Cloud images are currently masking /etc/udev/rules.d/80-net-setup-link.rules to disable predictable network interface names (https://pagure.io/fedora-kickstarts/blob/9e8d98f16315a05ebf953ee6a165b70a05b4aa99/f/fedora-cloud-base.ks#_190).

This has the unwanted side effect of breaking systemd-networkd in some cases (details here: https://lists.freedesktop.org/archives/systemd-devel/2016-November/037796.html).

Lennart found an alternative that consists of masking /etc/systemd/network/99-default.link instead. Official wiki page was updated accordingly: https://www.freedesktop.org/wiki/Software/systemd/PredictableNetworkInterfaceNames/

Cheers,
Sylvain