Linux container 0.9.0 on Ubuntu 13.04

Here’s how to use LXC ( Linux Container ) on Ubuntu 13.04

# tail -1 /etc/lsb-release DISTRIB_DESCRIPTION="Ubuntu 13.04" root@ubuntu-2:~# uname -ri 3.8.0-25-generic x86_64

install LXC via apt-get

# apt-get install lxc # dpkg -l lxc ii  lxc            0.9.0-0ubunt amd64        Linux Containers userspace tools

just referred to https://help.ubuntu.com/lts/serverguide/lxc.html

[ config file ]

I used default configuration files.

# ls /etc/init/lxc* /etc/init/lxc-instance.conf  /etc/init/lxc-net.conf  /etc/init/lxc.conf # ls /etc/default/lx* /etc/default/lxc

template files

# ls /usr/share/lxc/templates/ lxc-alpine     lxc-busybox  lxc-opensuse  lxc-ubuntu lxc-altlinux   lxc-debian   lxc-oracle    lxc-ubuntu-cloud lxc-archlinux  lxc-fedora   lxc-sshd

[ build a container by using template files ]

build a ubuntu container with lxc-ubuntu template.

# lxc-create -t ubuntu -n ubuntu-cn1 lxc-create: No config file specified, using the default config /etc/lxc/default.conf Checking cache download in /var/cache/lxc/raring/rootfs-amd64 ... <snip>

nn , error

<snip> Processing triggers for initramfs-tools ... Download complete Copy /var/cache/lxc/raring/rootfs-amd64 to /var/lib/lxc/ubuntu-cn1/rootfs ... Copying rootfs to /var/lib/lxc/ubuntu-cn1/rootfs ... lxc-create: failed to execute template 'ubuntu' lxc-create: aborted #

there is no /var/lib/lxc/ubuntu-cn1 direcoty..

# ls /var/lib/lxc/ubu* ls: cannot access /var/lib/lxc/ubu*: No such file or directory

make the directory.

# mkdir /var/lib/lxc/ubuntu-cn1

try again. error.

# lxc-create -t ubuntu -n ubuntu-cn1 lxc-create: 'ubuntu-cn1' already exists

remove the directory.

# rm /var/lib/lxc/ubuntu-cn1/ -r

Seen from results of googling “lxc-create: failed to execute template” , someone faced the similar issue when LANG is not valid.

https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/1166841

Seen from LANG environment in my box , I have specified C as LANG environment.

# echo $LANG C # cat /var/lib/locales/supported.d/local ja_JP.UTF-8 UTF-8 en_US.UTF-8 UTF-8

change the LANG environment to en_US.UTF-8 from C

# export LANG=en_US.UTF-8

try again. Okay.

# lxc-create -t ubuntu -n ubuntu-cn1 lxc-create: No config file specified, using the default config /etc/lxc/default.conf Checking cache download in /var/cache/lxc/raring/rootfs-amd64 ... Copy /var/cache/lxc/raring/rootfs-amd64 to /var/lib/lxc/ubuntu-cn1/rootfs ... Copying rootfs to /var/lib/lxc/ubuntu-cn1/rootfs ... Generating locales...  en_US.UTF-8... done Generation complete. ## # The default user is 'ubuntu' with password 'ubuntu'! # Use the 'sudo' command to run tasks as root in the container. ## 'ubuntu' template installed 'ubuntu-cn1' created

start the container.

# lxc-list WARNING: lxc-list is deprecated, please use lxc-ls --fancy.         This symlink will be dropped in LXC 1.0. NAME        STATE    IPV4  IPV6  AUTOSTART ------------------------------------------ ubuntu-cn1  STOPPED  -     -     NO # lxc-start -n ubuntu-cn1 <4>init: ureadahead main process (6) terminated with status 5 <4>init: udev-fallback-graphics main process (56) terminated with status 1 <4>init: console-font main process (80) terminated with status 1 <4>init: setvtrgb main process (92) terminated with status 1 <4>init: console-setup main process (97) terminated with status 1 <30>udevd[130]: starting version 175 <4>init: failsafe main process (147) killed by TERM signal Ubuntu 13.04 ubuntu-cn1 console ubuntu-cn1 login: root@ubuntu-cn1:~# tail -1 /etc/lsb-release DISTRIB_DESCRIPTION="Ubuntu 13.04" root@ubuntu-cn1:~# uname -ri 3.8.0-25-generic x86_64

The building time of the next container is very fast, because my box has already cached.

# time lxc-create -t ubuntu -n ubuntu-cn2 lxc-create: No config file specified, using the default config /etc/lxc/default.conf Checking cache download in /var/cache/lxc/raring/rootfs-amd64 ... Copy /var/cache/lxc/raring/rootfs-amd64 to /var/lib/lxc/ubuntu-cn2/rootfs ... Copying rootfs to /var/lib/lxc/ubuntu-cn2/rootfs ... Generating locales...  ja_JP.UTF-8... up-to-date Generation complete. ## # The default user is 'ubuntu' with password 'ubuntu'! # Use the 'sudo' command to run tasks as root in the container. ## 'ubuntu' template installed 'ubuntu-cn2' created real    0m5.033s user    0m3.144s sys     0m2.404s