Kubernetes on Ubuntu

1-deps.sh

#!/bin/sh

# run this on all nodes

apt-get update && apt-get install -qy docker.io

apt-get update && apt-get install -y apt-transport-https \
&& curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | apt-key add -

echo "deb http://apt.kubernetes.io/ kubernetes-xenial main" > /etc/apt/sources.list.d/kubernetes.list

apt-get update && apt-get install -y kubelet kubeadm kubernetes-cni

# pre-pull images on master so they're ready when we initialize the cluster
# kubeadm config images pull

1-x-deps-version

#!/bin/sh

# run this on all nodes

apt-get update && apt-get install -qy --allow-downgrades docker.io=18.06.1-0ubuntu1.2~16.04.1

apt-get update && apt-get install -y apt-transport-https \
&& curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | apt-key add -

echo "deb http://apt.kubernetes.io/ kubernetes-xenial main" > /etc/apt/sources.list.d/kubernetes.list

apt-get update && apt-get install -y --allow-downgrades kubelet=1.13.0-00 kubeadm=1.13.0-00 kubernetes-cni=0.6.0-00

2-admin-setup.sh

#!/bin/sh

# RUN THIS ON THE ADMIN NODE ONLY

# 10.244.0.0/16 is the flannel subnet
# advertise the correct local IP
sudo kubeadm init --pod-network-cidr=10.244.0.0/16 --apiserver-advertise-address=YOUR_LOCAL_IP_GOES_HERE

# add a user called default, this is required by k8s
sudo useradd default -G sudo -m -s /bin/bash

# replace 'a' with your password
echo "default:a" | chpasswd

3-admin-setup-run-as-default.sh

# use `su - default` to switch to user first
# make sure you can use sudo

# RUN THIS ON THE ADMIN NODE ONLY

mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config

sudo cp /etc/kubernetes/admin.conf $HOME/
sudo chown $(id -u):$(id -g) $HOME/admin.conf
# this variable is read by flannel in a sec
export KUBECONFIG=$HOME/admin.conf
echo "export KUBECONFIG=$HOME/admin.conf" | tee -a ~/.bashrc

# set up network
kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml
kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/k8s-manifests/kube-flannel-rbac.yml

4-finish.sh

# now run this in the shell to get the cluster joining command for the other nodes
kubeadm token create --print-join-command