[Solved] Given this YAML snippet for a Deployment: apiVersion: apps/v1 kind: Deployment metadata: name: myapp spec: replicas: 3 selector: matchLabels: app: myapp template: metadata: labels: app: myapp spec:... | Kubernetes

Kubernetes - Fundamentals

Given this YAML snippet for a Deployment:

apiVersion: apps/v1
kind: Deployment
metadata:
  name: myapp
spec:
  replicas: 3
  selector:
    matchLabels:
      app: myapp
  template:
    metadata:
      labels:
        app: myapp
    spec:
      containers:
      - name: web
        image: nginx:1.19

If one pod crashes and stops running, what will Kubernetes do?

ACreate a new pod to maintain 3 replicas.

BDo nothing and keep 2 pods running.

CDelete all pods and restart the deployment.

DScale down the deployment to 2 replicas.

Step-by-Step Solution

Solution:

Step 1: Understand the desired replicas
The Deployment specifies 3 replicas, so Kubernetes wants 3 pods running.
Step 2: Reconciliation after pod crash
If one pod crashes, Kubernetes detects the actual state has only 2 pods and creates a new pod to restore 3 replicas.
Final Answer:
Create a new pod to maintain 3 replicas. -> Option A
Quick Check:
Pods count fixed to desired replicas [OK]

Quick Trick: Pods auto-recreated to match replicas [OK]

Common Mistakes:

Thinking Kubernetes ignores crashed pods
Assuming deployment restarts all pods
Believing deployment scales down automatically

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More Kubernetes Quizzes

Given this YAML snippet for a Deployment:

Step 1: Understand the desired replicas

Step 2: Reconciliation after pod crash

Final Answer:

Quick Check:

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