Blue-Green Deployment

Concept

Blue environmentCurrent production (live)
Green environmentNew version (standby)
Load balancer / DNS switchInstant traffic switch
Rollback = switch back to blueZero-downtime rollback

Steps

1. Deploy v2 to GreenGreen runs new version
2. Run smoke tests on GreenVerify Green is healthy
3. Switch LB to GreenGreen becomes production
4. Monitor for errorsWatch metrics/logs
5. Keep Blue for rollbackKeep Blue up for quick revert
6. Decommission BlueAfter confidence period

Related Tools

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