Following the notes above, check /etc/netplan and open /etc/netplan/50-cloud-init.yaml:

# This file is generated from information provided by
# the datasource.  Changes to it will not persist across an instance.
# To disable cloud-init's network configuration capabilities, write a file
# /etc/cloud/cloud.cfg.d/99-disable-network-config.cfg with the following:
# network: {config: disabled}
network:
  ethernets:
    ens192:
      dhcp4: true
    ens224:
      dhcp4: true
  version: 2

It looks like you can disable cloud network, but I do not use cloud-init, so remove it:

sudo apt-get remove cloud-init

Then change /etc/netplan/50-cloud-init.yaml to:

# This file is generated from information provided by
# the datasource.  Changes to it will not persist across an instance.
# To disable cloud-init's network configuration capabilities, write a file
# /etc/cloud/cloud.cfg.d/99-disable-network-config.cfg with the following:
# network: {config: disabled}
network:
  ethernets:
    ens192:
      addresses: [192.168.32.231/24]
      gateway4: 192.168.32.1
      nameservers:
        addresses: [8.8.8.8, 8.8.4.4]
      dhcp4: no
    ens224:
      dhcp4: true
  version: 2

YAML has become popular in recent years. Here is a quick explanation of the settings above:

  • dhcp4: disable DHCP. It was true so set to no (the docs say no, not false, but false also works in testing).
  • addresses: static IP and mask.
  • nameservers: DNS servers, can set multiple.
  • gateway4: IPv4 gateway.

After saving, run:

sudo netplan try