K8s-Ansible

This is used to provision the Raspberry Pi nodes in the single cluster.

Credentials File

You will need to create an encrypted vault file which contains:

cluster_username: username
cluster_password: password
cluster_sudo_password: sudo_password

Install microk8s and setup cluster

ansible-playbook -i all-hosts k8s.yaml --vault-password-file ansible-vault-password --extra-vars '@vault.yaml'

To run kubectl on a remote machine against the cluster, retrieve the config from the master node:

microk8s config

You will need to run the following to get the token to be able to access the dashboard:

token=$(microk8s kubectl -n kube-system get secret | grep default-token | cut -d " " -f1)
microk8s kubectl -n kube-system describe secret $token

Reset all Nodes in the Cluster

ansible-playbook -i all-hosts reset.yaml --vault-password-file ansible-vault-password --extra-vars '@vault.yaml'

Add SSH Key Certs to known_hosts

ansible-playbook -i all-hosts ssh_cert.yaml --vault-password-file ansible-vault-password --extra-vars '@vault.yaml'

Poweroff all hosts

ansible-playbook -i all-hosts poweroff.yaml --vault-password-file ansible-vault-password --extra-vars '@vault.yaml'