Ubuntu Server 17.10 and Netplan

black3dynamite

Since I'm using KVM on Fedora Workstation I needed to add a isolated interface so I can access my VM from the host. First of all loopback interface was the only thing in /etc/network/interfaces.

I thought something was broken so I added my ens3 (macvtap-bridge) and ens4 (isolated) interfaces.

And then none of commands that we normally would use was not available.
After doing some Google-fu, I found out that Ubuntu Server 17.10 uses NetPlan to manage the network configuraton now.

https://wiki.ubuntu.com/Netplan

The configuration in /etc/netplan/01-netcfg.yaml looks this.

# This file describes the network interfaces available on your system
# For more information, see netplan(5).
network:
  version: 2
  renderer: networkd
  ethernets:
    ens3:
      dhcp4: yes
    ens4:
       dhcp4: yes

The supported renderers are NetworkManager NetworkManager and systemd-networkd networkd.

The following commands is available to generate and apply the configuration.

# Use /etc/netplan to generate the required configuration for the renderers.
sudo netplan generate

# Apply all configuration for the renderers, restarting them as necessary.
sudo netplan apply

# Attempt to generate an equivalent configuration to what is specified in /etc/network/interfaces.
sudo netplan ifupdown-migrate