Week 16 lab

Week 16 Lab exercises on CI and CD. Using Github actions

This is a rudimentary Express.js based website. Your job is to get the CI fully setup and also the CD to get it deployed to AWS. Make a change and see it re-deployed

Project structure

# main project directories
.
├── app
│   ├── app.js                # main application entrypoint
│   ├── lib                   # our hello greetings library
│   ├── routes                # HTTP route logic contained here
│   └── views                 # HTML templates stored here
├── infra
│   ├── deploy.sh             # main cloudformation launch script placeholder
│   └── ec2-user-data.sh      # script to pre-configure your ec2 instance
├── README.md                 # This doc

Development

# running locally, sits on port 3000 by default
(cd app && DEBUG=* PORT=3000 npm start)
# to test
curl http://localhost:3000/\?language\=gurmukhi
# or launch in browser
firefox http://localhost:3000/?language=gurmukhi

# unit testing
(cd app && npm test)

# linting
(cd app && npm run lint)

# security audit
(cd app && npm aduit)

Your mission

1. Fork the repo
2. Get it working locally
3. implement the missing steps in .github/workflows/main.yaml
   1. Add supply chain scanning and fix any issues
   2. Add unit testing
4. Create base infra as per two objectives and target arch below
5. Get infra scripts and continious deployment working
6. Implement the /about page and watch it deploy end-to-end

Objective 1 - get base infra working - get networking and CI working

• Create VPC: 10.0.0.0/22
• Get Github actions to deploy your IaC
• Create Pub subnet:
  • a: 10.0.0.0/24
• Create Pvt Subnets:
  • a: 10.0.2.0/24
• Create IGW
• Create Public Route Table
• Create NAT gateway
• Create Private Route Table

Objective 2 - create secondary infra

• Clickops a t3.micro instance in a public subnet with port 22,80,8080 open and ssh in
  • Use the infra/ec2-user-data.sh script to get your application working on there
  • ssh ec2-user@<instance-public-ip>
• Delete that instance and script a t3.micro instance into the private subnet
• script a Network load balancer (NLB)
• Connect load balancer to instance
• Test application via load-balancer

Links

• Github actions getting started
• EJS templating https://ejs.co/
• Counterstrike cloudformation https://github.com/jujhars13/counterstrike-server