Kubernetes Lab

Single run Kubernetes deployment with Vagrant. I use this script to setup test Kubernetes cluster for my CKA exam prepartion:

upgrade cluster version with kubeadm (default version is 1.22.0-00
backup etcd
join cluster nodes (kubeadm token create --print-join-command)
create Kubernetes resources
etc.

Prerequisites

Tools required to apply this deployemnt:

Ansible
Vagrant
Vritualbox

Installation

Clone repository and change working directory

git clone git@github.com:maggnus/kube_lab.git
cd kube_lab

Bootstrap Kubernetes with Vagrant scripts
```
vagrant up
```

vagrant ssh kube-master01
sudo kubectl get nodes,pods,svc -A

VM Settings

etc/config.yml

---
box_name: "ubuntu/hirsute64"

providers:
  # VirtualBox
  virtualbox:
    enable: true

servers:
  - name: "kube-master01"
    cpu: 2
    ram: 4096
    ip: 192.168.56.11
    role: "master"

  - name: "kube-node01"
    cpu: 2
    ram: 2048
    ip: 192.168.56.21
    role: "node"

Cluster settings

ansible/roles/kubernetes/defaults/main.yml

# Kubernetes version
kube_version: 1.22.0-00

kube_master_host: "{{ groups['master'][0] }}"
kube_master_ip: "{{ hostvars[kube_master_host].instance_ip }}"

kube_apiserver_ip: "{{ kube_master_ip }}"
kube_apiserver_dns: "{{ kube_master_host }}"
kube_apiserver_port: 6443
kube_kubelet_port: 10250

# Docker config
docker_config:
  exec-opts:
    - native.cgroupdriver=systemd

Ansible deployment

Ansible script could be run independently without Vagrant provisioning

cd ansible
./ansible-local.sh playbook.yaml