https://github.com/hamidgholami/k8s-lab

Kubernetes Labratory
https://github.com/hamidgholami/k8s-lab

cncf devops devops-tools k3s k3s-architecture k3s-cluster k3s-minicluster k8s k8s-cluster k8s-learn kubernetes kubernetes-cluster kubernetes-labs kubernetes-learning sre

Last synced: 6 months ago
JSON representation

Kubernetes Labratory

• Host: GitHub
• URL: https://github.com/hamidgholami/k8s-lab
• Owner: hamidgholami
• License: apache-2.0
• Created: 2021-05-23T08:58:11.000Z (over 4 years ago)
• Default Branch: main
• Last Pushed: 2023-09-22T10:32:59.000Z (about 2 years ago)
• Last Synced: 2025-04-06T16:49:10.218Z (7 months ago)
• Topics: cncf, devops, devops-tools, k3s, k3s-architecture, k3s-cluster, k3s-minicluster, k8s, k8s-cluster, k8s-learn, kubernetes, kubernetes-cluster, kubernetes-labs, kubernetes-learning, sre
• Language: Jinja
• Homepage:
• Size: 45.9 KB
• Stars: 6
• Watchers: 1
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Awesome Lists containing this project

README

          
# Lightweight Kubernetes Labratory

[![Twitter Follow](https://img.shields.io/twitter/follow/045_hamid?label=geekestan&style=plastic&logo=twitter&color=blue)](https://twitter.com/geekestan)

[![GitHub Follow](https://img.shields.io/github/followers/hamidgholami?label=hamidgholami&style=plastic&logo=github&color=green)](https://github.com/hamidgholami)

[![Linkedin Badge](https://img.shields.io/badge/hamid--gholami-LinkedIn-blue?logo=linkedin)](https://www.linkedin.com/in/hamid-gholami/)

[![Youtube Badge](https://img.shields.io/badge/-geekestan-red?style=plastic&&logo=youtube&message=geekestan&logoColor=white)](https://www.youtube.com/@geekestan)

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.

#### Requirement

Make sure that following tools are installed on your host.

1. Ansible

2. Vagrant

3. libvirt/KVM or virtualbox

#### SSH configuration

Add the following configuration in `~/.ssh/config`

```bash

Host 10.0.0.*

        Hostname %h

Host 192.168.56.*                     

        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          

                                               

Match Host 192.168.56.*

        User vagrant                                                                           

        Port 22                                                                                

        UserKnownHostsFile /dev/null                                                           

        StrictHostKeyChecking no

        PasswordAuthentication no                                                              

        IdentityFile $HOME/.vagrant.d/insecure_private_key

        IdentitiesOnly yes                                                                     

        LogLevel FATAL

```

#### How does it work?

Fill the variables in `vagrant_variables.yaml` and then execute the following command:

```bash

vagrant up

```

#### Kubeconfig

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

```

scp vagrant@:~/.kube/config ~/.kube/config

```

#### Changing default storage pool directory

[URL](https://serverfault.com/questions/840519/how-to-change-the-default-storage-pool-from-libvirt)


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

```bash

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

```