You want to update a ReplicaSet to increase replicas from 2 to 5 but keep the same pods running without downtime. What is the best approach?

hard📝 Workflow Q15 of 15

Kubernetes - ReplicaSets and Deployments

AScale the ReplicaSet using kubectl scale command to 5 replicas

BDelete the ReplicaSet and create a new one with replicas: 5

CEdit the ReplicaSet YAML to set replicas: 5 and apply it

DChange the pod template labels to new values and apply

Step-by-Step Solution

Solution:

Step 1: Understand scaling ReplicaSet
Scaling with kubectl scale updates replicas live without downtime.
Step 2: Evaluate other options
Editing YAML and applying works but less safe than scale command. Deleting ReplicaSet causes downtime. Changing labels breaks pod matching.
Final Answer:
Scale the ReplicaSet using kubectl scale command to 5 replicas -> Option A
Quick Check:
Use kubectl scale for live replica changes [OK]

Quick Trick: Use kubectl scale to change replicas live [OK]

Common Mistakes:

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