Building a wordpress application out of containers.

Now that we know about images and containers, lets put it all together and build an application out of this. We are going to use a Wordpress image and a Mysql image and link them to access our word press blogsite on our localhost/VM IP. We first install a mysql image using command

docker pull mysql

Now we run the container from this image

docker run --name purbid -e MYSQL_ROOT_PASSWORD=root -d mysql 

And then attach to the detached container

docker exec -it <cont_id> bash

We now take a wordpress image and ,run a container and link that container to the database.

docker run --name wordpress_pb --link <cont_name>:mysql -p 8080:80 -d wordpress

The wordpress site can now be accessed at http://127.0.0.1:8080 or :8080

In case, an external database is to be used,

$ docker run --name some-wordpress -e WORDPRESS_DB_HOST=10.1.2.3:3306 \
    -e WORDPRESS_DB_USER=... -e WORDPRESS_DB_PASSWORD=... -d wordpress