kubernetes dns resolution test

gistfile1.txt

working nslookup task


#### test.yaml ####

---
apiVersion: v1
kind: Service
metadata:
  name: mywebserver
spec:
  selector:
    app: nginx
  ports:
  - port: 80
    name: whateve
  type: ClusterIP

---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx
spec:
  replicas: 2
  strategy:
    type: RollingUpdate
    rollingUpdate:
      maxSurge: 2
      maxUnavailable: 1
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      name: nginx
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx

---
apiVersion: v1
kind: Pod
metadata:
  name: busybox2
  namespace: default
spec:
  containers:
  - name: busy
    image: busybox
    command:
      - sleep
      - "3600" 


#### cmd ####

$ kubectl exec -ti busybox2 -- nslookup mywebserver
Server:		10.96.0.10
Address:	10.96.0.10:53

Name:	mywebserver.default.svc.cluster.local
Address: 10.101.105.151

*** Can't find mywebserver.svc.cluster.local: No answer
*** Can't find mywebserver.cluster.local: No answer
*** Can't find mywebserver.default.svc.cluster.local: No answer
*** Can't find mywebserver.svc.cluster.local: No answer
*** Can't find mywebserver.cluster.local: No answer