Hosting WordPress Site in LXC
LXC (LinuX Containers) is an operating system–level virtualization method for running multiple isolated Linux systems (containers) on a single control host. In this blog, we will explain, how to host a WordPress site in LXC & migrate it to another server
Installing LXC
To downloads the package lists from the repositories and “updates” them to get information on the newest versions of packages and their dependencies,
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apt-get update
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To install LXC ,
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apt-get install lxc -y
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To create a container name application,
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lxc-create -n application -t ubuntu
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-n : Name of Container
-t : LXC template. In our case, we’re using ubuntu template
It will take a while to create a container, once it has been created, it will give you username and password to login into your container.
To list running status of containers,
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lxc-ls –fancy
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root@ip-172-31-34-48:~# lxc-ls –fancy
NAME STATE IPV4 IPV6 AUTOSTART
——————————————-
application STOPPED – – NO
root@ip-172-31-34-48:~#
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To start a container,
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lxc-start -n application -d
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It will give you a login prompt, login with the user credentials that you’ve got above.
Installing WordPress Site
Install all the necessary packages,
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apt-get install mysql-server php5-mysql nginx php5-fpm php5-gd libssh2-php -y
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Create a Database,
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mysql -u root -p
CREATE DATABASE wordpress;
CREATE USER user@localhost IDENTIFIED BY ‘user123’;
GRANT ALL PRIVILEGES ON wordpress.* TO user@localhost;
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Download and untar wordpress
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cd /tmp/
wget http://wordpress.org/latest.tar.gz
tar xzvf latest.tar.gz
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Configure wordpress
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cd /tmp/wordpress
mv wp-config-sample.php wp-config.php
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Make below changes in wp-config.php
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// ** MySQL settings – You can get this info from your web host ** //
/** The name of the database for WordPress */
define(‘DB_NAME’, ‘wordpress’);
/** MySQL database username */
define(‘DB_USER’, ‘user’);
/** MySQL database password */
define(‘DB_PASSWORD’, ‘user123’);
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copy files to document root
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sudo rsync -avP /tmp/wordpress/ /usr/share/nginx/html
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Add an iptables rule to the prerouting table of host machine, to forward packets on port 80 to our nginx container’s port 80.
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iptables -t nat -A PREROUTING -i eth0 -p tcp –dport 80 -j DNAT –to 10.0.3.245:80
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Now you can access your site, by
http://your-public-ipaddress ( host machine )
Migrating Your lxc container to another host
Install LXC on destination host and stop LXC on your source host
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rsync -va /var/lib/lxc/container-name destination-host-ip:/var/lib/lxc/
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start container on your destination host.
Once you’re done with your containers, you can stop it
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lxc-stop -n application
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or if you want to terminate your container, you can destroy it
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lxc-destroy -n application
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Thanks,
Nikhil Kumar Sharma
