When i create a VM in VMWare from a clone / Template, using OS Guest Customization (via user-data).
The DNS servers are not set:

open-vm-tools log shows:
/var/log/vmware-imc/toolsDeployPkg.log
Customization command output: INFO: Opening file name /tmp/.vmware/linux/deploy/cust.cfg.
DEBUG: [DNS]
DEBUG: FOUND CATEGORY = DNS
DEBUG: DNSFROMDHCP=yes
DEBUG: ADDED KEY-VAL :: DNS|DNSFROMDHCP = yes

If i create the VM from vSphere Client, the DNS is correctly set up