Introduction to CI/CD
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CI/CD stands for Continuous Integration and Continuous Deployment. It is a fundamental practice in modern DevOps workflows that focuses on automating the building, testing, and deployment of code whenever changes are pushed to a version control system like Git.
Why Use CI/CD?
Section titled “Why Use CI/CD?”CI/CD brings several advantages to infrastructure and software projects:
- Automation — Replaces manual steps with automated pipelines
- Speed — Accelerates feedback and deployment loops
- Reliability — Reduces the risk of human error
- Consistency — Ensures changes are applied the same way every time
- Collaboration — Allows teams to work more efficiently with shared workflows
CI/CD in This Project
Section titled “CI/CD in This Project”In this homelab project, CI/CD is used to automatically rebuild and deploy the NixOS configuration and the containerized services whenever changes are made to the configuration files in the Git repository.
This means:
- Any update to
configuration.nixor related files is instantly picked up - A GitHub Actions pipeline validates the configuration and applies it
- The remote NixOS VM is updated without needing to log in manually
This approach is crucial for maintaining a declarative, reproducible, and hands-off infrastructure environment.
Tool Used
Section titled “Tool Used”- GitHub Actions — Used to trigger workflows when commits are pushed
- OpenSSH — Securely connects to the remote NixOS machine
- nixos-rebuild — Rebuilds the system from the updated configuration
- Tailscale Github Action — Used to connect to the NixOS VM over a secure mesh network