LXC Web Panel : GUI for Linux Container

about LXC Web Panel

http://lxc-webpanel.github.io/index.html

[ install on Ubuntu 13.04 LXC ]

To install LXC Web Panel, we need to meet the following requirements.

Ubuntu 12.04 or higher LXC 0.8 or higher /var/lib/lxc as LXC root path

Here is my ubuntu box information.

root@ubuntu:~# tail -1 /etc/lsb-release DISTRIB_DESCRIPTION="Ubuntu 13.04" root@ubuntu:~# lxc-version lxc version: 0.9.0 root@ubuntu:~# ls /var/lib/lxc/ ubuntu-cn1  ubuntu-cn2 root@ubuntu:~#

installation is very easy. jsut issue “wget ..”

root@ubuntu:~# wget http://lxc-webpanel.github.io/tools/install.sh -O - | bash Installation complete! Adding /etc/init.d/lwp... Done Starting server...done. Connect you on http://your-ip-address:5000/ root@ubuntu:~# root@ubuntu:~# lsof -ni:5000 COMMAND   PID USER   FD   TYPE  DEVICE SIZE/OFF NODE NAME python  11771 root    3u  IPv4 1869384      0t0  TCP *:5000 (LISTEN) root@ubuntu:~# ps aux | grep 11771 | grep -v grep root     11771  0.3  0.2  70008 18064 ?        S    02:31   0:02 /usr/bin/python /srv/lwp/lwp.py

config file

I have used a default configuration file.

root@ubuntu:~# cat /srv/lwp/lwp.conf [global] address = 0.0.0.0 port = 5000 debug = False [database] file = lwp.db [session] time = 10 [overview] partition = /

how to start/stop

root@ubuntu:~# /etc/init.d/lwp status Usage: /etc/init.d/lwp {start|stop|restart} root@ubuntu:~# /etc/init.d/lwp stop Stopping server...Stopped process in pidfile '/var/run/lwp.pid' (pid 11771). done. root@ubuntu:~# /etc/init.d/lwp start Starting server...done.

access to web panel with an web browser

user : admin, pass : admin

You can create/start/stop/reboot containers via HTTP

Ubuntu LXC : use bridge network

small tips.

# lxc-version lxc version: 0.9.0 # tail -1 /etc/lsb-release DISTRIB_DESCRIPTION="Ubuntu 13.04" # uname -ri 3.8.0-25-generic x86_64

make a bridge network and associate that bridge (br0) with a physical link(eth0).

physical link : eth0

bridge network I made : br0

auto eth0 iface eth0 inet manual auto br0 iface br0 inet static        address 192.168.100.15        netmask 255.255.255.0        network 192.168.100.0        gateway 192.168.100.254        bridge_ports eth0        bridge_stp off        bridge_fd 0        bridge_maxwait 0

restart network

# /etc/init.d/networking restart

edit existing containers configuration(/var/lib/lxc/< container name>/config ) to have those containers use the bridge network br0 which is associated with eth0.

container name : ubuntu-cn1

# less /var/lib/lxc/ubuntu-cn1/config # Template used to create this container: ubuntu # Template script checksum (SHA-1): 6f468a9a658112f6420fb39d2ab90a80fd43cd22 lxc.network.type = veth lxc.network.hwaddr = MAC address #lxc.network.link = lxcbr0 lxc.network.link = br0

edit LXC’s config ( default.conf ) to have containers which I build next time use bridge network.

# less /etc/lxc/default.conf lxc.network.type = veth #lxc.network.link = lxcbr0 lxc.network.link = br0 lxc.network.flags = up

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