hello and welcome everyone to the meetup on wordpress with docker

Introduction to a meetup covering WordPress with Docker, suitable for beginners and advanced users. Explains the basics of Docker, its features, installation process, and setting up WordPress with Docker.

What is Docker?

• Docker is an open-source platform for building container-based applications.

• Containers are lightweight execution environments that run code in isolation from each other.

Setting Up Docker

• Requires a Linux server to manage; can run the Linux server in a virtual machine.

• Docker acts as both a client-side program and a server program managing the Linux system.

Advantages of Using Docker

Discusses why using Docker is beneficial compared to traditional setups like MAMP or XAMPP.

Simplified Workflow

• Friendly CLI workflow makes it accessible to developers of all skill levels.

• Provides consistency between development and production environments, enhancing collaboration among team members.

Agile Development

• Enables quick setup from a single package, ensuring dependencies are self-contained.

• Facilitates collaboration by allowing the use of community-provided images and easy sharing of custom Docker files.

Current Status of Docker

Highlights the widespread adoption of Docker containers across various platforms.

Ubiquity of Docker Containers

Introduction and Comparison: Virtual Machine vs. Docker

Devarshi explains the differences between virtual machines and Docker, focusing on resource usage and process isolation.

Virtual Machine vs. Docker

• Virtual machines run their own operating system, while containers share the host OS kernel.

• VMs are more resource-intensive due to running a full OS, leading to longer boot times compared to Docker containers directly on the host system.

• Process isolation: VMs offer hardware-level isolation, whereas Docker provides operating system-level isolation, making containers more lightweight with faster boot times.

• Difficulty in finding pre-built images for VMs tailored to specific needs compared to readily available Docker images for applications.

Understanding Docker Workflow

Explains the flow of how Docker works under the hood, detailing images, containers, and building new images from stopped containers.

Docker Workflow

• Images in Docker are files containing necessary configurations for running services. Running docker run creates a container with processes inside it.

• Stopping a container using docker kill does not delete it but marks it as exited; creating a new image from an exited container is possible with docker commit.

• A container is self-contained software unit bundling code, config, processes, networking dependencies, and an OS to run services efficiently.

Installing and Creating Containers in Docker

Demonstrates installing Docker, pulling images automatically or manually creating containers from existing images.

Installing and Creating Containers

• Installation steps vary for Mac OS, Windows, Linux; shared slides contain installation details post-session. Pulling an image can be automated by Docker or manually done using docker pull.

• Creating a container involves running docker run with an example of spinning up an Ubuntu container interactively using flags like -i for interactive access and -t for pseudo TTY.

yaml file Configuration for Docker Environment

In this section, the speaker explains how to configure a Docker environment using a YAML file.

Configuring Docker Environment

• The YAML file configures the Docker environment and is straightforward. It will be used in setting up WordPress with Docker.

• The compose file for WordPress environment is divided into parts for clarity.

• Defines services starting with version 3.3 and specifies the composer service using the composer image.

• Mounts local directory 'wordpress' to the container at '/app' path using volumes.

Setting Up Containers: MySQL, PhpMyAdmin, and WordPress

This section covers setting up MySQL, PhpMyAdmin, and WordPress containers in a Docker environment.

Setting Up Containers

• Configures MySQL container with 'restart always' flag for automatic restart on failure.

• Introduces 'depends on' feature for PhpMyAdmin to wait until MySQL starts before running.

• Specifies ports for accessing services on different ports externally.

• Sets up WordPress container with dependencies on MySQL and Composer images.

Demonstration of Setup and Accessing Services

Demonstrates running containers and accessing services like WordPress and PhpMyAdmin.

Demonstration

• Runs docker-compose up to create containers for MySQL, Composer, PhpMyAdmin, and WordPress.

• Accesses WordPress installation through a browser after setup completion.

• Logs into Wordpress admin panel using default credentials after installation.

Accessing PhpMyAdmin and Conclusion

Shows how to access PhpMyAdmin and concludes the demonstration.

Accessing PhpMyAdmin

• Accesses PhpMyAdmin by specifying server name as 'mysql' with username 'root' and password 'root'.

Conclusion

• Summarizes the deployment process of Wordpress locally via Docker setup. Mentions resources for further learning about Docker and coding.