This CoreOS VM is supposed to work with DHCP, but creates an invalid resolv.conf and does not send its hostname to the DHCP server, which prevents the DNS resolution of the VM's FQDN from working.
# systemctl --version
systemd 215
-PAM -AUDIT -SELINUX +IMA -SYSVINIT +LIBCRYPTSETUP -GCRYPT -ACL -XZ +SECCOMP -APPARMOR
# cat /etc/lsb-release
DISTRIB_ID=CoreOS