Verity and Networking

In non-verity images, usually user can leverage cloud-init to provide default networking settings. However, cloud-init fails to provision the network in verity images since /etc is not writable.

Solution: Specify Network Settings Manually

For verity images, it’s recommended to specify network settings manually. Here is an example network configuration that can be added to the additionalFiles in your configuration YAML file:

os:
  additionalFiles:
  - content: |
      # SPDX-License-Identifier: MIT-0
      #
      # This example config file is installed as part of systemd.
      # It may be freely copied and edited (following the MIT No Attribution license).
      #
      # To use the file, one of the following methods may be used:
      # 1. add a symlink from /etc/systemd/network to the current location of this file,
      # 2. copy the file into /etc/systemd/network or one of the other paths checked
      #    by systemd-networkd and edit it there.
      # This file should not be edited in place, because it'll be overwritten on upgrades.

      # Enable DHCPv4 and DHCPv6 on all physical ethernet links
      [Match]
      Kind=!*
      Type=ether

      [Network]
      DHCP=yes
    destination: /etc/systemd/network/89-ethernet.network
    permissions: "664"