Reviewed: https://review.openstack.org/626641 Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=ffbf65126fcd25ca242e5512b6e30cb7a1b4ef37 Submitter: Zuul Branch: master
commit ffbf65126fcd25ca242e5512b6e30cb7a1b4ef37 Author: aojeagarcia <[email protected]> Date: Thu Dec 20 19:49:56 2018 +0100 protect DHCP agent cache out of sync If DHCP agent port cache is out of sync with neutron server, dnsmasq entries are wrong and VMs may not acquire an IP because of duplicate entries. When DHCP agent executes port_create_end method, port's IP should be checked before being used, if there are duplicate IP addresses in the same network in the cache we should resync. Co-Authored-By: [email protected] Closes-Bug: #1645835 Change-Id: Icc555050283420fddfb90bb67e02bc303e989e27 ** Changed in: neutron Status: In Progress => Fix Released -- You received this bug notification because you are a member of Yahoo! Engineering Team, which is subscribed to neutron. https://bugs.launchpad.net/bugs/1645835 Title: protect for dhcp agent cache out of sync with neutron server Status in neutron: Fix Released Bug description: If DHCP agent port cache is out of sync with neutron server, new VM may not get it's IP. when DHCP agent execute port_create_end method, port's IP should be checked before being used. The scenario might be: 1)create a VM， neutron server notify DHCP agent port_create_end 2)destroy this VM, neutron server notify DHCP agent port_delete_end if rpc message of port_delete_end lost at this step, neutron server will be out of sync with DHCP agent cache. The port will still exit in DHCP agent cache, Dnsmasq will still have port's mac-host-ip record in host file. 3)create a new VM, neutron server may allocate the IP which cached in DHCP agent, this VM will not get IP when it start, because Dnsmasq have two records about this IP. To manage notifications about this bug go to: https://bugs.launchpad.net/neutron/+bug/1645835/+subscriptions -- Mailing list: https://launchpad.net/~yahoo-eng-team Post to : [email protected] Unsubscribe : https://launchpad.net/~yahoo-eng-team More help : https://help.launchpad.net/ListHelp
