Skip to content

Latest commit

 

History

History
41 lines (33 loc) · 1.83 KB

README.md

File metadata and controls

41 lines (33 loc) · 1.83 KB
Raw

This Ansible playbook turns your fleet of Raspberry Pi into Kubernetes cattle with k3s, the streamlined version of Kubernetes by @rancher that runs silky smooth on the ARM processor powering your Pi.

Manually prepare your Raspberries

  • Burn Raspian Stretch Lite on an SD card with EtcherBalena, or something alike
  • Create an empty ssh file in the root of the SD card (volume is called boot)

Secure your Raspberries

Optional but advisable: use SSH key auth and disable password login. The default ssh credentials for a Raspberry Pi are username pi and password raspberry.

  • Copy your pubkey to the Pi with ssh-copy-id [email protected]
  • In /etc/ssh/sshd_config on the Pi, set PasswordAuthentication to no

Configure ansible setup

  • Copy ansible/hosts.template to ansible/hosts for your configuration
  • Choose one of the Raspberries to lead / orchestrate your cluster; we'll call this the server
  • In ansible/hosts, fill out the ip or hostname for the leading Raspberry under [k3s-server]
  • Fill out the ip's or hostnames for the rest of your cattle under [k3s-agents]

I personally prefer using the Pi's hardware mac address to assign a hostname and ip address within the LAN by DHCP, but you could also set a static ip address on the Pi.

Provision the nodes

When you're all set up and configured, run the Ansible playbook:

$ make

This will:

  • Install the k3s binary on the 'server' Pi (the leading node)
  • Install a k3s-server service on the server and start it
  • Fetch the node token from the server
  • Install and start a k3s-agent service on the agents, joining the cluster
  • Enable autostart on boot for k3s on all nodes

See if it worked

Log into your server node and run:

$ sudo k3s kubectl get node -o wide

You should see all of your nodes broadcasting a Ready status.

Happy cattle herding!