unable to create port with same ip with dhcp_enabled=false

Bug #1202392 reported by Aaron Rosen on 2013-07-17
12
This bug affects 1 person
Affects Status Importance Assigned to Milestone
neutron
High
Aaron Rosen

Bug Description

If you create a network and subnet that is set to dhcp_enabled=False. If you then create a port specifying the ip address and then delete it; you will not be able to recreate the port with the same ip address until the dhcp lease time has passed even though dhcp is disabled. This will be fixed by the blueprint remove-dhcp-lease but created bug report for issue tracking.

Aaron Rosen (arosen) on 2013-07-17
Changed in neutron:
assignee: nobody → Aaron Rosen (arosen)

Fix proposed to branch: master
Review: https://review.openstack.org/37580

Changed in neutron:
status: New → In Progress
Changed in neutron:
importance: Undecided → High

Reviewed: https://review.openstack.org/37580
Committed: http://github.com/openstack/neutron/commit/d9832282cf656b162c51afdefb830dacab72defe
Submitter: Jenkins
Branch: master

commit d9832282cf656b162c51afdefb830dacab72defe
Author: Aaron Rosen <email address hidden>
Date: Tue Jul 16 16:06:32 2013 -0700

    Remove DHCP lease logic

    Previously neutron was keeping track of dhcp lease time in order
    to ensure it didn't hand out an ip address that was already leased.
    This patch removes that logic and instead leverages the dhcp_release
    utility. This allows us to reuse ip addresses immediately after a port
    is deleted. This patch also bumps the lease time to 24 hours instead
    of 2 minutes with reduces the amount of dhcp traffic.

    DocImpact

    There is a DocImpact for this bug related to the upgrade path. One should
    first upgrade their dhcp-agents. Then wait till the dhcp_lease time has
    expired. Lastly, update neutron-server in order to avoid the case where
    an instance is deleted and the dnsmasq process has not released the lease
    and neturon allocates that ip to a new port.

    Fixes bug: 1202392
    Implements blueprint: remove-dhcp-lease

    Change-Id: Ifcb4f093c92904ceb896438987d53e692eb7fb26

Changed in neutron:
status: In Progress → Fix Committed
Changed in neutron:
milestone: none → havana-3
tags: added: l3-ipam-dhcp
Thierry Carrez (ttx) on 2013-09-05
Changed in neutron:
status: Fix Committed → Fix Released
Thierry Carrez (ttx) on 2013-10-17
Changed in neutron:
milestone: havana-3 → 2013.2
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