Dockerizing and Deploying an Application on AWS with ECR

Dockerizing and Deploying an Application on AWS with ECR

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.

Subscribe to our newsletter

Read articles from Eagle's blog directly inside your inbox. Subscribe to the newsletter, and don't miss out.