# kubernetes on debian
installPackages() {
echo "
Package: docker-ce
Pin: version 17.03.*
Pin-Priority: 1000
" > /etc/apt/preferences.d/docker-ce
apt-get update
apt-get install -y apt-transport-https ca-certificates curl software-properties-common
curl -fsSL https://download.docker.com/linux/debian/gpg | apt-key add -
add-apt-repository "deb https://download.docker.com/linux/$(. /etc/os-release; echo "$ID") \
$(lsb_release -cs) \
stable"
echo "deb http://deb.debian.org/debian/ unstable main" > /etc/apt/sources.list.d/unstable-wireguard.list
printf 'Package: *\nPin: release a=unstable\nPin-Priority: 150\n' > /etc/apt/preferences.d/limit-unstable
curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | apt-key add -
cat <<EOF >/etc/apt/sources.list.d/kubernetes.list
deb http://apt.kubernetes.io/ kubernetes-xenial main
EOF
apt-get update
apt-get install -y linux-headers-$(uname -r) wireguard docker-ce kubelet kubeadm kubectl

mkdir -p /etc/systemd/system/kubelet.service.d
cat > /etc/systemd/system/kubelet.service.d/20-hcloud.conf << EOM
[Service]
Environment="KUBELET_EXTRA_ARGS=--cloud-provider=external"
EOM
systemctl daemon-reload
}

S=$(type -p kubeadm > /dev/null &> /dev/null; echo $?)
while [ ${S} = 1 ]; do
    echo "installing packages..."
    installPackages
    S=$(type -p kubeadm > /dev/null &> /dev/null; echo $?)
done;