Project proposal: Developing a DevOps Pipeline for a TypeScript Web Application

[PierreSegerstrom]

Assignment Proposal

Title

Developing a DevOps Pipeline for a TypeScript Web Application

Names and KTH ID

• Felix Castillo Huber (felixhh@kth.se)
• Pierre Segerström (pise@kth.se)

Deadline

• Task 3

Category

• Project

Description

Will utilize an existing web application – which currently lacks any DevOps components – and integrate a CI/CD DevOps pipeline on top of it.

Development platform:
GitHub

CI Pipeline
We will set up the CI pipeline using GitHub actions. This will:

• Run tests (conditionally, depending on file type).
• Verify that test coverage (e.g. statement coverage) is above certain threshold.

CD Pipeline
GitHub Actions will also be used to:

• Create a Docker image and push it to DockerHub.
• Every Docker image will be tagged with the hash of the commit that triggered the build.
• Will interact with a local GitHub Actions Runner, which receives the git hash, which is then passed to terraform, in order to re-run terraform apply to provision Docker containers using the new image.

Infrastructure as Code techniques
The app will be deployed locally, using Terraform to provision:

• At least 2 app containers
• A load balancer
• A database container

Why using Terraform for this case, when Docker Compose achieves practically the same thing?
We are aware of this fact. However, by pursuing this setup, we can model how this scenario would interact with “real” cloud-based providers. Going for this “local approach” is purely for convenience and easier sharability of the repo.

Quality or security automation

• Enforce linting
• Static type checking
• Dependency vulnerability scanning

Relevance

The project will demonstrate how the core aspects of DevOps can be integrated into an existing web-based application. Nevertheless, the pipeline structure is highly applicable across any deployable application, since the same principles carry over.

Performing this project will illustrate two things clearly:

1. What value does a DevOps pipeline contribute to a project that is lacking it completely?
2. How an application can be deployed automatically, entirely on one local machine.