nova-dhcpbridge assumes only 2 additional arguments to add, old, del

[Chet Burgess]

The current version of the nova-dhcpbridge script will exit with an error if the add, old, or del actions are called with more then 2 additional arguments (mac, ip).

In fact dnsmasq calls the script with up to 3 additional arguments:

mac, ip, hostname

hostname is only passed if its known to dnsmasq. In a standard openstack setup it is known since we populate the dhcp host file with a name.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/20363

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/20363
Committed: http://github.com/openstack/nova/commit/d94e693bc49d5ce717ea62f02741dccc435af3f3
Submitter: Jenkins
Branch: master

commit d94e693bc49d5ce717ea62f02741dccc435af3f3
Author: Chet Burgess <email address hidden>
Date: Thu Jan 24 02:10:18 2013 +0000

    Support optional 4 arg for nova-dhcpbridge

    dnsmasq will call the add, old, and del actions with an optional
    4 argument of hostname if the hostname is known. Since we populate
    the hostname in the DHCP host file its always passed to us.

    Add an optional 4 argument for hostname for the add, old, and del
    actions.

    Change-Id: I1a6c095324be2424d6c1d469877b254f88fba4aa
    Fixes: bug #1103783