Kubernetes Cookbook - Second Edition

Getting ready

Since Kubernetes version 1.3, kube-dns has come with Kubernetes and is enabled by default. To check whether kube-dns is working or not, check the kube-system namespace with the following command:

$ kubectl get deploy kube-dns --namespace=kube-systemNAME       DESIRED   CURRENT   UP-TO-DATE   AVAILABLE   AGEkube-dns   1         1         1            1           1d

If you are using minikube, type the following command to see the addon's status:

$ minikube addons list |grep kube-dns- kube-dns: enabled

If it shows as disabled, you need to enable it using the following command:

$ minikube addons enable kube-dns

In addition, prepare two namespaces, chap8-domain1 and chap8-domain2, to demonstrate how kube-dns assigns domain names:

$ kubectl create namespace chap8-domain1namespace ...