Comparing deployment strategies: Canary, blue-green, and rolling

The article explores three modern software deployment strategies—blue-green, canary, and rolling—highlighting their respective advantages and challenges. Blue-green deployment involves maintaining two identical environments, allowing for seamless updates with zero downtime but at a high infrastructure cost, making it suitable for major updates. Canary deployment tests new features on a small user subset, offering real-time feedback and reduced risk of widespread issues, though it can be time-consuming and complex. Rolling deployment updates application instances in stages, minimizing downtime and risk but requiring careful management and backward compatibility. Each strategy has unique benefits and drawbacks, with the choice depending on a team's specific needs, budget, and infrastructure capabilities.