k8s cluster script

It is a demo how to quickly setup a k8s cluster (2 nodes) for testing and education purpose.

pirvate network 10.100.0.0/24
10.100.0.15 k8s-master
10.100.0.16 k8s-node1

tool set

• Vagrant v2.0.1 x64 on win7
• Virtulbox v5.1.30 x64 on win7
• portable msys64 on win7 portabledevops

it also works for Linux and OS X.

bring up k8s cluster with vagrant

$ cd ~/vagrant/k8s
$ curl -LO https://raw.githubusercontent.com/robertluwang/docker-hands-on-guide/master/k8s-cluster-vagrant/Vagrantfile
$ vagrant up
$ vagrant status

k8s master setup

It includes calico network addon installation.

$ vagrant ssh k8s-master
$ curl -LO https://raw.githubusercontent.com/robertluwang/docker-hands-on-guide/master/k8s-cluster-vagrant/k8s-master.sh
$ chmod +x k8s-master.sh
$ bash ./k8s-master.sh
or in debug
$ bash -x ./k8s-master.sh

take note for token line from kubeadm init, will run on k8s-node1 later.

kubeadm join --token 8f2887.40b2166d13f9e298 10.100.0.15:6443 --discovery-token-ca-cert-hash sha256:4d7e234e8c9d3378c5ccf47f1a228eac5aad98e657af6538e2eecc261f022579

k8s node setup

$ vagrant ssh k8s-node1
$ curl -LO https://raw.githubusercontent.com/robertluwang/docker-hands-on-guide/master/k8s-cluster-vagrant/k8s-node.sh
$ chmod +x k8s-node.sh
$ bash ./k8s-node.sh
or in debug
$ bash -x ./k8s-node.sh

then manually run join command (from k8s-master) as root,

$ sudo kubeadm join --token 8f2887.40b2166d13f9e298 10.100.0.15:6443 --discovery-token-ca-cert-hash sha256:4d7e234e8c9d3378c5ccf47f1a228eac5aad98e657af6538e2eecc261f022579

verify k8s cluster

on k8s-master

$ kubectl get nodes

will see both nodes running.

vagrant@k8s-master:~$ kubectl get nodes
NAME STATUS ROLES AGE VERSION
k8s-master Ready master 9m v1.8.0
k8s-node1 Ready 1m v1.8.0