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
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install LXC via apt-get
# apt-get install lxc
# dpkg -l lxc
ii lxc 0.9.0-0ubunt amd64 Linux Containers userspace tools
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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
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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
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[ 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>
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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
#
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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
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make the directory.
# mkdir /var/lib/lxc/ubuntu-cn1
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try again. error.
# lxc-create -t ubuntu -n ubuntu-cn1
lxc-create: 'ubuntu-cn1' already exists
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remove the directory.
# rm /var/lib/lxc/ubuntu-cn1/ -r
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Seen from results of googling “lxc-create: failed to execute template” , someone faced the similar issue when LANG is not valid.
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
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change the LANG environment to en_US.UTF-8 from C
# export LANG=en_US.UTF-8
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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
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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
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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
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