Install Kubernetes on an OrangePI clusters

This repo is used to install Kubernetes on an OrangePI PC2 cluster. The boards are running Armbian.

Download image from:

https://dl.armbian.com/orangepipc2/Ubuntu_xenial_next.7z

Step 1: Prepare system

Login as root:

Initit script will:

• Ask you to change root password
• Ask you to create a user: pi
• Set hostname: hostnamectl set-hostname yourHostName

sudo usermod -aG sudo pi
echo "pi ALL=(ALL) NOPASSWD: ALL" | sudo tee /etc/sudoers.d/pi
sudo chmod 0440 /etc/sudoers.d/pi
sudo reboot

Login as pi:

mkdir -p /home/pi/.ssh
curl https://github.com/ewoutp.keys > /home/pi/.ssh/authorized_keys
chmod -R og-rwx /home/pi/.ssh

sudo apt-get update
sudo apt-get upgrade
sudo apt-get install -y overlayroot
sudo systemctl disable zram-config.service

Step 2: Install USB data disk

(
echo t  # Set type
echo 83 # Type linux
echo w  # Write & exit
) | sudo fdisk /dev/sda
sudo mkfs.ext4 -F /dev/sda1
sudo mkdir -p /mnt/data
echo "UUID=$(sudo blkid /dev/sda1 -s UUID -o value) /mnt/data ext4 defaults,noatime,nodiratime 0"  | sudo tee -a /etc/fstab
sudo mount -a
function moveToBind {
    src=$1
    dst=$2
    [ -d $src ] || sudo mkdir -p $src
    sudo mkdir -p $(dirname $dst)
    sudo mv $src $dst
    sudo mkdir -p $src
    sudo mount -o bind $dst $src
    echo "${dst} ${src} none bind 0 0" | sudo tee -a /etc/fstab
}
moveToBind /var/log /mnt/data/var/log
moveToBind /var/lib/docker /mnt/data/var/lib/docker
moveToBind /var/lib/etcd /mnt/data/var/lib/etcd

Step 3: Install docker

Clone this repo and cd into it.

./setup_docker.sh

Step 4: Install Kubernetes tools

./setup_kubernetes_tools

Step 5: Create Kubernetes cluster

on master:

sudo kubeadm init --pod-network-cidr=10.244.0.0/16

Step 6: Freeze filesystem

echo 'overlayroot="tmpfs:recurse=0"' | sudo tee /etc/overlayroot.conf
sudo reboot