In this blog post, we will walk through how to Dockerize a CodeIgniter 3 application. By the end of this guide, you'll have a containerized application running with Apache, PHP, and MySQL, all managed via Docker Compose. This approach will streamline your development environment and ensure consistent setups across multiple systems.
Before we dive into the details, make sure you have the following tools installed:
The Dockerfile defines the environment in which your application will run. Here’s how to set it up:
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Now let’s define a docker-compose.yml file, which will configure and run multiple containers for both your web application and the database.
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Once your Dockerfile and docker-compose.yml files are ready, it’s time to build and run the containers. In your project root, open a terminal and run the following commands:
Build the Docker images:
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Start the containers:
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This will start both the CodeIgniter application and the MySQL database. The app container will be accessible at http://localhost:8080, while the MySQL database will run on port 3306.
Now, let’s ensure that CodeIgniter can connect to the MySQL database inside the container. Open your application/config/database.php and update the database connection settings:
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Once the containers are up, visit http://localhost:8080 in your web browser. If everything is set up correctly, your CodeIgniter 3 application should be running smoothly inside a Docker container.
To stop the containers, run:
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In this guide, we successfully Dockerized a CodeIgniter 3 application, making it portable and easy to manage. Docker Compose allows us to define and run multi-container applications with ease, making it perfect for development and production environments.
By using Docker, you ensure a consistent environment for all developers and easily deploy your application to various systems without worrying about dependencies. If you’re looking to scale your application or run it in a cloud environment, Docker makes it incredibly simple to manage.
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