This is a 3-node-cluster Kubernetes that uses k3s. It can be very usefull for learning Kubernetes concepts easy and fast without struggling with installing kubernetes by kubeadm or minikube. Although learning methods of Kubernetes installation is definitely crucial, for first step and for learning vital and basic concepts of Kubernetes we need a lightweight and repeatable infrastructure.

Make sure that following tools are installed on your host.

1. Ansible
2. Vagrant
3. libvirt/KVM or virtualbox

Add the following configuration in ~/.ssh/config

Host 10.0.0.*
        Hostname %h

Match Host 10.0.0.*
        User vagrant
        Port 22
        UserKnownHostsFile /dev/null
        StrictHostKeyChecking no
        PasswordAuthentication no
        IdentityFile $HOME/.vagrant.d/insecure_private_key
        IdentitiesOnly yes
        LogLevel FATAL

Run below commands:

vagrant up --provider libvirt
# OR
vagrant up --provider virtualbox

For executing kubectl from your machine rather than in master node (node-1), copy the kubectl configuration in your machine:

scp [email protected]:~/.kube/config ~/.kube/config

URL
For changing storage pool default path, the following commands can be used:

virsh pool-list
virsh pool-destroy default
virsh pool-undefine default
virsh pool-define-as --name default --type dir --target /hdd/pool_ssd_nvm
virsh pool-autostart default
virsh pool-start default