/usr/share/doc/netplan/examples/static.yaml

cat static.yaml
network:
  version: 2
  renderer: networkd
  ethernets:
    enp3s0:
      addresses:
        - 10.10.10.2/24
      gateway4: 10.10.10.1
      nameservers:
        search: [mydomain, otherdomain]
        addresses: [10.10.10.1, 1.1.1.1]

Static IP configuration

network:
  renderer: networkd
  ethernets:
    eno1:
      addresses:
         - 10.10.10.xx/24
      gateway4: 10.10.xx.1
      nameservers:
        search: [your_domain.com]
        addresses: [8.8.8.8, 1.1.1.1]
  version: 2

See also

• Netplan: netplan try, netplan apply, examples, networkd