vagrant-k8s

Tested on mac(catalina/big sur)

Pre-installed solutions

• Virtualbox : https://www.virtualbox.org
• Vagrant : https://www.vagrantup.com

Add Virtualbox Network for Vagrant

Menu > Host Network Manager > Create

• IPv4 Address (sample) : 192.168.60.1
• IPv4 Network Mask : 255.255.255.0

vagrantfile variables

IMAGE_NAME = "bento/ubuntu-20.04"

K8S_MINOR_VERSION = "21"
NETWORK_SUB = "192.168.60."
START_IP = 130
POD_CIDR = "10.#{K8S_MINOR_VERSION}.0.0/16"

cluster = {
  "master" => { :cpus => 2, :mem => 2048 },
  "node" => { :cpus => 1, :mem => 1024 }
}

NODE_COUNT = 1

VM_GROUP_NAME = "k8s-1.#{K8S_MINOR_VERSION}"
DOCKER_VER = "5:20.10.12~3-0~ubuntu-focal"
KUBE_VER = "1.#{K8S_MINOR_VERSION}.8-00"

Vagrant.configure("2") do |config|
  config.vm.box = IMAGE_NAME
  ...

Variable name	value
IMAGE_NAME	base image name from vagrant cloud
K8S_MINOR_VERSION	kubernetes minor version number
NETWORK_SUB	Virtual box network ip
START_IP	divided each k8s cluster by start ip number
POD_CIDR	using in kubeadm init; --pod-network-cidr
cluster={}	cluster resource define
NODE_COUNT	worker node count
VM_GROUP_NAME	Virtual box vm group name
DOCKER_VER	docker version define
KUBE_VER	kube* package version

RUN example

~/vagrant-k8s/1.23> vagrant up

Check kubeconfig

~/vagrant-k8s/1.23> kubectl --kubeconfig=./.kube/config get nodes
NAME     STATUS   ROLES                  AGE   VERSION
master   Ready    control-plane,master   68m   v1.23.1
node-1   Ready    <none>                 63m   v1.23.1
node-2   Ready    <none>                 59m   v1.23.1
node-3   Ready    <none>                 54m   v1.23.1

Ubuntu check package versions

#apt-cache policy <packagename>
apt-cache policy kubelet | grep 1.2
  Candidate: 1.23.1-00
     1.23.1-00 500
     1.23.0-00 500
     1.22.5-00 500
     1.22.4-00 500
     1.22.3-00 500
     1.22.2-00 500
     1.22.1-00 500
     1.22.0-00 500
     1.21.8-00 500
     1.21.7-00 500
     ...