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) │
└─────────────┘
Kubernetes Implementation
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Deployment Script
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AWS ALB Implementation
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Database Considerations
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Health Checks
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Rollback Strategy
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Blue-green deployments provide instant rollback capability and zero-downtime releases.