This script will create a configurable amount of instances using multipass, install k3s server (no HA yet), and add the agent instances to the cluster.

• multipass (See multipass: Getting it)

This is tested on MacOS, Ubuntu Linux 16.04 and 18.04 and Windows 10.

Clone this repo, and run the script:

bash multipass-k3s.sh

This will (defaults):

• Generate random name for your cluster (configurable using NAME)
• Create cloud-init file for server to install k3s server.
• Create one instance for server with 2 CPU (SERVER_CPU_MACHINE), 10G disk (SERVER_DISK_MACHINE) and 1G of memory (SERVER_MEMORY_MACHINE) using Ubuntu bionic (IMAGE)
• Create cloud-init file for agent to join the cluster.
• Create one machine (configurable using AGENT_COUNT_MACHINE) with 1 CPU (AGENT_CPU_MACHINE), 3G disk (AGENT_DISK_MACHINE) and 512M of memory (AGENT_MEMORY_MACHINE) using Ubuntu bionic (IMAGE)
• Wait for the nodes to be joined to the cluster

sudo snap install multipass --classic
wget https://raw.githubusercontent.com/superseb/multipass-k3s/master/multipass-k3s.sh
bash multipass-k3s.sh
curl -Lo /usr/local/bin/kubectl https://storage.googleapis.com/kubernetes-release/release/$(curl -s https://storage.googleapis.com/kubernetes-release/release/stable.txt)/bin/linux/amd64/kubectl
chmod +x /usr/local/bin/kubectl
kubectl --kubeconfig *-kubeconfig.yaml get nodes

The files that are created are:

• $NAME-agent-cloud-init.yaml
• $NAME-cloud-init.yaml
• $NAME-kubeconfig.yaml
• $NAME-kubeconfig-orig.yaml

You can clean up the instances by running multipass delete k3s-server-$NAME-1 --purge and multipass delete k3s-agent-$NAME-{1,2,3} or (WARNING this deletes and purges all instances): multipass delete --all --purge