Docker and CI/CD · Junior · Question 59 of 75

What is blue-green deployment?

1Deploying the frontend and backend at different times
✓Correct answer: Running a new version beside the old, then switching traffic
3Painting the status page green after every deploy

Explanation

The old environment stays ready, so a rollback is just switching traffic back. The cost is running two environments during the switch.

Further reading

Martin Fowler: Blue-Green Deployment ↗

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