DumpLinks -- Running Web Application Inside A Container

The focus of this project is to build Docker Image for Web Application and Host the web app inside a container & Run Docker container in Cloud (AWS)

Link to Image in Dockerhub repository: https://hub.docker.com/repository/docker/suhasgumma/dumplinks

To get the image using shell, use the following command:

docker pull suhasgumma/dumplinks

Flow of the Project

• Develop A Web Application
• Write Dockerfile
• Build Docker Image using the Dockerfile
• Write docker-compose.yml file
• Run the App inside the containers using Docker Compose
• Push Docker Image to Dockerhub repository
• Run on AWS' EC2 Instance

Summary of what the web app does

It takes a Unique Key and stores multiple links and text associated with that key. Users could access the links and text stored associated with that U Unique Key later from any device.Used reactJs for our application logic & backend.Used firebase for storing data.

Snippets of the website

Writing a Dockerfile

• Since the Web App uses nodeJs, I used official "node" image as base Image available in dockerhub
• Set the working directory to /app
• Copied package.json
• Ran 'npm install' to get the node modules
• Copied all the other code

Building a Docker Image

Building an image is quite simple after writing the Dockerfile. Just run the command..

docker build . -t dumplinks

Writing docker-compose.yml file

The only use for docker-compose file in the application is to bind host machine port to container port. In the case of this application, I binded the port 3000 of container to port 3000 of host machine. This means all traffic hitting port 3000 of host will be directed to port 3000 of container.

Running the web application inside the container

Using docker run

docker run -p 3000:3000 -d dumplinks

Using Docker Compose

docker-compose up

List all running Containers

docker ps

Opening bash shell inside a running container

docker exec -it <container> bash

Push Docker Image to Docker Hub Repository

Login using docker hub credentials and run the following command

docker push <imageName>:<image Tag>

Run on AWS' EC2 instance

• Launch any EC2 instance on AWS. Now, ypu have a VM which is similar to your local machine in your hands.
• Connect to EC2 instance using SSH
• Install Docker and run in the same way you did in your machine