k8s-the-harder-way

Important

Works only for macOS/ARM64

This repo is only for my personal use. I want to understand how Kubernetes works behind the hood by following the Kubernetes The Harder Way

Where I have stopped

I have stopped at the Installing Kubernetes Control Plane section.

Utils

Setup commands

An abstract numeric ID is assigned to VMs. This ID will come in handy in scripts when we want to differentiate between the VMs:

gateway has ID 0
control nodes have IDs 1 through 3
worker nodes have IDs 4 through 6

Setup the vm

 for vmid in $(seq 0 6); do
   ./vmsetup.sh $vmid
 done

Setup vm SSH
```
 ./vmssh.sh $vmid
```

Run a VM

sudo qemu-system-aarch64 \
  -nographic \
  -machine virt,accel=hvf,highmem=on \
  -cpu host \
  -smp 2 \
  -m 2G \
  -bios /opt/homebrew/share/qemu/edk2-aarch64-code.fd \
  -nic vmnet-shared,start-address=192.168.1.1,end-address=192.168.1.20,subnet-mask=255.255.255.0,mac=52:52:52:00:00:00 \
  -hda gateway/disk.img \
  -drive file=gateway/cidata.iso,driver=raw,if=virtio

Launch VMs

sudo ./vmlaunchall.sh kubenet-qemu
sudo tmux attach -t kubenet-qemu
sudo tmux kill-session -t kubenet-qemu
./vmsshall.sh kubenet-ssh

QEMU utils

Ctrl+Opt+2 => Switch to serial port
Ctrl+Opt+3 => Switch to parallel port
Ctrl+Opt+2 => Switch to monitor console
Ctrl+Opt+G => release mouse

`tmux`

https://tmuxcheatsheet.com/

Certificates

Note

Run those commands in the auth directory

Generating certs & kubeconfigs: ./genauth.sh
Generating cluster data encryption key: ./genenckey.sh
Distributing certificates and keys: ./deployauth.sh
Setting up local kubeconfig: ./setuplocalkubeconfig.sh

burahimu/k8s-the-harder-way