Kubernetes - Networking
A CoreDNS pod is crashing with an error about an invalid plugin in the Corefile. What should you check first?
A CoreDNS pod is crashing with an error about an invalid plugin in the Corefile. What should you check first?
medium📝 Troubleshoot Q7 of 15
Step-by-Step Solution
Solution:
Step 1: Analyze error message about invalid plugin
An invalid plugin error means CoreDNS ConfigMap Corefile has syntax or unknown plugin names.Step 2: Verify Corefile correctness
Check the Corefile in the ConfigMap for typos or unsupported plugins causing the crash.Final Answer:
Corefile syntax and plugin names in the ConfigMap -> Option BQuick Check:
Invalid plugin error = check Corefile syntax [OK]
Quick Trick: Check Corefile syntax for invalid plugins first [OK]
Common Mistakes:
- Checking unrelated pod resource limits first
- Assuming network policies cause plugin errors
- Blaming permissions without checking config
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