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Get k3s with OpenFaaS using k3sup and multipass

Get k3s with OpenFaaS using k3sup and multipass

multipass from Canoncial is like Docker Desktop, but for Ubuntu and works on MacOS, Linux and Windows.

Use-case:

We can get a Kubernetes cluster with k3s in a very short period of time. We can use this for workshops and building labs, and for R&D, including testing.

#cloud-config
ssh_authorized_keys:
  - ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQC8Q/aUYUr3P1XKVucnO9mlWxOjJm+K01lHJR90MkHC9zbfTqlp8P7C3J26zKAuzHXOeF+VFxETRr6YedQKW9zp5oP7sN+F2gr/pO7GV3VmOqHMV7uKfyUQfq7H1aVzLfCcI7FwN2Zekv3yB7kj35pbsMa1Za58aF6oHRctZU6UWgXXbRxP+B04DoVU7jTstQ4GMoOCaqYhgPHyjEAS3DW0kkPW6HzsvJHkxvVcVlZ/wNJa1Ie/yGpzOzWIN0Ol0t2QT/RSWOhfzO1A2P0XbPuZ04NmriBonO9zR7T1fMNmmtTuK7WazKjQT3inmYRAqU6pe8wfX8WIWNV7OowUjUsv alex@alexr.local

runcmd:
- curl -SLsf https://get.k3sup.dev | sh
- mkdir -p /home/ubuntu/.kube/
- k3sup install --local --local-path /home/ubuntu/.kube/config
- curl -sLfS https://cli.openfaas.com | sh
- HOME=/home/ubuntu k3sup app install openfaas | tee /home/ubuntu/post-install.txt
- echo "export KUBECONFIG=/home/ubuntu/.kube/config" | tee -a /home/ubuntu/.bashrc
- chown ubuntu:ubuntu -R /home/ubuntu/
  • Edit the ssh_authorized_keys and replace with your own $HOME/.ssh/id_rsa.pub value

  • multipass launch ubuntu --name k3s-1 --cloud-init=./cloud-init.yaml

  • Run multipass info k3s-1 and get the IP and set export IP="" with the value

  • Next run:

k3sup install --user ubuntu --ip $IP --skip-install

This step will download the KUBECONFIG file from the VM, that you can use to access OpenFaaS and your k3s cluster!

  • Grab the OpenFaaS post-install instructions: ssh ubuntu@$IP cat post-install.sh

You're now good to go.

@Tanoh-Hermann

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Tanoh-Hermann commented Jan 19, 2020

Thanks! (--no-install flag now = --skip-install)

@alexellis

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alexellis commented Jan 19, 2020

Good catch 👍

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