vm-ansible/roles/netplan/templates/netplan.yaml

# {{ansible_managed}}
network:
  version: 2
  renderer: networkd
  ethernets:
    {{ ansible_default_ipv4.interface }}:
      dhcp4: true
      dhcp-identifier: mac
      dhcp4-overrides:
        use-routes: false
{% if netplan.default_gateway is defined and netplan.default_gateway|length > 0 %}
      gateway4: {{netplan.default_gateway}}
{% endif %}
{% if netplan.additionalinterfaces is defined and netplan.additionalinterfaces|length > 0 %}
{% for interface in netplan.additionalinterfaces %}
    {{ interface.name }}:
      dhcp4: {{ interface.dhcp4 }}
      dhcp6: {{ interface.dhcp6 }}
      dhcp-identifier: mac
      dhcp4-overrides:
        use-routes: false
{% if interface.addresses is defined and interface.addresses|length > 0 %}
      addresses:
{% for address in interface.addresses %}
        - {{address}}
{% endfor %}
{% endif %}
{% if interface.gateway4 is defined and interface.gateway4|length > 0 %}
      gateway4: {{interface.gateway4}}
{% endif %}
{% if interface.gateway6 is defined and interface.gateway6|length > 0  %}
      gateway6: '{{interface.gateway6}}'
{% endif %}
{% if interface.denydns %}
      nameservers:
        addresses: []
        search: []
{% endif %}
{% endfor %}
{% endif %}
...