Install Microk8s on Ubuntu machine

install_microk8s.sh

# Install microk8s from the edge channel (Rancher requires Helm 2.15.1 or above)
sudo snap install microk8s --classic
# Enable useful plugins
sudo microk8s.enable dns dashboard storage ingress helm

# Allow running priviledged Pods (required by Rancher's `cattle-node-agent`)
sudo sh -c 'echo "--allow-privileged=true" >> /var/snap/microk8s/current/args/kube-apiserver'
sudo systemctl restart snap.microk8s.daemon-apiserver.service

# Setup and install Tiller (part of Helm)
sudo microk8s.kubectl create serviceaccount tiller --namespace kube-system
sudo microk8s.kubectl create clusterrolebinding tiller-cluster-rule --clusterrole=cluster-admin --serviceaccount=kube-system:tiller
sudo microk8s.helm init --service-account=tiller

# Install cert-manager user by Rancher
sudo microk8s.helm repo add jetstack https://charts.jetstack.io
sudo microk8s.kubectl apply -f https://github.com/jetstack/cert-manager/releases/latest/download/cert-manager.crds.yaml
sudo microk8s.kubectl create namespace cert-manager
sudo microk8s.kubectl label namespace cert-manager certmanager.k8s.io/disable-validation=true
sudo microk8s.helm install --name cert-manager --namespace cert-manager jetstack/cert-manager

# Install stable Rancher
sudo microk8s.helm repo add rancher-stable https://releases.rancher.com/server-charts/stable
sudo microk8s.helm install rancher-stable/rancher --name rancher --namespace cattle-system  --set replicas=1 --set hostname=${HOSTNAME}

# Alias
sudo snap alias microk8s.kubectl kubectl
sudo snap alias microk8s.helm helm