You want to update a running deployment named webapp to use a new image version webapp:v2 without downtime. Which kubectl command should you use?

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Kubernetes - kubectl Essential Commands

You want to update a running deployment named webapp to use a new image version webapp:v2 without downtime. Which kubectl command should you use?

Akubectl set image deployment/webapp webapp=webapp:v2

Bkubectl delete deployment webapp && kubectl create deployment webapp --image=webapp:v2

Ckubectl apply -f webapp-v2.yaml without changing image

Dkubectl scale deployment webapp --replicas=0

Step-by-Step Solution

Solution:

Step 1: Identify the goal
You want to update the image of the deployment without downtime, meaning a rolling update.
Step 2: Choose the correct kubectl command
kubectl set image deployment/webapp webapp=webapp:v2 updates the image and triggers a rolling update safely.
Step 3: Understand why other options fail
Deleting and recreating causes downtime; applying without image change does nothing; scaling to zero stops pods.
Final Answer:
kubectl set image deployment/webapp webapp=webapp:v2 -> Option A
Quick Check:
Use 'kubectl set image' for zero-downtime update [OK]

Quick Trick: Use 'kubectl set image' for rolling updates [OK]

Common Mistakes:

Deleting deployment causes downtime
Applying without image change does not update
Scaling to zero stops the app

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More Kubernetes Quizzes

You want to update a running deployment named webapp to use a new image version webapp:v2 without downtime. Which kubectl command should you use?

Step 1: Identify the goal

Step 2: Choose the correct kubectl command

Step 3: Understand why other options fail

Final Answer:

Quick Check:

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