Is All CD/CD Pipeline Code Instant Legacy Code?

The Mob Mentality Show

In this Mob Mentality Show episode, Chris Lucian and Austin Chadwick dive into the complexities of modern CI/CD (Continuous Integration / Continuous Delivery) pipeline code and IaC (Infrastructure as Code), exploring why these critical components of software delivery often exhibit the same problematic attributes as classic Legacy Code. Drawing inspiration from Michael Feathers' seminal book *Working Effectively with Legacy Code*, they analyze the paradox of cutting-edge DevOps practices turning into technical debt almost as soon as they're written.

### Episode Highlights:
- **CI/CD Pipeline Code and Legacy Code Parallels**: Why does so much CI/CD and IaC code resemble legacy code? Despite being crucial for continuous delivery and automation, CI/CD pipelines can become fragile, difficult to change, and filled with technical debt if not handled carefully. Austin and Chris discuss why this phenomenon is so common and what makes the codebases for CI/CD pipelines especially prone to these issues.
- **“Edit and Pray” vs. TDD Confidence**: Do your CI/CD changes feel like a roll of the dice? Chris and Austin compare how the lack of test-driven development (TDD) practices in CI/CD code leads to “edit and pray” scenarios. They discuss the confidence that TDD brings to traditional application development and how applying similar principles could reduce fragility in CI/CD code.

- **The Pitfalls of YAML in IaC**: Is the problem inherent to YAML? The hosts explore whether the complexity of YAML syntax and configurations is the root cause of the brittleness often found in IaC. They provide real-world examples of IaC configurations that suffer from high cyclomatic complexity—making them feel more like full-blown applications rather than simple configuration files.

- **Fear of Change in CI/CD and IaC**: Why are developers often afraid to modify CI/CD pipeline code or IaC? Chris and Austin highlight the psychological aspects of fragile infrastructure—where fear of unintended consequences and lack of fast feedback loops result in slower iterations and more bugs. They explore why these codebases are often re-written from scratch instead of extended and safely enhanced.

- **Reducing Fragility through Experiments**: The episode features a recent experiment where CI/CD pipeline code was developed in Python using TDD and separation of concerns. This case study reveals the pros and cons of less YAML and a shift towards more code-based "configurations." Could this approach be a solution to reducing brittleness in IaC and pipelines?

- **A World Without Brittle Pipelines?**: Imagine a world without fragile pipelines and brittle configuration files. Chris and Austin discuss strategies to move towards more resilient infrastructure and how teams can focus on improving feedback loops, reducing complexity, and enabling safer, faster CI/CD iterations.

Join Chris and Austin as they explore these and other crucial topics that are impacting DevOps teams around the world. Whether you're struggling with high bug rates in your pipelines, slow feedback loops, or simply want to better understand how to manage the complexity of modern infrastructure, this episode is for you!

Video and Show Notes: https://youtu.be/3Cs-j055b9g