network-policy-dns-debugger

name	network-policy-dns-debugger
description	Investigate Kubernetes service connectivity, DNS lookup, ingress routing, and NetworkPolicy problems.

Network Policy and DNS Debugger

Use this skill when pods cannot connect to services, ingress routes fail, or DNS lookups appear broken.

Workflow

1. Identify source pod, destination Service, namespace, port, and protocol.
2. List Services, Endpoints or EndpointSlices, Ingresses, HTTPRoutes, and NetworkPolicies in the relevant namespaces.
3. Describe the source pod and destination Service.
4. Check whether the Service selector matches ready pods.
5. Check NetworkPolicies that select the source or destination pod.
6. Check recent events for failed ingress or gateway reconciliation.

Output

Return:

• Source and destination path
• DNS name or Service being tested
• Endpoint readiness
• NetworkPolicy or routing constraint found
• Minimal manifest change needed to restore connectivity