Kubernetes on Vagrant

Use Kubeadm on Vagrant to create a multi-master environment for Kubernetes cluster.

I use 2 master node and 3 worker node. one load balancer node is in front of 2 master node as follow:

	--------------------------------Worker1
	-                                    -                  
	----------------Master1---------------- 
	-                                    -
	LB-----=====>-------------------Worker2
	-                                     -
	----------------Master2---------------- 
	-                                     -
	--------------------------------Worker3

But in Best practice, almost use odd number of master node or worker node. for example 1,3,5,... master or worker node.

Required spec to run this code:

• Hosted Server memory 12G+
• Vagrant >= 2.3
• VirtualBox >= 6.0

Usage

run this command to setup and config multi master cluster: vagrant up

After multi master cluster up nad ready to use, for deploy helm chart in cluster, ssh to master-1 node:

vagrant ssh master-1

Then run this command: helm install api helm-chart

• For zero-downtime deployment or upgrade application in Kubernetes, we can use rolling update deployment strategy.