Kubernetes Service Not Resolving with ExternalName Type Despite Correct Configuration
Quick question that's been bugging me - I'm working with an scenario with a Kubernetes Service of type `ExternalName`. Despite correctly configuring the service to point to an external database, I am unable to resolve the service name in my pods. Here’s how I defined my service: ```yaml apiVersion: v1 kind: Service metadata: name: my-external-database spec: type: ExternalName externalName: db.example.com ``` When I try to ping the service from within my pod like this: ```bash kubectl exec -it my-pod -- ping my-external-database ``` I get the following behavior: ``` ping: my-external-database: Name or service not known ``` I've checked the DNS configuration and it seems to be functioning correctly, as I can resolve other internal services. My cluster is running on Kubernetes version 1.23. I also verified that the external service is reachable from outside the cluster by using curl on my local machine: ```bash curl db.example.com ``` This returns the expected response from the database. I've also confirmed that there are no network policies in place that could be blocking this traffic. I suspect it could be an scenario with how the ExternalName service is set up or if there are some caching layers complicating the DNS resolution within the pods. I've restarted the kube-dns pods and waited for a while, but that didn’t help either. Any insights on what might be going wrong here or suggestions on what else I should check? This is part of a larger web app I'm building. Am I missing something obvious?