work on k8s worker.sh

etc/samples-provision/k8s/worker.sh

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+# HW requirements: 1 CPUS 2 RAM
+# OS: Ubuntu focal
+set -x
+
+#should be $(lsb_release -cs) but it appears it is not working on focal yet
+docker_ubuntu_release=bionic
+k8s_version=1.18.0
+
+# Set hostname and disable swap
+sudo hostnamectl set-hostname "$(hostname -I | awk '{print $1}')"
+echo "export PS1=\"\[\e[1;35m\]\u\[\033[m\]@\[\e[1;92m\]$(hostname -I | awk '{print $1}')\[\033[m\]:\w \$ \"" >>~/.bashrc
+
+sudo swapoff -a && sudo sed -i '/ swap / s/^/#/' /etc/fstab
+
+## Fix IP Addr
+sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys CC86BB64
+sudo add-apt-repository ppa:rmescandon/yq -y
+sudo apt-get update -y
+sudo apt-get install yq -y
+sudo yq w -i /etc/netplan/00-installer-config.yaml network.ethernets.enp0s3.dhcp4 false
+sudo yq w -i /etc/netplan/00-installer-config.yaml network.ethernets.enp0s3.addresses[+] "$(hostname -I | awk '{print $1}')/24"
+sudo yq w -i /etc/netplan/00-installer-config.yaml network.ethernets.enp0s3.gateway4 "$(hostname -I | cut -d "." -f 1-3).1"
+sudo yq w -i /etc/netplan/00-installer-config.yaml network.ethernets.enp0s3.nameservers.addresses[+] 8.8.8.8
+sudo yq w -i /etc/netplan/00-installer-config.yaml network.ethernets.enp0s3.nameservers.addresses[+] 8.8.4.4
+sudo netplan apply
+sleep 1
+############# install docker & k8s
+
+## install docker, kubelet, kubeadm and kubectl
+curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
+sudo add-apt-repository \
+  "deb [arch=amd64] https://download.docker.com/linux/ubuntu \
+  $docker_ubuntu_release \
+  stable"
+curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | sudo apt-key add -
+cat <<EOF | sudo tee /etc/apt/sources.list.d/kubernetes.list
+deb https://apt.kubernetes.io/ kubernetes-xenial main
+EOF
+
+sudo apt-get update
+sudo apt-get install -y \
+  containerd.io=1.2.13-1 \
+  docker-ce=5:19.03.8~3-0~ubuntu-$docker_ubuntu_release \
+  docker-ce-cli=5:19.03.8~3-0~ubuntu-$docker_ubuntu_release
+sudo apt-get install -y kubelet=$k8s_version-00 kubeadm=$k8s_version-00 kubectl=$k8s_version-00
+sudo apt-mark hold docker-ce kubelet kubeadm kubectl
+
+echo "net.bridge.bridge-nf-call-iptables=1" | sudo tee -a /etc/sysctl.conf
+sudo sysctl -p
+
+## configure docker
+
+cat <<EOF | sudo tee /etc/docker/daemon.json
+{
+  "exec-opts": ["native.cgroupdriver=systemd"],
+  "log-driver": "json-file",
+  "log-opts": {
+    "max-size": "100m"
+  },
+  "storage-driver": "overlay2"
+}
+EOF
+
+sudo mkdir -p /etc/systemd/system/docker.service.d
+
+sudo systemctl daemon-reload
+sudo systemctl restart docker