cluster.yml

---
# Based on:
#   - https://github.com/k3s-io/k3s-ansible (k3s installation)
#   - https://github.com/ecdye/zram-config  (limit SD-card wear out)
#   - https://github.com/insspb/ansible-role-hostname (rename nodes)


# Needed (in my case): python 2 instead of Python 3 -> bootstrap
# Set in group_vars/all.yml

- import_playbook: roles/bootstrap.yml


# For every element of the cluster
 
- hosts: cluster
  gather_facts: yes

  pre_tasks:
    - name: Prerequisite packages (iptables, nfs-common)
      apt:
        pkg:
          # Missing from k3s-io/k3s-ansible 
          - iptables 
          # As we plan to use a shared FS for volumes
          - nfs-common

  roles:
    # apt-get update && apt-get upgrade
    - role: apt-update
    # Ensure hostnames are correctly set
    - role: ansible-role-hostname
    # zram-config to use compressed memory swap + compressed memory logs
    - role: zram-config
    # From k3s-io/k3s-ansible
    - role: prereq
    - role: download
    - role: raspberrypi

  post_tasks:
    - name: Cluster shared NFS file system on Gandalf
      mount:
        src: gandalf:/scratch/cluster
        path: /mnt/shared
        opts: rw
        state: mounted
        fstype: nfs


  # Uncomment in case of issue; should already have been done in raspberrypi role
  #   - name: reboot cluster
  #     reboot:


# Cluster master node specifics

- hosts: master

  roles:
    - role: k3s/master


# Cluster nodes specifics

- hosts: node

  roles:
    - role: k3s/node


# Get .kube/config file
# scp pinode0:~/.kube/config ~/.kube/config