From a4f3931ca29073e8a5a943504b7c4404fdbb9f3a Mon Sep 17 00:00:00 2001
From: chen-li <shchenli@cn.ibm.com>
Date: Mon, 18 Jul 2016 03:39:46 -0500
Subject: [PATCH] Disbale DNS update for port o-hm0 in devstack

Disable the DNS update for port o-hm0 during the installation of
devstack to aviod accidentally DNS change.

Note: NetworkManager will attempt to write DNS information from
DHCP into /etc/resolv.conf, overwriting the existing contents.
So, if you have NetworkManager enabled, the once for all solution
should be set the immutable bit on the file:
    chattr +i /etc/resolv.conf

Change-Id: Icbc23feb8cb3c9967aa66a3c6c2f61da61397d11
---
 etc/dhcp/dhclient.conf | 1 +
 1 file changed, 1 insertion(+)

diff --git a/etc/dhcp/dhclient.conf b/etc/dhcp/dhclient.conf
index ed682e970f..29e33152d1 100644
--- a/etc/dhcp/dhclient.conf
+++ b/etc/dhcp/dhclient.conf
@@ -1 +1,2 @@
 request subnet-mask,broadcast-address,interface-mtu;
+do-forward-updates false;