Dockerizing an Application

To dockerize an application, follow these steps:

• Create a repository for your application with the name of the application.

• Gather and save all the necessary files and dependencies required for your application.

• Write a Dockerfile with the appropriate steps and methods to dockerize your application. Here's an example of a Dockerfile:

# Use a base image

FROM <base_image>


# Set the working directory

WORKDIR /app


# Copy the necessary files to the working directory

COPY . /app


# Install dependencies

RUN <install_command>


# Set the environment variables from .env file

ENV <env_variable>=<value>


# Expose the required ports

EXPOSE <port>


# Specify the command to run the application

CMD [ "python", "app.py" ]

Note: It is recommended to create a separate .env file for your environmental variables and call them within the code. This allows easy modification or updates without starting from scratch.

• Build the Docker image using the following command in the terminal:

docker build -t <image_name> .

• Once the image is built, you can push it to Docker Hub:

docker push <docker_username>/<image_name>

Deploying Docker Image to AWS ECR

To deploy the Docker image to AWS Elastic Container Registry (ECR), follow these steps:

• Log in to your AWS account and navigate to the AWS Management Console.

• Create an ECR repository where you will be pushing the Docker image.

• Grant the repository the necessary role permissions to enable communication between Docker CLI and AWS CLI. This ensures proper authentication and authorization.

• Install and configure AWS CLI and Docker CLI on your local machine. Link them to your AWS account by running the following commands:

aws configure
aws ecr get-login-password --region <aws_region> | docker login --username AWS --password-stdin <aws_account_id>.dkr.ecr.<aws_region>.amazonaws.com

Note: Ensure you have the necessary IAM permissions to perform this task.

• Tag the Docker image you want to upload to AWS ECR with the repository URL:

docker tag <image_name> <aws_account_id>.dkr.ecr.<aws_region>.amazonaws.com/<repository_name>:<tag>

• Push the Docker image to AWS ECR:

docker push <aws_account_id>.dkr.ecr.<aws_region>.amazonaws.com/<repository_name>:<tag>

Congratulations! You have successfully uploaded your Docker image to AWS ECR.