Creating a Docker Compose File: A Step by Step Guide
Step 1: Install docker compose
- Install docker compose file by using following commands
sudo curl -L
https://github.com/docker/compose/releases/download/1.22.0/docker-compose-$(uname -s)-$(uname -m) -o /usr/local/bin/docker-compose
Step 2: Create Docker Compose file
- Here is the docker compose file to run container
version: ‘3.3’
services:
db:
image: mysql:8.0.27
command: ‘–default-authentication-plugin=mysql_native_password’
volumes:
– db_data:/var/lib/mysql
restart: always
environment:
– MYSQL_ROOT_PASSWORD=somewordpress
– MYSQL_DATABASE=wordpress
– MYSQL_USER=wordpress
– MYSQL_PASSWORD=wordpress
expose:
– 3306
– 33060
wordpress:
image: wordpress:latest
ports:
– 80:80
restart: always
environment:
– WORDPRESS_DB_HOST=db
– WORDPRESS_DB_USER=wordpress
– WORDPRESS_DB_PASSWORD=wordpress
– WORDPRESS_DB_NAME=wordpress
volumes:
db_data:
Step 3: Run Containers by using docker compose up
- Once the docker-compose.yml file is configured, you can start the containers using the docker-compose up command. Now start our services by using following command
docker-compose up -d
Docker Compose vs. Dockerfile with Code Examples
Docker is an open-source platform that empowers developers to automate the deployment of applications inside lightweight, portable containers. Containers encapsulate an application and its conditions, ensuring consistency across various conditions, from advancement to production, the Dockerfile and the Docker Compose file are two essential Docker tools that make containerization easier.
A set of instructions for making a Docker image can be found in a text file called a Dockerfile. Each instruction in a Dockerfile creates a layer in the image, ensuring the consistency and reproducibility of the application and its dependencies.
Then again, a Docker Compose file is utilized to define and run multi-container Docker applications. Docker Compose makes it simpler to orchestrate complex applications by allowing users to set up and manage multiple containers, networks, and volumes through the use of a straightforward YAML configuration file
Understanding how to make and utilize Dockerfiles and Docker compose files is essential for anybody seeking to influence Docker for proficient application deployment and the executives. This guide will go over the fundamentals of these tools, show you how to make and use them, and give real-world examples to show how to do so.