Netplan: ‘gateway4’ has been deprecated, use default routes instead

kientt 12:14 - 3/06/2022

** (generate:2683): WARNING **: 15:41:56.657: `gateway4` has been deprecated, use default routes instead.
See the ‘Default routes’ section of the documentation for more details.

FIX:

Step 1: vi /etc/netplan/00-installer-config.yaml

Step 2: Remove: gateway4: xxx.xxx.xxx.xxx

Step 3: Add routes

routes:
- to: default
  via: xxx.xxx.xxx.xxx

Step 4: netplan apply

Read more: https://netplan.io/examples/#using-dhcp-and-static-addressing