Comment 10 for bug 2060311

On riscv64 preinstalled images we have

$ sudo cat 50-cloud-init.yaml
# This file is generated from information provided by the datasource. Changes
# to it will not persist across an instance reboot. 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:
        zz-all-en:
            dhcp4: true
            match:
                name: en*
            optional: true
        zz-all-eth:
            dhcp4: true
            match:
                name: eth*
            optional: true
    version: 2

Before the change cloud-init finds an IPv4 address. With the change cloud-init sees no IPv4 address. So it seems that 'optional: true' is observed now.

After login network is available with IPv4 address.

How can we ensure that at least one Ethernet port is set up?