a different kernel to a particular container.
Specific features may be namespaced and configurable on a per-container basis, that’s the case with most networking flags which are accessible under /proc/sys/net within the container.