In the age of modern software development, manually uploading files to a server via FTP or manually running tests before every release are relics of the past that lead to errors and delays. If you want your development process to be professional, you need to understand, What is a CI/CD pipeline in DevOps? and how to implement it. It is a mechanism that allows changes to be delivered to users in a predictable, secure and fully automated manner.
What is CI/CD? Definition and key stages
CI/CD is a combination of two practices that form the backbone of the DevOps culture. Their aim is to reduce the time between writing code and deploying it to production.
- Continuous Integration (CI): It involves frequently committing code changes (e.g. several times a day) to a shared repository. Each „push” triggers an automatic build and test process, enabling errors to be detected immediately.
- Continuous Delivery / Deployment (CD): That’s a step further. In the case of Delivery, the code is always ready to be implemented, and publishing it takes just one click. In Deployment, any change that passes testing is automatically deployed to the production servers.
With this approach, you avoid the so-called „integration hell”, where, at the end of the sprint, it turns out that changes made by different developers don’t work together.
GitHub Actions: Your DevOps command centre
GitHub Actions is a powerful tool integrated directly into your repository, allowing you to create workflows that automate any task. Instead of paying for external tools, you can define the entire CI/CD pipeline DevOps in a simple YAML file.
The main advantages of GitHub Actions:
- Free minutes: The tool is free for public repositories and offers generous limits for private ones.
- A huge marketplace: Access to thousands of pre-built actions created by the community (e.g. logging into AWS, sending messages on Slack or configuring containers).
- Close integration: Everything is in one place – the code, pull requests and deployment statuses.
Before you start building your pipeline, make sure your application is properly set up for the infrastructure. Check out our guide: Docker – containerisation for developers.
Building our first CI/CD pipeline – a practical tutorial
Imagine a Node.js application. We want it so that every time code is added to a branch main GitHub automatically checked the code quality, ran the tests and – if everything was in order – deployed the application to the server.
Step 1: Configuring the YAML workflow
In the folder .github/workflows/ create a file main.yml. This is where you define the jobs and steps.
Step 2: Running tests and linting
Your first task is to make sure the code works. The pipeline should install dependencies, run ESLint and unit tests. This is where you’ll find out if your latest change has broken anything. If the tests fail, the pipeline will be interrupted and you will receive a notification. You can read about how to write effective tests here: Application testing – unit tests in JavaScript.
Step 3: Secret management
Database passwords or AWS API keys should never be included in the code. GitHub offers a section Secrets and Variables, where you can store sensitive data securely. GitHub Actions will only inject it into your process when the pipeline is running.
Automated deployment: AWS, Vercel and rollbacks
The real magic happens during the deployment stage. Once the tests have passed, GitHub Actions can connect to your server (e.g. AWS EC2 via SSH) and fetch the latest version of the code, or build a Docker image and push it to the registry.
What if something goes wrong?
Modern CI/CD pipeline DevOps must include a rollback strategy. If monitoring detects errors after deployment, the system should automatically revert to the previous, stable version of the application. Thanks to GitHub Actions and container image versioning, such a rollback takes just a few seconds.
You can also integrate the pipeline with Slack or Microsoft Teams. This means the whole team will receive a notification saying: „Deployment of version 2.1.0 to production completed successfully!”. This builds a great deal of trust in the process and gives developers peace of mind.
Why is understanding CI/CD crucial for your career?
The question is, What is a CI/CD pipeline in DevOps?, … comes up in almost every job interview for mid-level and senior roles. Companies are no longer looking for people who „just write code” – they’re looking for engineers who can manage the entire software development lifecycle. Automation saves time, money and stress.
If you’d like to explore this area further, I recommend taking a look at DevOps Roadmap, which shows just how many tools (from Terraform to Kubernetes) you can integrate into your workflows. You can also find the official tutorials on the website GitHub Actions – documentation.
It’s time for your first automation
Implementing CI/CD isn’t just a technical change – it’s a shift in working philosophy. Instead of dreading deployments on Friday afternoons, you can rely on your automated tests and your pipeline to ensure quality for you.
At 4ADStudio, we believe that every modern business should take advantage of the benefits of automation. We help our clients design and implement advanced pipelines that eliminate human error and accelerate product development.
Is your deployment process chaotic and error-prone? Would you like your application to deploy itself with just one click? Get in touch with us! Our DevOps and GitHub Actions experts will help you build a pipeline that will make your work a breeze.
