hetzner.tf

variable "hcloud_token" {
}

provider "hcloud" {
    token = "${var.hcloud_token}"
}

resource "hcloud_server" "kube-master" {
    name = "kube-master"
    image = "ubuntu-18.04"
    server_type = "cx11"
    ssh_keys = ["${hcloud_ssh_key.default.id}"]

    connection {
        type = "ssh"
        user = "root"
        private_key = "${file("~/.ssh/id_rsa")}"
    }

    provisioner "file" {
        source = "install-k8s.sh"
        destination = "/opt/install-k8s.sh"
    }

    provisioner "remote-exec" {
        inline = [
            "chmod +x /opt/install-k8s.sh",
            "/opt/install-k8s.sh",
        ]
    }
}

resource "hcloud_ssh_key" "default" {
  name = "pubkey"
  public_key = "${file("~/.ssh/id_rsa.pub")}"
}

output "ip" {
    value = "${hcloud_server.kube-master.ipv4_address}"
}

install-k8s.sh

#!/bin/bash

set -e
set -x

VERSION="$(curl -s https://storage.googleapis.com/kubernetes-release/release/stable.txt)"

function _aptUpdate() {
  set +e
  apt-get clean
  apt-get update
  apt-get update
  set -e
}

function prepare() {
  sed -i 's/^\/swapfile/#\/swapfile/' /etc/fstab
  swapoff /swapfile
  # ugly workaround for hetzners image
  rm /var/lib/apt/lists/lock
}

function dockerio() {
  _aptUpdate
  apt-get install -y docker.io
}

function install_kubeadm() {
  # from https://kubernetes.io/docs/setup/independent/install-kubeadm/
  _aptUpdate
  apt-get install -y apt-transport-https curl
  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
  _aptUpdate
  apt-get install -y \
    kubelet=$(apt-cache madison kubelet | grep $VERSION | head -1 | awk '{print $3}') \
    kubeadm=$(apt-cache madison kubeadm | grep $VERSION | head -1 | awk '{print $3}') \
    kubectl=$(apt-cache madison kubectl | grep $VERSION | head -1 | awk '{print $3}')
  apt-mark hold kubelet kubeadm kubectl
}

function init_kubeadm() {
  kubeadm init --pod-network-cidr=192.168.0.0/16
  kubectl --kubeconfig /etc/kubernetes/admin.conf apply -f https://docs.projectcalico.org/v3.1/getting-started/kubernetes/installation/hosted/rbac-kdd.yaml
  kubectl --kubeconfig /etc/kubernetes/admin.conf apply -f https://docs.projectcalico.org/v3.1/getting-started/kubernetes/installation/hosted/kubernetes-datastore/calico-networking/1.7/calico.yaml
  kubectl --kubeconfig /etc/kubernetes/admin.conf taint node kube-master node-role.kubernetes.io/master-
}

prepare
dockerio
install_kubeadm
init_kubeadm