Dockerizing Ansible Playbooks

This is the generic process of creating Docker containers from existing Ansible Playbooks. This example creates a Wordpress application from a random wordpress ansible playbook found on Internet.

Multi-process approach

If you want to create Docker containers and use them in a similar way than the traditional virtual environments. In order to do that we are taking Ubuntu Base image that is friendly with Docker containers.

Everything related with the multi-process approach is under ansible-wordpress directory. Look at the file Makefile to see the actual commands.

Image creation

make container

Run container from image

make run_container

Now you can access to the wordpress application at port http://localhost:1800 and ssh at port 2200

Access via ssh (auto authentication)

make ssh-key

Run Docker Registry

make run_registry

Push Docker Registry

make push_registry

Pull Docker Registry

make pull_registry

Run Container from Registry

make run_container_registry

Microservices approach

Create two containers, one with MySQL (called "db") and the other one with Apache2 (called "web"). Apache2 will connect to MySQL in the container db.

Once both containers are up and running, you can access to wordpress at http://localhost:1800

If you need to access to the bash into the containers, you can use nsenter (look for an example at ansible-wordpress/Makefile), as ssh daemon is not working in the microservices.

Container db (MySQL)

Directory ansible-wordpress-microservices/dbserver/

Create db image from Dockerfile

make dbserver_container

Run db container

make run_dbserver_container_mysql

Container web (Apache2)

Directory ansible-wordpress-microservices/webserver

Create web image from Dockerfile

make webserver_container

Run web container

make run_webserver_container_apache

a4200/dockerizing-ansible