Kubernetes - Health Checks and Probes
Given this readiness probe config, what happens if the probe fails repeatedly?
readinessProbe:
httpGet:
path: /ready
port: 8080
failureThreshold: 3
periodSeconds: 5
Given this readiness probe config, what happens if the probe fails repeatedly? readinessProbe: httpGet: path: /ready port: 8080 failureThreshold: 3 periodSeconds: 5
medium📝 Predict Output Q4 of 15
Step-by-Step Solution
Solution:
Step 1: Understand failureThreshold and periodSeconds
FailureThreshold 3 means after 3 failed checks spaced by periodSeconds (5s), action triggers.Step 2: Effect of readiness probe failure
Pod is marked NotReady and removed from service endpoints, but not restarted or deleted.Final Answer:
Pod is removed from service endpoints after 3 failures -> Option AQuick Check:
Readiness failure removes pod from traffic [OK]
Quick Trick: FailureThreshold controls removal from service, not restart [OK]
Common Mistakes:
- Thinking pod restarts on readiness failure
- Assuming pod deletion on readiness failure
- Ignoring failureThreshold effect
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