[Solved] Consider this pod spec snippet:readinessProbe: tcpSocket: port: 3306 initialDelaySeconds: 10 periodSeconds:... | Kubernetes

Kubernetes - Health Checks and Probes

Consider this pod spec snippet:

readinessProbe:
  tcpSocket:
    port: 3306
  initialDelaySeconds: 10
  periodSeconds: 5

What will Kubernetes do if the container does not accept TCP connections on port 3306 after startup?

ADelete the pod from the cluster

BRestart the container immediately

CIgnore the failure and keep the pod ready

DMark the pod as not ready and stop sending traffic to it

Step-by-Step Solution

Solution:

Step 1: Understand readiness probe behavior
Readiness probes determine if a pod is ready to receive traffic.
Step 2: Effect of TCP readiness probe failure
If the TCP probe fails, Kubernetes marks the pod as not ready and stops routing traffic to it.
Step 3: Difference from liveness probe
Readiness probe failures do not restart the container; that is the liveness probe's role.
Final Answer:
Mark the pod as not ready and stop sending traffic to it -> Option D
Quick Check:
Readiness probe failure affects traffic routing, not container lifecycle [OK]

Quick Trick: Readiness probe failure stops traffic, doesn't restart container [OK]

Common Mistakes:

Master "Health Checks and Probes" in Kubernetes

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