Blue-Green Deployments: Zero-Downtime Releases

Blue-green deployments eliminate downtime by running two identical production environments.

How It Works#

Before deployment:
┌─────────────┐     ┌─────────────┐
│   Router    │────▶│    Blue     │  (Live)
└─────────────┘     │  (v1.0.0)   │
                    └─────────────┘
                    ┌─────────────┐
                    │    Green    │  (Idle)
                    │  (v1.0.0)   │
                    └─────────────┘

After deployment:
┌─────────────┐     ┌─────────────┐
│   Router    │     │    Blue     │  (Idle)
└─────────────┘     │  (v1.0.0)   │
        │           └─────────────┘
        │           ┌─────────────┐
        └──────────▶│    Green    │  (Live)
                    │  (v2.0.0)   │
                    └─────────────┘