Setup a single node Kubernetes cluster for development using kubeadm

README.md

kubeadm cloudinit

Setup a single node Kubernetes cluster for development using kubeadm: https://kubernetes.io/docs/setup/independent/install-kubeadm/

Create a CentOS 7 or Ubuntu Xenial (16.04) machine, and run kubeadm.sh as root.

You can pass this script as user-data to cloud-init so that it will be automatically run. For example, on openstack:

openstack server create NAME --flavor FLAVOR --key-name KEY --image 'Ubuntu Xenial' --network NET --security-group SECGROUP --user-data kubeadm.sh

openstack server add floating ip VM-NAME 1.2.3.4

Follow /var/log/cloud-init-output.log to see the progress of the script

kubeadm.sh

#!/bin/bash

set -x

if [ -f /etc/debian_version ]; then
    apt-get update
    apt-get upgrade -y
    apt-get install -y apt-transport-https docker.io

    curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | apt-key add -
    cat <<EOF >/etc/apt/sources.list.d/kubernetes.list
deb http://apt.kubernetes.io/ kubernetes-xenial main
EOF

    apt-get update
    apt-get install -y kubelet kubeadm kubectl
fi

if [ -f /etc/redhat-release ]; then
    yum upgrade -y
    yum install -y docker
    systemctl enable docker
    systemctl start docker

    cat <<EOF >  /etc/sysctl.d/k8s.conf
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
EOF
    sysctl --system

    cat <<EOF > /etc/yum.repos.d/kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=https://packages.cloud.google.com/yum/repos/kubernetes-el7-x86_64
enabled=1
gpgcheck=1
repo_gpgcheck=1
gpgkey=https://packages.cloud.google.com/yum/doc/yum-key.gpg https://packages.cloud.google.com/yum/doc/rpm-package-key.gpg
EOF

    setenforce 0
    yum install -y kubelet kubeadm kubectl
    systemctl enable kubelet
    systemctl start kubelet
fi

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

kubectl --kubeconfig=/etc/kubernetes/admin.conf apply -f https://raw.githubusercontent.com/coreos/flannel/v0.9.1/Documentation/kube-flannel.yml

kubectl --kubeconfig=/etc/kubernetes/admin.conf taint nodes --all node-role.kubernetes.io/master-kubectl taint nodes --all node-role.kubernetes.io/master-

install -o 1000 -d /home/$(id -nu 1000)/.kube
install -o 1000 /etc/kubernetes/admin.conf /home/$(id -nu 1000)/.kube/config

So I might be mistaken but if the script is run as root then:
install -o 1000 -d /home/$(id -nu 1000)/.kube
install -o 1000 /etc/kubernetes/admin.conf /home/$(id -nu 1000)/.kube/config

Would just be installed as root for users with sudo or root access?

Couldn't this be generalize for all users by adding the kubectl config file to the skel files to be setup for all users on the system?