Linux Containers

Some notes around building and managing Linux Containers.

Building LXC on Debian Wheezy

Get the latest from https://linuxcontainers.org/downloads/ and configure it:

$ ./configure --enable-doc --enable-capabilities --enable-bash

$ make

$ sudo make install

The installer will deploy libraries in /usr/local/lib. Make sure to have your LD_LIBRARY_PATH correctly set:

$ export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/lib

You can then verify the function enabled on your system using lxc-checkconfig:

$ sudo lxc-checkconfig
Kernel configuration not found at /proc/config.gz; searching...
Kernel configuration found at /boot/config-3.2.0-4-amd64
--- Namespaces ---
Namespaces: enabled
Utsname namespace: enabled
Ipc namespace: enabled
Pid namespace: enabled
User namespace: enabled
Network namespace: enabled
Multiple /dev/pts instances: enabled

--- Control groups ---
Cgroup: enabled
Cgroup clone_children flag: enabled
Cgroup device: enabled
Cgroup sched: enabled
Cgroup cpu account: enabled
Cgroup memory controller: enabled
Cgroup cpuset: enabled

--- Misc ---
Veth pair device: enabled
Macvlan: enabled
Vlan: enabled
File capabilities: enabled

Note : Before booting a new kernel, you can check its configuration
usage : CONFIG=/path/to/config /usr/local/bin/lxc-checkconfig