[lxc-users] Adding /dev/ppp to container under lxd

[Matt Willsher]

Hi,

I'm trying to add /dev/ppp to a container so I can initiate a PPPoE connection from inside the container.

lxd is 0.27

I have the following configuration on the container, derived from https://github.com/lxc/lxd/blob/master/specs/configuration.md#type-unix-char

config:
  linux.kernel_modules: pppoe
  ppp:
    major: "108"
    minor: "0"
    mode: "0600"
    path: /dev/ppp
    type: unix-char

The device appears in the container:

crw------- 1 root root 108, 0 Jan 28 10:06 /dev/ppp

Access to /dev/ppp gets denied:

# cat /dev/ppp 
cat: /dev/ppp: Operation not permitted

# ifup pppoe0
Plugin rp-pppoe.so loaded.
Couldn't open the /dev/ppp device: Operation not permitted
modprobe: ERROR: ../libkmod/libkmod.c:556 kmod_search_moddep() could not open moddep file '/lib/modules/4.2.0-25-generic/modules.dep.bin'
Linux kernel does not support PPPoE -- are you running 2.4.x?
Failed to bring up pppoe0.

Is there some other configuration that needs to be set on the container at allow access to /dev/ppp? 

Thanks,
Matt