kubernetes-the-hard-way/docs/10-dns.md

DNS in Kubernetes

Again, it is very interesting to access the service by ip but we know that we can access it by service name Lets try,

kubectl exec busy-box -- wget -O - nginx-service

and nothing happen

the reason is DNS server which we still not configured

but dns server we can install from kubernetes directly

kubectl apply -f https://storage.googleapis.com/kubernetes-the-hard-way/coredns-1.8.yaml

and try to erpeat

kubectl exec busy-box -- wget -O - nginx-service

Output:

Hello from pod: nginx-deployment-68b9c94586-zh9vn
Connecting to nginx-service (10.32.0.230:80)
writing to stdout
-                    100% |********************************|    50  0:00:00 ETA
written to stdout

great, everything works as expected