Docker Compose👩🏻‍💻

Docker Compose is a tool for defining and running multi-container Docker applications.
With Docker Compose, you can specify all the services your application needs, their configurations, network connections, and dependencies.
This file, typically named docker-compose.yml, provides a clear and consistent way to launch and manage your entire application stack with a single command.

The main use of Docker Compose is to simplify the process of orchestrating and deploying multi-container applications.

It's particularly helpful for development environments, testing, and local setups, as it streamlines the setup of multiple containers that need to work together.

By defining the configuration in a YAML file, you can easily recreate consistent environments across different systems and share them with your team.

What is YAML?

• YAML is a human-readable data serialization language that is often used for writing configuration files.

• YAML is commonly used for configuration files in various software applications, including Docker Compose, Kubernetes, Ansible, and more.

Task-1

Learn how to use the docker-compose.yml file, to set up the environment, configure the services and links between different containers, and also to use environment variables in the docker-compose.yml file.

1. Install docker-compose on Amazon Linux:

sudo curl -L "[github.com/docker/compose/releases/latest/d..](github.com/docker/compose/releases/latest/d.. -s)-$(uname -m)" -o  /usr/local/bin/docker-compose

sudo chmod +x /usr/local/bin/docker-compose

1. Create a docker-compose.yaml file in project directory:

   

2. verify the docker-compose.yaml file

   

3. run the command docker-compose up -d

   

4. Checking the status of created servers: docker-compose ps -a

   

5. Through docker-compose file nginx has crested and it's up and running fine

   

Task-2

1. Pull a pre-existing Docker image from a public repository (e.g. Docker Hub) and run it on your local machine. Run the container as a non-root user (Hint- Use usermod command to give user permission to docker). Make sure you reboot instance after giving permission to user.

-To pull pre-existing docker image, you first need to login to your docker hub registry

-Pulling a custom image from docker hub using command:

docker pull repository_name/image_name:tag

-Verify pulled image is showing in your local repo: docker images

-Created container from the image

-Inspect the container's running processes and exposed ports using the docker inspect command.

-Use the docker logs command to view the container's log output.

-Use the docker stop and docker start commands to stop and start the container.

-Use the docker rm command to remove the container when you're done.

How to run Docker commands without sudo?

• Make sure docker is installed and system is updated (This is already been completed as a part of previous tasks):

• sudo usermod -a -G docker $USER

• Reboot the machine.

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Thank you for reading. Happy Learning 😊