k8s-playbook

Minimal ansible playbook for setting up kubeadm based multi node k8s cluster using VirtualBox VMs as nodes.

Meant For

Strictly local use for doing POCs or Learning how to setup a multi node k8s cluster from scratch, Not meant for prod use. Good for doing spikes / testing upgrades of k8s from one version to another.

Features

• VagrantFile to setup desired number of networked VirtualBox VMs.
• Easily configurable resource allocation for master and worker nodes.
• Extensible to add multiple worker nodes if you have the hardware capacity. ( default 1 )
• It takes just two commands. ¯\_(ツ)_/¯

Pre-requisites

• Vagrant, VirtualBox and Ansible Installed on Host.
• Internet connectivity for installation and downloading vagrant basebox ( 1.3 GB ). Not an offline k8s setup

How to use

Ensure Pre-requisites are met. Then from root of repo.

1. vagrant up

Once vagrant has finished setting up the vms. Add your host ssh public key as authorised keys in all VM nodes. ( required for ansible to ssh )

2. ansible-playbook -i inventory.ini site.yml

Once Ansible play is finished. You will find kubectl on master node to manage the cluster.

Planned Features

• Moving etcd out to a separate node.
• Setup multi master cluster.