Public bug reported: Whenever any change is made to a DHCP agent port, a refresh of all security group filters for all ports on that network is triggered. This is unnecessary as all instance ports automatically get a blanket allow rule for DHCP port numbers. So changes to DHCP ports in no way require updates to any filters.
For networks with a large number of ports, this also generates significant load against neutron-server and the backend database. Steps to reproduce: - Network with some number of instance ports - Add or remove a DHCP agent from that network (constitutes a change of DHCP ports) - A refresh for all ports on that network is triggered See: https://github.com/openstack/neutron/blob/master/neutron/db/securitygroups_rpc_base.py#L138-L140 We experience this issue in Liberty, and it's still present in master. ** Affects: neutron Importance: Undecided Assignee: Mike Dorman (mdorman-m) Status: In Progress -- You received this bug notification because you are a member of Yahoo! Engineering Team, which is subscribed to neutron. https://bugs.launchpad.net/bugs/1653830 Title: Security group filters for all ports are refreshed on any DHCP port change Status in neutron: In Progress Bug description: Whenever any change is made to a DHCP agent port, a refresh of all security group filters for all ports on that network is triggered. This is unnecessary as all instance ports automatically get a blanket allow rule for DHCP port numbers. So changes to DHCP ports in no way require updates to any filters. For networks with a large number of ports, this also generates significant load against neutron-server and the backend database. Steps to reproduce: - Network with some number of instance ports - Add or remove a DHCP agent from that network (constitutes a change of DHCP ports) - A refresh for all ports on that network is triggered See: https://github.com/openstack/neutron/blob/master/neutron/db/securitygroups_rpc_base.py#L138-L140 We experience this issue in Liberty, and it's still present in master. To manage notifications about this bug go to: https://bugs.launchpad.net/neutron/+bug/1653830/+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
