A set of roles to configure and initialize a Kubernetes cluster on a group of Raspberry Pis running HypriotOS. There are two major components here. First off, we're bootstrapping the nodes using a cloud-init script (yes it's technically hacky because our init count >1...) and prepping them for duty. This step can involve changing the nodes' IPs and will fail after it runs the cloud-init script. To avoid that just use the DHCP assigned IPs and configure them as the static_host_ip. The second part involves using kubeadm to init a new cluster, fire up flannel, and then join the worker nodes.
vars/variables.yml
gateway_ip: GATEWAY_IP (i.e. 172.25.1.1/24)
ssh_pub_key: PUBLIC_KEY_HERE (i.e. pbcopy < ~/.ssh/id_rsa.pub & paste here)
hosts.yml
# Existing Raspberry Pi DHCP IPs from nmap -sS -p 22 $NETWORK (i.e. 172.25.1.1/24)
[init-nodes]
172.25.1.150 host_name=master-node static_host_ip=172.25.1.50/24
172.25.1.151 host_name=worker-node-01 static_host_ip=172.25.1.51/24
172.25.1.152 host_name=worker-node-02 static_host_ip=172.25.1.52/24
172.25.1.153 host_name=worker-node-03 static_host_ip=172.25.1.53/24
172.25.1.154 host_name=worker-node-04 static_host_ip=172.25.1.54/24
172.25.1.155 host_name=worker-node-05 static_host_ip=172.25.1.55/24
172.25.1.156 host_name=worker-node-06 static_host_ip=172.25.1.56/24
172.25.1.157 host_name=worker-node-07 static_host_ip=172.25.1.57/24
# Master node IPs
[masters]
172.25.1.50
# Worker node IPs
[workers]
172.25.1.51
172.25.1.52
172.25.1.53
172.25.1.54
172.25.1.55
172.25.1.56
172.25.1.57
execute ansible-playbook configure-pis.yml -i hosts.yml (if you haven't configured ssh login then add --ask-pass)
