metallb_namespace: metallb-system
metallb_subnet_cidr_prefix: 27  # /27
metallb_subnet_index: -1  # last subnet
metallb_addresses: |  # Use the last subnet with the specified size from the network
  {{
    (ansible_default_ipv4.network + '/' + ansible_default_ipv4.netmask)
      | ansible.netcommon.ipaddr('net')
      | ansible.netcommon.ipsubnet(metallb_subnet_cidr_prefix, metallb_subnet_index)
  }}