Please update cloud-init's with commit 5d9b3d10cf6f066dfec3c025efc7e86deacb52be.
On systems that use either OpenStack ConfigDrive or DigitalOcean's data-source, Cloud-init on Fedora does not assign an IPv6 gateway to eth0. In the case of ConfigDrive, network_data.json defining the default route will not be assigned (the following is an example snippet):
The link is correctly defined in /etc/sysconfig/network-scripts/ifcfg-eth0:0 but no /etc/sysconfig/network-scripts/route6-eth0:0 is defined.
not sure what that commit is but couldn't find it upstream. This is the actual commit ben was requesting:
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