WordPress and Etherpad with BlueMix and Docker

Our aim is to run on BlueMix containers (now in beta) these two famous services In the BlueMix dashboard, we click create a container, we then follow the steps, paste a SSH public key, and wait for the creation to be confirmed. Then, we connect to the container using the SSH private key (I used putty as a SSh client on windows). Once connected as root, we are ready to work with our container.

WordPress WordPress is a CMS (kind of blog manager) widely used and easy to configure. To run WordPress, we will need Apache, as a web server, MySQL for the database, and php will be the scripting language. Finally, we will install and run WordPress.

Apache Installation Our containers are based on ubuntu 14.04, we will be able to use its packet manager, called apt. The command is : apt-get update && apt-get install apache2 && service apache2 start

MySQL installation apt-get install mysql-server php5-mysql service mysql start mysql_install_db mysql_secure_installation The installation script will run, and questions will be asked through the terminal (which password, which user …?)

Php install (version 5 used) apt-get install php5 libapache2-mod-php5 php5-mycrypt php5-gd libssh2-php We then edit (for example with nano) /etc/apache2/mods- enabled/dir.conf We switch the order of index.html and index.php,

Creation of the database mysql –u root –p CREATE DATABASE wordpress; CREATE user IDENTIFIED BY ‘our_password’; GRANT ALL PRIVILEGES ON wordpress.* TO FLUSH PRIVILEGES; exit

Wordpress download cd ~ wget tar xzvf latest.tar.gz

Wordpress configuration cd./wordpress cp wp-onfig-sample.php wp-config.php nano wp-config.php define('DB_NAME', 'wordpress'); define('DB_USER', 'wordpress_user'); define('DB_PASSWORD', ‘our_password');

Linking apache and wordpress rsync -avP ~/wordpress/ /var/www/html/

First launch We access (or the address given by bluemix)

Etherpad Etherpad is a collaborative tool used to edit text, very similar to a Google Doc We will use etherpad lite, that works with nodejs, and NginX will take care of the network.

Installation of node.js Etherpad requires a given version of node.js (between 0.10 and 0.12). I then chose to download it directly from the node.js website. Wget Tar xzvf node-v tar.gz./configure Make #This is the compilation step, it may take time Make install Node –v checks the version of node installed (0.12 for me).

etherpad lite installation Mkdir etherpad_folder Cd etherpad_folder git clone If dependencies are not up-to-date, there are errors : we must update. We can edit the address: ~/etherpad_folder/etherpad- lite/settings.json to switch from to

Launching through a screen When etherpad is running, there is no way to type other commands. Thus, we will use what is called a screen, that allows to have more tha none terminal window. If it is not already installed: apt-get install screen Then : screen # we have a blank new window ~/dossier_etherpad/etherpad-lite/bin/run.sh #launching We go back to the main terminal by using the shortcut : press Ctrl and a, then d. To go back to the screen, the command is screen - rd

What is the use of nginx? Through wget :9001, we check that etherpad works well, (we get an index.html file, its beginning is available with head index.html). We want to access the l’etherpad through the web, we shall use a proxy.

Installation of nginx We install it through : apt-get install -t wheezy-backports nginx We create te file : /etc/nginx/sites-available/etherpad And copy the configuration (next slide) Then, we create a symbolic link to the active configuration : ln -s /etc/nginx/sites-available/etherpad /etc/nginx/sites-enabled/ Then, we reload the server and (re)start the service. service nginx reload && service nginx (re)start

NginX configuration (you can simply copy/paste it with a few modifications) server { listen 80; // default web http port, sometimes may be 8080 server_ ; //replace it with YOUR public IP address, people will access the server through it access_log /var/log/nginx/etherpad.access.log; error_log /var/log/nginx/etherpad.error.log; location / { proxy_pass //exchanges data with the etherpad proxy_set_header Host $host; proxy_buffering off; proxy_set_header X-Real-IP $remote_addr; proxy_set_header Host $host; proxy_http_version 1.1; proxy_set_header Upgrade $http_upgrade; proxy_set_header Connection $connection_upgrade; } map $http_upgrade $connection_upgrade { default upgrade; '' close; }

We may now access etherpad through a web browser, and create an active sheet. If there is a problem with the nginx configuration, we get a http 502 bad gateway error.