docker and docker-compose

Docker

Docker is a containerization platform that enables rapid development, testing, and deployment of applications. It packages software into standardized units known as containers, which contain all the necessary components for the software to run, including libraries, system tools, code, and runtime.

Steps:

To containerize our application, we need the Docker software, which can be downloaded from the following link: Docker

Here are some fundamental Docker commands:

docker --version
docker search
docker pull
docker run
docker ps
docker stop
docker restart
docker exec
docker push
docker rmi

To containerize our application, we need to create a Dockerfile as follows:

# base public image
FROM php:8.1.1-apache
COPY ./ttms /var/www/html

RUN echo "ServerName localhost" >> /etc/apache2/apache2.conf

#install the mysqli module
RUN docker-php-ext-install mysqli
EXPOSE 80

To build the image, you can use the following command: docker run -t . ttms:1.0

You can view the built image by using the command docker images.

To run the Docker image, execute the following command: docker run --name ttmscontainer -p 80:80 ttms:1.0.

To see the list of containers, you can utilize the command docker ps.

You can access the container from the browser using the container's IP address. To obtain the container's IP address, you can use the command docker inspect containerID.

You can access the container by using its IP address with port 80.

Docker Compose

Docker Compose Logo

Docker Compose is a tool designed to simplify the definition and sharing of multi-container applications. With Compose, you can create a YAML file to specify the services, and using a single command, you can easily start everything up or completely remove it.

To containerize our application, let's create a Docker Compose file as shown below and save it as 'docker-compose.yml'.

version: "20.10.23" # docker version   
services:
  www:
    build: ./
    container_name: ttms
    volumes:
      - "./:/var/www/html" # Sync project dir with container we dir
    ports:
      - "80:8080" # Expose port 80 to host
      - "443:443" # Expose port 443 to host for future ssl traffic
  phpmyadmin: #workspace to view the database content
    image: phpmyadmin/phpmyadmin
    ports:
      - "8001:80"
    environment:
      - PMA_HOST=timetable.cd2ekhi0lppt.ap-south-1.rds.amazonaws.com
      - PMA_PORT=3306

To launch multiple containers, use the command docker-compose up.

To list the containers, use the command docker ps.

To stop and remove multiple containers, you can use the command docker-compose down.

You can access the container by using its IP address with port 80.

Thanks for reading! I hope you found this helpful and informative.

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