[Solved] Given this Pod spec snippet, what will happen when the Pod starts?initContainers: - name: wait-for-db image: busybox command: ['sh', '-c', 'until nslookup db-service; do echo waiting; sleep 2;... | Kubernetes

Kubernetes - Pods

Given this Pod spec snippet, what will happen when the Pod starts?

initContainers:
- name: wait-for-db
  image: busybox
  command: ['sh', '-c', 'until nslookup db-service; do echo waiting; sleep 2; done']
containers:
- name: app
  image: myapp

AThe init container runs in parallel with the app container

BThe app container starts immediately without waiting

CThe Pod fails because 'nslookup' is not a valid command

DThe init container waits until 'db-service' DNS resolves before app starts

Step-by-Step Solution

Solution:

Step 1: Understand init container behavior
Init containers run before app containers and must complete successfully before the app starts.
Step 2: Analyze the command in init container
The command loops until the DNS name 'db-service' resolves, so it waits for the database service to be ready.
Final Answer:
The init container waits until 'db-service' DNS resolves before app starts -> Option D
Quick Check:
Init container waits for service readiness [OK]

Quick Trick: Init containers run sequentially and block app start [OK]

Common Mistakes:

Thinking init containers run in parallel
Assuming app starts immediately
Believing 'nslookup' is invalid in busybox

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More Kubernetes Quizzes

Given this Pod spec snippet, what will happen when the Pod starts?

Step 1: Understand init container behavior

Step 2: Analyze the command in init container

Final Answer:

Quick Check:

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