CI/CD from GitHub to AWS EC2 using GitHub action

I have heard about CI/CD for a long time but never tried it by myself. But I didn’t know how much fun is this. Just some line of code can automate the whole test and deployment thing. Let's see how I achieved this.

I am not going to describe what is CI/CD and GitHub action in book language. There are a lot of resources for that.

According to me CI is checking the application is working or not and CD is deliver the application . Obviously both is in automatic way . But it can do a lots of things. This is just a scratch . GitHub action is a tool which will help us to achieve CI/CD easily and this is also free for certain time limit .

TL;DR

1. Get public ssh key of EC2 instance
2. Put the public ssh key in the Git repository’s deploy keys
3. Get the private key, hostname, and user name of the AWS EC2 instance
4. Create the .yml file in GitHub to build and deploy the application.

We will use this GitHub repository. But to use this repository we need to install docker and docker-compose in our EC2 instance. Docker can be installed from here and docker-compose from here .

Let's start with the description. First, we need to get the ssh key.

[ec2 instance]$ ssh-keygen -t rsa

Generating public/private rsa key pair.
Enter file in which to save the key (/home/ubuntu/.ssh/id_rsa): 
Enter passphrase (empty for no passphrase): 
Enter same passphrase again: 
Your identification has been saved in /home/ubuntu/.ssh/id_rsa
Your public key has been saved in /home/ubuntu/.ssh/id_rsa.pub

If we do not provide any file name this will create two files named id_rsa and id_rsa.pub in the .ssh folder. We will copy the key inside of id_rsa.pub and put it in GitHub deploy key. We will find the deploy key in the settings of our repository.

Give a tick in “Allow write access ”. We need this so that we do not need to give GitHub username and password every time we pull from EC2 instance . Now clone the repository using SSH .