[Solved] Given this Kubernetes Pod spec snippet using a ConfigMap:envFrom: - configMapRef: name: app-configWhat happens if you update the ConfigMap 'app-config' while the Pod is running? | Kubernetes

Kubernetes - ConfigMaps

Given this Kubernetes Pod spec snippet using a ConfigMap:

envFrom:
  - configMapRef:
      name: app-config

What happens if you update the ConfigMap 'app-config' while the Pod is running?

AThe Pod crashes immediately.

BThe Pod automatically reloads the new configuration without restart.

CThe Pod continues using the old configuration until restarted.

DThe Pod deletes the ConfigMap.

Step-by-Step Solution

Solution:

Step 1: Understand envFrom with ConfigMap
Using envFrom loads ConfigMap data as environment variables at Pod start.
Step 2: Effect of ConfigMap update on running Pod
Environment variables do not update dynamically; Pod must restart to see changes.
Final Answer:
The Pod continues using the old configuration until restarted. -> Option C
Quick Check:
Env vars from ConfigMap update only after Pod restart [OK]

Quick Trick: Env vars from ConfigMap update only after Pod restart [OK]

Common Mistakes:

Master "ConfigMaps" in Kubernetes

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