Netplan

Ubuntu network configuration new style

Links

• Homepage
• Netplan examples

HOWTO

Show netplan config

netplan get all

Verify netplan config

netplan try

This will apply the setting but returns to old ones if you don't hit enter in time.

Update netplan settings

• netplan-set

Update nameserver list

netplan set "ethernets.eth0.nameservers.addresses=NULL"

and then

netplan set "ethernets.eth0.nameservers.addresses=[192.168.100.1, 192.168.100.19]"

FAQ

Cannot call Open vSwitch

apt install openvswitch-switch-dpdk

An error occurred: 'NetplanApply' object has no attribute 'state

That's because netplan is broken, try:

netplan try --state /etc/netplan

`gateway6` has been deprecated, use default routes instead

Use:

 routes:
   - to: default
     via: fe80::1

Error in network definition: expected mapping (check indentation)

It seems to prefer list of addresses in square brackets

`gateway4` has been deprecated, use default routes instead.

Try

routes:
  - to: default
    via: 192.168.10.1

Permissions for /etc/netplan/00-installer-config.yaml are too open. Netplan configuration should NOT be accessible by others.

chmod 0600 /etc/netplan/00-installer-config.yaml

Prevent cloudinit from updating netplan

Create /etc/cloud/cloud.cfg.d/99-custom-networking.cfg and add:

network: {config: disabled}