Please cherry-pick following commit from MASTER for fixing CLOUDSTACK-4199.
Thanks!
--Sheng
commit 2a26823ec19524051dd3cc11a338b36e2cecf437
Author: Sheng Yang <sheng.y...@citrix.com>
Date: Thu Aug 22 17:45:12 2013 -0700
CLOUDSTACK-4199: Only use ifdown/ifup for the un-configured eth2
Seems the behavior of ifdown/ifup changed in new version, that it would
only
enable the default IP of eth2, regardless we can configure additional
ips for
it. So we would always use ifconfig for interface control whenever
possible(a.k.a eth2 already got ip addresses).
When VR is booting up, ipassoc command hasn't been delivered, it's
possible that
eth2 doesn't have any ip address, then ifconfig would fail because it
doesn't
know how to find the ip for eth2. So in this only case, we would use
ifdown/ifup
to set the ip address according to /etc/network/interfaces.
It can potentially racy againest ipassoc command, but biglock should
prevent
racy condition from happening.
