Vagrant For K8's

This vagrant script shall install kubernetes cluster on Linux/Windows using vagrant and Virtualbox.

Dependencies

• Vagrant.require_version >= 2.0.0
• Virtualbox

VirtualBox

Download virtual box for windows from https://www.virtualbox.org/wiki/Downloads follow the onscreen steps to install

Install Vagrant On windows

Download vagrant from https://www.vagrantup.com/downloads.html

after it's installed completely you can test using the command vagrant in command prompt

we dont need to install ansible as ansible would be automatically be installed on the master node and used to manage other nodes

Vagrant File Parameters

Setup these parameters in vagrant file to select no of node and memory and other specifications

• $num_instances = 4 ## Number of Instances Vagrant shall create on your Virtual Box ##

• $instance_name_prefix = "k8s" ## Your VM Names Prefix ##

• $vm_memory = 3500 ## VM Memory ##

• $vm_cpus = 3 ## VM CPU Core to be assigned ##

• $subnet = "172.17.8" ## VM Subnet ##

• $os = "ubuntu" ## VM Operating System ##

• $network_plugin = "flannel" ## Kubernetes Network Plugin

• $etcd_instances = 3 ## Note: etcd instance should not be even number ##

• $kube_node_instances = $num_instances #it would be same as no of instances or you could edit with your number #

K8's installation using vagrant

cd kubernetes-vagrant
vagrant up 

vagrant status 

Connect to VM

vagrant ssh node_name

VM	Role	IP Address	Box
k8s-01	master	172.17.8.101	bento/ubuntu-16.04
k8s-02	node	172.17.8.102	bento/ubuntu-16.04
k8s-0X	node	172.17.8.10X	bento/ubuntu-16.04
mssql-jump	jump-box	172.17.8.201	bento/ubuntu-16.04

Confirm your installation by running a command ( you need to ssh into the master )

 $ kubectl get nodes
 $ kubectl get pods --all-namespaces

Connect to Dashboard

https://172.17.8.101:30910/#!/login

Generate Key

kubectl -n kube-system describe secrets \
`kubectl -n kube-system get secrets | awk '/clusterrole-aggregation-controller/ {print $1}'` \
| awk '/token:/ {print $2}'