Ubuntu Server Static IP [17.10+]

01-netcfg.yaml

# change ip/gateway/dns as per your network design
network:
    version: 2
    renderer: networkd
    ethernets:
        enp3s0:
            addresses:
                - 10.10.10.2/24
            nameservers:
                search: [mydomain, otherdomain]
                addresses: [10.10.10.1, 1.1.1.1]
            routes:
                - to: default
                  via: 10.10.10.1

staticip-ubuntuserver.txt

# Post Ubuntu 17.10, Netplan is the default network management tool
# 2 renderers: 
#   Systemd-networkd [Server] / NetworkManager [Desktop]

# identify the ethernet interface name (like ens2)
ip a
ip link

# Disable any Cloud.init configurations, if present
sudo nano /etc/cloud/cloud.cfg.d/99-disable-network-config.cfg
#------------------------------------------
network: {config: disabled }
#------------------------------------------
    
# Assign static IP
sudo nano /etc/netplan/01-netcfg.yaml
#------------------------------------------
network:
    version: 2
    renderer: networkd
    ethernets:
        enp3s0:
            addresses:
                - 10.10.10.2/24
            nameservers:
                search: [mydomain, otherdomain]
                addresses: [10.10.10.1, 1.1.1.1]
            routes:
                - to: default
                  via: 10.10.10.1
 #------------------------------------------
 
 # Save and apply changes
 sudo netplan apply