[Solved] After applying a DaemonSet manifest, no pods appear on any nodes. What is the most probable cause? — Ans: The DaemonSet's selector does not match the pod template labels | Kubernetes

Kubernetes - Scheduling

After applying a DaemonSet manifest, no pods appear on any nodes. What is the most probable cause?

AThe DaemonSet's selector does not match the pod template labels

BThe cluster has no nodes available

CThe DaemonSet is missing a container image

DThe DaemonSet is configured with replicas set to zero

Step-by-Step Solution

Solution:

Step 1: Check DaemonSet selector and pod labels
DaemonSet selector must match pod template labels exactly.
Step 2: Understand impact
If selector and labels mismatch, pods won't be created.
Step 3: Evaluate other options
Cluster nodes exist; replicas field is not used in DaemonSet; missing image causes pod crash, not absence.
Final Answer:
The DaemonSet's selector does not match the pod template labels -> Option A
Quick Check:
Selector-label mismatch prevents pod creation [OK]

Quick Trick: Selector must match pod labels exactly [OK]

Common Mistakes:

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After applying a DaemonSet manifest, no pods appear on any nodes. What is the most probable cause?