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Why might host-based routing fail even if the Ingress YAML is correct?

medium📝 Troubleshoot Q7 of 15
Kubernetes - Ingress
Why might host-based routing fail even if the Ingress YAML is correct?
AIngress controller is not installed or not running
BService ports are set to zero
CPod labels do not match service selectors
DNode IP addresses are not reachable
Step-by-Step Solution
Solution:

  1. Step 1: Identify dependency on Ingress controller

    Host-based routing requires a running Ingress controller to process rules.

  2. Step 2: Evaluate other options

    Service ports zero or pod label mismatch affect service but not routing rules; node IP issues affect cluster networking, not routing logic.

  3. Final Answer:

    Ingress controller is not installed or not running -> Option A

  4. Quick Check:

    Ingress controller must run for routing [OK]
Quick Trick: Ingress controller must be active for routing to work [OK]
Common Mistakes:
  • Ignoring the need for an Ingress controller
  • Blaming service port or pod labels for routing failure
  • Confusing node IP reachability with routing

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