- Packer (https://www.packer.io/)
- Vagrant (https://www.vagrantup.com/)
- VirtualBox (https://www.virtualbox.org/wiki/Downloads)
Build a base CentOS7 image and layer Kubernetes on top of it
sh build-all.sh
As part of its action, this script downloads the ISO image for CentOS7. The first time you run it may take 20-30 minutes, depending on your network. This ISO image is cached, so subsequent runs will take significantly less time.
Download a Kubernetes release tarball and extract kubectl from it.
Smoke test the cluster by creating a trivial process in a busybox container, then exec into that container to do an nslookup on the Kubernetes system service.
sh smoketest.sh
When the cluster has settled, you should see this output from the nslookup command the smoketest launches
Every 2.0s: kubectl --kubeconfig=kubernetes-configs/kubeconfig exec busybox nslookup kubernetes
Server: 192.168.0.53
Address 1: 192.168.0.53
Name: kubernetes
Address 1: 192.168.0.1
Cleanup the smoketest busybox container
kubectl --kubeconfig=kubernetes-configs/kubeconfig delete pod busybox
Here is the kubeconfig that lets you interact with this cluster without having to specify options to kubectl. Put this in $HOME/.kube/config:
apiVersion: v1
clusters:
- cluster:
server: http://localhost:8080
name: vbox
contexts:
- context:
cluster: vbox
name: vbox
current-context: vbox
kind: Config
preferences: {}
kubectl cluster-info
Kubernetes master is running at http://localhost:8080
KubeDNS is running at http://localhost:8080/api/v1/proxy/namespaces/kube-system/services/kube-dns