based on Kubernetes Setup Using Ansible and Vagrant

Install vagrant & vagrant-vbguest plugin

brew install vagrant
vagrant plugin install vagrant-vbguest

Install ansible on a virtual environment

# create a python virtual environment
python3 -m venv ~/.venv-ansible
# activate environment
source ~/.venv-ansible/bin/activate
# install ansible
pip install ansible
# deactivate environment
deactivate

Starts and provisions the vagrant environment

# activate environment
source ~/.venv-ansible/bin/activate
vagrant up

Access to the servers

## Accessing master
vagrant ssh k8s-master
vagrant@k8s-master:~$ kubectl get nodes
NAME         STATUS   ROLES                  AGE   VERSION
k8s-master   Ready    control-plane,master   20h   v1.21.5
node-1       Ready    <none>                 19h   v1.21.5
node-2       Ready    <none>                 19h   v1.21.5


## Accessing nodes
vagrant ssh node-1
vagrant ssh node-2

additional vagrant commands

resume          resume a suspended vagrant machine
suspend         suspends the machine
status          outputs status of the vagrant machine

• Graphical vi-vim Cheat Sheet and Tutorial
• JSON PATH Quiz- FREE COURSE
• Certified Kubernetes Administrator (CKA) with Practice Tests
• kubectl Cheat Sheet
• Training and Certification
• !!! Linux Foundation Kubernetes Certifications Now Include Exam Simulator
  • Announcement
  • CKA Simulator
• Important Instructions: CKA and CKAD
  • The CKA & CKAD environments are currently running Kubernetes v1.21.
• Platform Selection
  • for CKA the Platform Option Available is Ubuntu 18.04
• calico requirements

Both the container runtime and the kubelet have a property called "cgroup driver", which is important for the management of cgroups on Linux machines.

Warning: Matching the container runtime and kubelet cgroup drivers is required or otherwise the kubelet process will fail.

See Configuring a cgroup driver for more details.

here the info to setup a cgroup driver for docker

• Running Ansible Manually

  # run master-playbook.yml
  ansible-playbook --private-key=~/.vagrant.d/insecure_private_key --extra-vars "node_ip=192.168.50.10" -u vagrant -i .vagrant/provisioners/ansible/inventory/vagrant_ansible_inventory kubernetes-setup/master-playbook.yml
  # run unly join-command
  ansible-playbook --private-key=~/.vagrant.d/insecure_private_key --extra-vars "node_ip=192.168.50.10" -u vagrant -i .vagrant/provisioners/ansible/inventory/vagrant_ansible_inventory kubernetes-setup/master-playbook.yml --tags "join-command"

• troubleshoot kubelet

  If you are on a systemd-powered system, you can try to troubleshoot the error with the following commands:
  - 'systemctl status kubelet'
  - 'journalctl -xeu kubelet'

• Troubleshooting kubeadm