Why is it important to keep the blue environment running after switching traffic to green in a blue-green deployment?

hard📝 Conceptual Q10 of 15

Kubernetes - Advanced Deployment Patterns

ATo save cluster resources by running both versions

BTo ensure blue pods receive some user traffic

CTo allow quick rollback if the green deployment fails

DTo automatically update blue pods with green code

Step-by-Step Solution

Solution:

Step 1: Understand rollback strategy
Keeping blue environment running allows immediate rollback if green has issues.
Step 2: Exclude incorrect reasons
Running both versions uses more resources; blue pods do not receive traffic after switch; no automatic code update occurs.
Final Answer:
To allow quick rollback if the green deployment fails -> Option C
Quick Check:
Blue kept running = Quick rollback option [OK]

Quick Trick: Keep blue live for fast rollback if needed [OK]

Common Mistakes:

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