Configuring FQDN for GCE instance

set-hostname.patch

diff -Naur before/usr/share/google/set-hostname after/usr/share/google/set-hostname
--- before/usr/share/google/set-hostname	2016-03-16 18:30:48.000000000 +0900
+++ after/usr/share/google/set-hostname	2016-03-16 18:34:57.000000000 +0900
@@ -14,6 +14,9 @@
 
 # Deal with a new hostname assignment.
 
+# *** The below line is added by patching. ***
+new_host_name=$(curl --fail --silent http://metadata/computeMetadata/v1/instance/attributes/hostname  -H "Metadata-Flavor: Google")
+
 if [ -n "$new_host_name" ] && [ -n "$new_ip_address" ]; then
   # Delete entries with new_host_name or new_ip_address in /etc/hosts.
   sed -i '/Added by Google/d' /etc/hosts

@yuki-takeichi: I have patched the set-hostname script based on your gist but I have spot some other differences from the original script. Therefore I'd like to ask you: Is there any reason for that ?

Below you'll find an image comparing the differences.

Having the right side of the config the hostname went back to the previous version, non fqdn. Do you have any idea why?

Thanks for the gist! +1

Do you have a steps by steps on how to do this on my GCE instances CentOS?

@edzeldiana: its only one step, run this command: sudo sed -i "\$ahostname YourFQDN" /etc/dhcp/dhclient-exit-hooks