multipass_install_k8.sh

#!/bin/bash
set -e
source 0__base_include.sh

GREEN='\033[0;32m'
LB='\033[1;34m' # light blue
NC='\033[0m' # No Color

echo "############################################################################"
echo "Now deploying k3s cluster - ${CLUSTER_NAME} on multipass VMs"

echo -e "[${LB}Info${NC}] deploy k3s on $CLUSTER_NAME"
multipass exec ${CLUSTER_NAME}-master -- /bin/bash -c "curl -sfL https://get.k3s.io | CLUSTER_NAME=${CLUSTER_NAME} sh ${K3S_OPTIONS}" | grep Using
# Get the IP of the master node
K3S_NODEIP_MASTER="https://$(multipass info ${CLUSTER_NAME}-master | grep "IPv4" | awk -F' ' '{print $2}'):6443"
# Get the TOKEN from the master node
K3S_TOKEN="$(multipass exec ${CLUSTER_NAME}-master -- /bin/bash -c "sudo cat /var/lib/rancher/k3s/server/node-token")"
# Deploy k3s on the worker nodes node2,node3,node4

WORKERS=$(echo $(multipass list | grep ${CLUSTER_NAME}-worker | awk '{print $1}'))
for WORKER in ${WORKERS};
do echo -e "[${LB}Info${NC}] deploy k3s on ${WORKER}" && multipass exec ${WORKER} -- /bin/bash -c "curl -sfL https://get.k3s.io | K3S_TOKEN=${K3S_TOKEN} K3S_URL=${K3S_NODEIP_MASTER} sh -" | grep -w "Using";
done
sleep 10

echo "############################################################################"
echo exporting KUBECONFIG file from master node
multipass exec ${CLUSTER_NAME}-master -- bash -c 'sudo cat /etc/rancher/k3s/k3s.yaml' > ${CLUSTER_NAME}.yaml
sed -i'.back' -e "s/127.0.0.1/${CLUSTER_NAME}-master/g" ${CLUSTER_NAME}.yaml
export KUBECONFIG=`pwd`/${CLUSTER_NAME}.yaml && echo -e "[${LB}Info${NC}] setting KUBECONFIG=${KUBECONFIG}"

echo -e "[${LB}Info${NC}] tainting master node: ${CLUSTER_NAME}-master"


# download latest kubectl to /usr/local/bin?
#curl -LO "https://dl.k8s.io/release/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/darwin/arm64/kubectl"
#chmod 755 kubectl
#sudo mv kubectl /usr/local/bin

kubectl taint node ${CLUSTER_NAME}-master node-role.kubernetes.io/master=effect:NoSchedule

for WORKER in ${WORKERS}; do kubectl label node ${WORKER} node-role.kubernetes.io/node=  > /dev/null && echo -e "[${LB}Info${NC}] label ${WORKER} with node"; done

kubectl get nodes

echo "are the nodes ready?"
echo "if you face problems, please open an issue on github"
echo -e "[${GREEN}FINISHED${NC}]"
echo "############################################################################"
export KUBECONFIG=${CLUSTER_NAME}.yaml