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You configured TLS in your Ingress but HTTPS requests fail with a certificate error. What is the most likely cause?

medium📝 Troubleshoot Q14 of 15
Kubernetes - Ingress
You configured TLS in your Ingress but HTTPS requests fail with a certificate error. What is the most likely cause?
AThe secret referenced in tls section does not contain a valid TLS certificate
BThe backend service is not listening on port 443
CThe Ingress controller does not support TLS termination
DThe Ingress resource is missing the rules section
Step-by-Step Solution
Solution:

  1. Step 1: Check TLS secret validity

    If the secret does not have a valid TLS cert and key, HTTPS will fail with certificate errors.

  2. Step 2: Verify other options

    Backend port or missing rules do not cause cert errors; controller usually supports TLS.

  3. Final Answer:

    The secret referenced in tls section does not contain a valid TLS certificate -> Option A

  4. Quick Check:

    Invalid TLS secret = cert error [OK]
Quick Trick: Check TLS secret contents first for certificate errors [OK]
Common Mistakes:
  • Blaming backend port for TLS cert errors
  • Assuming Ingress controller lacks TLS support
  • Ignoring TLS secret correctness

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