Comment 8 for bug 1712680

I'd like to add that we are seeing the same behavior as of Centos 7.4 and cloud-init 0.7.9-9.el7.centos.2.x86_64 in centos/os and 0.7.9-9.el7.centos.1.x86_64 in centos/updates.

We have a build pipeline that configures /etc/sysconfig/network-scripts/ifcfg-eth0 but in initial boot and any reboot thereafter it ends up being

# Created by cloud-init on instance boot automatically, do not edit.
#
BOOTPROTO=dhcp
DEVICE=eth0
HWADDR=0a:be:79:ba:6e:ec
ONBOOT=yes
TYPE=Ethernet
USERCTL=no

This only started with the new cloud-init versions in centos 7.4.

Our current solution is to set

network:
  config: disabled

in /etc/cloud/cloud.cfg which isn't ideal but works.