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lka edited this page Oct 8, 2019
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How to come from flash-card to kubernetes on a bunch of raspberry pi's?
I want to build an ansible project that is able to configure and update my raspberry pi's from bare metal to a running kubernetes cluster.
- I use a fritz!box as entrypoint to the internet and it's DHCP server provides IP-Adresses and delivers them with it's dns if I query with nslookup and the hostname. So I can use the hostname to get the connection to new hosts.
- My raspberry pi's are of version 3 B+ and I want to flash them with Hypriot-OS (have a look at the site of hypriot on git). The result is a raspberry pi that is reachable with "ssh pirate@black-pearl" and Password "hypriot".
- The flash utility of hypriot is designed for MAC's or Linux and not for Windows, so I cannot use it.
- I have a Windows 10 Machine with WSL and Debian Linux running on WSL, so I have to write the latest image with Win32 Disk Imager on Windows to the flash-card.
- Add only one raspi to the project at time.
- If no cluster exists, then create one and make the first raspi to the master node.
- If cluster exists, add next raspis to the cluster as worker nodes.
- create branch "bootstrap" for the next steps
- create a tree for the ansible Project
- write ansible_hypriot_bootstrap role:
- let raspi only be accessible with ssh-key
- configure bash
- add predefined ssh-keys as needed
- set timezone
- set locales
- configure and start ntp
- configure and start unbound
- do some misc configuration steps
- rename raspi with next node name (choose name)
- reboot raspi (now it's accessible with new name)
- write ansible kubernetes role:
- k8s - Clients
- k8s - Master
- kubernetes-dashboard
- put it all together