Geexar k8s

A cluster of Raspberry Pis is deployed using Ansible and Kubernetes.

Why

This is a project I always wanted to do, and that's when I came a cross the project made by Jeff Geerling the guy is a legend, he is very active in the community and has a project called Raspberry Pi Dramble.

Based entirely on this Raspberry Pi Dramble project, I created my Brazilian version Raspberry Pi Geexar I forked Jeff's project, removed some things and made it lighter just leaving that you would need for a Kubernetes cluster.

Well that is it if you are interested and want more details doesn't hesitate to open an Issuer or a Pull Request 😉

Official Project Raspberry Pi Dramble

You can browse more information about geerlingguy's Dramble on http://www.pidramble.com. This site is running on the Raspberry Pi Dramble of Jeff cluster!

Specs

• 16+ ARMv7 CPU Cores
• 5.6 GHz combined compute power
• 4 GB RAM
• 128 GB microSD flash-based storage
• 1 Gbps private network with PoE

Getting the Pis (and other accessories)

A basic list of components used in constructing:

• Raspberry Pis and Accessories
• Other Necessities
• Recommended Extras

Setting up the Pis

The process for setting up all the Raspberry Pis is outlined in the Wiki:

1. Prepare the Raspberry Pis for provisioning
2. Rack the Raspberry Pis
3. Network the Raspberry Pis
4. Test the Ansible configuration
5. Provision the Raspberry Pis
6. Deploy Drupal to the Raspberry Pis

Adding more nodes

You can add more than four nodes, if you desire; add additional hosts in the same sequence in the following files:

• setup/networking/inventory
• setup/networking/vars.yml
• inventory

If you need to change the IP subnet (default is 10.0.0.x), make sure to also update hosts.j2 to use the new subnet so hostnames resolve correctly.

Local testing

A Vagrantfile is also included for local testing and debugging of the Kubernetes cluster and manifests using Vagrant. See the Vagrant README for more details.

Initial Setup

Set up Pis networking by assigning a uniform set of IP addresses and hostnames based on Pi MAC addresses. See the Networking README for more details.

Others

Migrate K8s 1.15 to 1.16

https://kubernetes.io/blog/2019/07/18/api-deprecations-in-1-16/

kubectl proxy

http://localhost:8001/api/v1/namespaces/kube-system/services/https:kubernetes-dashboard:/proxy/#!/login

kubectl proxy

kubectl -n kubernetes-dashboard describe secret $(kubectl -n kubernetes-dashboard get secret | grep admin-user | awk '{print $1}')

kubectl -n kube-system describe secret $(kubectl -n kube-system get secret | grep admin-user | awk '{print $1}')