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LAB-09. DNS 클러스터 추가 기능 배포

Deploy kube-dns to the cluster.

kube-dns를 클러스터에 배포

kubectl create -f https://storage.googleapis.com/kubernetes-the-hard-way/kube-dns.yaml

확인

kubectl get pods -l k8s-app=kube-dns -n kube-system

출력(예)

NAME                        READY     STATUS    RESTARTS   AGE
kube-dns-598d7bf7d4-spbmj   3/3       Running   0          36s

DNS 테스트

kubectl run nginx --image=nginx
kubectl expose deployment nginx --port 80

서비스 목록 조회

kubectl get svc

테스트용 busybox 파드 실행

kubectl run busybox2 --image=busybox:1.28 --command -- sleep 3600
POD_NAME2=$(kubectl get pods -l run=busybox2 -o jsonpath="{.items[0].metadata.name}")

DNS 작동 확인

kubectl exec $POD_NAME2 -- nslookup nginx
Server:    10.32.0.10
Address 1: 10.32.0.10 kube-dns.kube-system.svc.cluster.local

Name:      nginx
Address 1: 10.32.0.248 nginx.default.svc.cluster.local