Vagrant to setup kubernetes cluster

vagrant file to build a kubernets cluster which consists of 1 master and 3 nodes. You don't have to create complicated ca files and dont't have to do a lot of configuration

Why don't do that with kubeadm

Because I want to setup the etcd, apiserver, controller, scheduler without docker container

Architecutre

Cluster network

The default setting will create the private network from 172.17.8.101 to 172.17.8.103 for nodes, and it will use the host's dhcp for the public ip

The kubenetes service's vip range is 10.254.0.0/16

The container network range is 170.30.0.0/30 owned by flanneld with GW mode

Usage

Prerequisite

Host server with 8G+ mem(More is better), 60G disk, 8 core cpu at lease
vagrant 2.0+
virtualbox 5.0+
Maybe need to access the internet through GFW to download the kubernetes files

Support Addon

CoreDNS
Dashboard with service VIP

Need to modify Vagrantfile as need

You may need to change below line in Vagrantfile according to your host network

node.vm.network "public_network", bridge: "en1: Wi-Fi (AirPort)", auto_config: false

Setup

git clone https://github.com/duffqiu/centos-vagrant.git

cd centos-vagrant

vagrant up

Connect to kubernetes

via Host (Recommended) You must install kubectl in your mac host first.

mkdir -P ~/.kube
cd centos-vagrant
cp .kube/config ~/.kube/config
kubectl get nodes

via VM

vagrant ssh node1
sudo su
kubectl get nodes

Access dashboard without login

show the dashboard address

kubectl cluster-info

and then access dashboard via https from host

Rebuild the cluster

vagrant destroy
rm -rf .vagrant/

Note

Don't use it in production environment

Reference

Kubernetes Handbook