RaspberryPi Clustering Setup part2

Ssh Configuration

For controller (raspberypi)

## ssh key generation for ssh without login
$ ssh-keygen

## copy key to workers
$ ssh-copy-id root@192.168.1.51
$ ssh-copy-id root@192.168.1.52
$ ssh-copy-id root@192.168.1.53
$ ssh-copy-id root@192.168.1.54

## pssh (parallel-ssh) install
$ sudo apt update
$ sudo apt install pssh

## make hosts.txt file
$ echo "192.168.1.51" | tee -a hosts.txt
$ echo "192.168.1.52" | tee -a hosts.txt
$ echo "192.168.1.53" | tee -a hosts.txt
$ echo "192.168.1.54" | tee -a hosts.txt

## parallel ssh to all workers
$ parallel-ssh -h hosts.txt -i -l root 'echo "hello"'

 

NFS Configuration

For controller (raspberypi; nfs-server)

## mount SSD
$ echo "UUID=xxxxxxxx-xxxx-xxxx-xxxxxxxxxxxx /mnt/SSD ext4 defaults,nofail 0 2" | sudo tee -a /etc/fstab
$ mount -a

## install nfs server
$ sudo apt update
$ sudo apt install nfs-kernel-server

## nfs configuration @ /etc/exports
$ echo "/mnt/SSD 192.168.1.0/24(rw,sync,no_subtree_check)" | sudo tee -a /etc/exports

## restart nfs server
$ sudo systemctl restart nfs-kernel-server

For worker (Odroid 1,2,3,4; nfs-client)

## install nfs client
$ sudo apt update
$ sudo apt install nfs-common

## mount nfs
$ sudo mkdir -p /mnt/SSD
$ echo "192.168.1.1:/mnt/SSD /mnt/SSD nfs defaults,noatime,x-systemd.automount 0 0" | sudo tee -a /etc/fstab
$ mount -a

Kubernates Configuration

k0s installation

For controller (raspberrypi)

## install k0s
$ curl -sSLf https://get.k0s.sh | sudo sh

## check dependencies
$ sudo k0s sysinfo

 

In case of dependency check failure, modify boot command (/boot/firmware/cmdline.txt for raspberrypi4)

console=serial0,115200 console=tty1 ... cgroup_enable=memory

 

## make configuration
$ sudo k0s config create | sudo tee /etc/k0s/k0s.yaml

## if needed modify the configuration

## install controller
$ sudo k0s install controller -c /etc/k0s/k0s.yaml
$ sudo k0s start

## create token for workers
$ sudo k0s token create --role=worker | sudo tee /mnt/SSD/k0s_worker_token

 

For worker (Odroid 1,2,3,4)

## install k0s
$ curl -sSLf https://get.k0s.sh | sudo sh

## check dependencies
$ sudo k0s sysinfo

 

In case of dependency check failure, modify boot command (/media/boot/boot.ini for Odroid c4)

setenv bootargs "root=UUID=... systemd.unified_cgroup_hierarchy=0"

 

## install worker with token
$ sudo k0s install worker --token-file /mnt/SSD/k0s_worker_token
$ sudo k0s start

## check
$ sudo systemctl status k0sworker

 

 

k0s kubernates control

## get nodes
$ sudo k0s kubectl get nodes