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flash-to-kubernetes-on-raspi

how to come from flash-card to kubernetes on a bunch of raspberry pi's

Goal

I want to build an ansible project that is able to configure and update raspberry pi's from bare metal to a running kubernetes cluster.

Editing

I use the Windows Subsystem for Linux (WSL) with debian installed. There I use vi as editor and ansible-lint to check the ansible files.

Environment

$ sudo apt-get update && sudo apt-get -y upgrade
$ sudo apt-get -y install python-pip python-dev libffi-dev libssl-dev wget ssh git sshpass
$ sudo pip install ansible
$ sudo mkdir /etc/ansible
$ sudo wget https://raw.githubusercontent.com/ansible/ansible/devel/examples/ansible.cfg -O "/etc/ansible/ansible.cfg"
$ sudo pip install ansible-lint
$ ssh-keygen -b 4096 rsa

this installs:

  • ansible >= 2.7
  • wget
  • git
  • ssh with key in .ssh/id_rsa and .ssh/id_rsa.pub
  • sshpass

Installation

clone project from github

Quick Start

  • download newest Hypriot OS
  • unzip and write it to flash-card (either with flash tool or Win32 Disk Imager)
  • boot raspberry pi with flash-card inserted
  • dive into ansible directory
  • configure each raspi with it's name f.e. node3
$ ansible-playbook -e dbs_hostname=node3 bootstrap.yml
  • raspi will be configured and rebooted, then it will be accessible with
$ ssh pirate@node3
  • create cluster with all nodes
$ ansible-playbook k8s.yml
  • raspis will be configured as k8s nodes, then they will be visible with
$ kubectl get nodes
  • show dashboard parameters to get access
$ ansible-playbook k8s.yml --tags k8s_get_dashboard -e "k8s_dashboard=true"
  • reset cluster (all nodes and master)
$ ansible-playbook k8s.yml --tags k8s_reset -e "k8s_reset_cluster=true"
  • upgrade cluster (all nodes and master)
$ ansible-playbook k8s.yml --tags k8s_upgrade -e "k8s_upgrade_cluster=true"