How to deploy Docker on AWS?

Deploying Docker on AWS involves a step-by-step process. Here’s a simple guide on how to deploy a Docker application on AWS.

Step 1: AWS Installation and Configuration

First, you need to install the AWS CLI. Then configure it using ‘aws configure’ to set your access key, secret key, and default region.

Step 2: Install Docker

You will need Docker installed on your computer to create Docker images. Follow the directions provided by Docker for your specific operating system.

Step 3: Create a Dockerfile

In your application’s root directory, create a document named “Dockerfile” This document will include all instructions for Docker to build your docker image.

Example:

```

Use an official python runtime as a parent image
FROM python:3.7-slim

Set the working directory to /app
WORKDIR /app

Add the rest of the code
ADD . /app

Install any needed packages specified in requirements.txt
RUN pip install —trusted-host pypi.python.org -r requirements.txt

Make port 80 available to the world outside this container
EXPOSE 80

Run app.py when the container launches
CMD [“python”, “app.py”]
```

Step 4: Build your Docker Image

Within the same directory as your Dockerfile, run the following command:

```
docker build -t your_image_name .
```

Step 5: Test your Docker Image Locally

You can run your Docker image locally to test it using the following command:

```
docker run -p 4000:80 your_image_name
```

Step 6: Upload your Docker Image to a Registry

You can either use Docker’s own registry, Docker Hub or AWS’s registry, ECR. Instructions will vary but involve logging in to the registry and pushing your image to it.

Step 7: Create a new Task Definition in your AWS ECS

Here, you choose the Docker Image to run, how much CPU and memory to utilize, and lots of other settings.

Step 8: Create a new Application Load Balancer in your AWS EC2

This load balancer will route HTTP/S traffic to multiple URLs across multiple instances.

Step 9: Create a New ECS Service

Here, select your task definition and configure the number of tasks to run and where.

That’s it. You have successfully deployed a Docker Application into an AWS Cluster.

Remember to update your task definitions when your docker application is updated.