Public bug reported:
https://github.com/openstack/neutron/commit/1f8378e0ac4b8c3fc4670144e6efc51940d796ad
was supposed to change other-config:mac-table-size to set a higher value of
mac-table-size
option can be set for bridge. Instead, it overwrites the entire other-config
array and thus interferes with tripleo's undercloud settings where
other-config:hwaddr is a requirement.
neutron-openvswitch-agent thus resets the MAC address to a random value
although it should be fixed to the underlying interface's MAC>
The original bridge configuration is:
~~~
ov[root@undercloud-7 ~]# ovs-vsctl list-bridge br-ctlplane
ovs-vsctl: unknown command 'list-bridge'; use --help for help
[root@undercloud-7 ~]# ovs-vsctl list bridge br-ctlplane
_uuid : d56235c5-4933-4334-b33b-be2134c99995
auto_attach : []
controller : []
datapath_id : "0000525400ec14c2"
datapath_type : ""
datapath_version : "<unknown>"
external_ids : {bridge-id=br-ctlplane}
fail_mode : standalone
flood_vlans : []
flow_tables : {}
ipfix : []
mcast_snooping_enable: false
mirrors : []
name : br-ctlplane
netflow : []
other_config : {hwaddr="52:54:00:ec:14:c2"}
ports : [054cde3c-0e02-497d-ac25-be8e6992f708,
fcbfcff7-d6b8-4bce-824d-085a681663cf]
protocols : []
rstp_enable : false
rstp_status : {}
sflow : []
status : {}
stp_enable : false
~~~
The new version of neutron-openvswitch-agent sets this:
~~~
2018-10-02 12:31:43.032 3949 DEBUG neutron.agent.ovsdb.impl_idl [-] Running txn
command(idx=1): DbSetCommand(table=Bridge, col_values=(('other_config',
{'mac-table-size': '50000'}),), record=br-ctlplane) do_commit
/usr/lib/python2.7/site-packages/neutron/agent/ovsdb/impl_idl.py:98
~~~
Which removes the hwaddr:
~~~
[root@undercloud-7 ~]# ovs-vsctl list bridge br-ctlplane
_uuid : 334f1314-e024-4c0e-ad6f-acddaa43bb40
auto_attach : []
controller : [505d73e7-4049-44b8-862c-e19e556bc051]
datapath_id : "000016134f330e4c"
datapath_type : system
datapath_version : "<unknown>"
external_ids : {bridge-id=br-ctlplane}
fail_mode : secure
flood_vlans : []
flow_tables : {}
ipfix : []
mcast_snooping_enable: false
mirrors : []
name : br-ctlplane
netflow : []
other_config : {mac-table-size="50000"}
ports : [18c205e9-c869-4c0b-a24a-18e249cf4f3e,
90ab6c75-f108-4716-a328-9c26ba7b1a75]
protocols : ["OpenFlow10", "OpenFlow13"]
rstp_enable : false
rstp_status : {}
sflow : []
status : {}
stp_enable : false
~~~
When it should run something similar to this manual command:
~~~
[root@undercloud-7 ~]# ovs-vsctl set bridge br-ctlplane
other-config:mac-table-size=50000
[root@undercloud-7 ~]# ovs-vsctl list bridge br-ctlplane
_uuid : d56235c5-4933-4334-b33b-be2134c99995
auto_attach : []
controller : []
datapath_id : "0000525400ec14c2"
datapath_type : ""
datapath_version : "<unknown>"
external_ids : {bridge-id=br-ctlplane}
fail_mode : standalone
flood_vlans : []
flow_tables : {}
ipfix : []
mcast_snooping_enable: false
mirrors : []
name : br-ctlplane
netflow : []
other_config : {hwaddr="52:54:00:ec:14:c2", mac-table-size="50000"}
ports : [054cde3c-0e02-497d-ac25-be8e6992f708,
fcbfcff7-d6b8-4bce-824d-085a681663cf]
protocols : []
rstp_enable : false
rstp_status : {}
sflow : []
status : {}
stp_enable : false
[root@undercloud-7 ~]#
[root@undercloud-7 ~]# ip link ls dev br-ctlplane
14: br-ctlplane: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state
UNKNOWN mode DEFAULT group default qlen 1000
link/ether 52:54:00:ec:14:c2 brd ff:ff:ff:ff:ff:ff
~~~
The neutron OVS agent issue can be reproduced manually:
~~~
[root@undercloud-7 ~]# ovs-vsctl set bridge br-ctlplane
other-config='{mac-table-size=50000}'
[root@undercloud-7 ~]# ovs-vsctl list bridge br-ctlplane | grep other
other_config : {mac-table-size="50000"}
[root@undercloud-7 ~]# ip link ls dev br-ctlplane
14: br-ctlplane: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state
UNKNOWN mode DEFAULT group default qlen 1000
link/ether c6:35:62:d5:34:43 brd ff:ff:ff:ff:ff:ff
[root@undercloud-7 ~]#
~~~
** Affects: neutron
Importance: Undecided
Status: New
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You received this bug notification because you are a member of Yahoo!
Engineering Team, which is subscribed to neutron.
https://bugs.launchpad.net/bugs/1795716
Title:
neutron-openvswitch-agent deletes existing other_config and thus
breaks undercloud's MAC address assignment in tripleo
Status in neutron:
New
Bug description:
https://github.com/openstack/neutron/commit/1f8378e0ac4b8c3fc4670144e6efc51940d796ad
was supposed to change other-config:mac-table-size to set a higher value of
mac-table-size
option can be set for bridge. Instead, it overwrites the entire other-config
array and thus interferes with tripleo's undercloud settings where
other-config:hwaddr is a requirement.
neutron-openvswitch-agent thus resets the MAC address to a random
value although it should be fixed to the underlying interface's MAC>
The original bridge configuration is:
~~~
ov[root@undercloud-7 ~]# ovs-vsctl list-bridge br-ctlplane
ovs-vsctl: unknown command 'list-bridge'; use --help for help
[root@undercloud-7 ~]# ovs-vsctl list bridge br-ctlplane
_uuid : d56235c5-4933-4334-b33b-be2134c99995
auto_attach : []
controller : []
datapath_id : "0000525400ec14c2"
datapath_type : ""
datapath_version : "<unknown>"
external_ids : {bridge-id=br-ctlplane}
fail_mode : standalone
flood_vlans : []
flow_tables : {}
ipfix : []
mcast_snooping_enable: false
mirrors : []
name : br-ctlplane
netflow : []
other_config : {hwaddr="52:54:00:ec:14:c2"}
ports : [054cde3c-0e02-497d-ac25-be8e6992f708,
fcbfcff7-d6b8-4bce-824d-085a681663cf]
protocols : []
rstp_enable : false
rstp_status : {}
sflow : []
status : {}
stp_enable : false
~~~
The new version of neutron-openvswitch-agent sets this:
~~~
2018-10-02 12:31:43.032 3949 DEBUG neutron.agent.ovsdb.impl_idl [-] Running
txn command(idx=1): DbSetCommand(table=Bridge, col_values=(('other_config',
{'mac-table-size': '50000'}),), record=br-ctlplane) do_commit
/usr/lib/python2.7/site-packages/neutron/agent/ovsdb/impl_idl.py:98
~~~
Which removes the hwaddr:
~~~
[root@undercloud-7 ~]# ovs-vsctl list bridge br-ctlplane
_uuid : 334f1314-e024-4c0e-ad6f-acddaa43bb40
auto_attach : []
controller : [505d73e7-4049-44b8-862c-e19e556bc051]
datapath_id : "000016134f330e4c"
datapath_type : system
datapath_version : "<unknown>"
external_ids : {bridge-id=br-ctlplane}
fail_mode : secure
flood_vlans : []
flow_tables : {}
ipfix : []
mcast_snooping_enable: false
mirrors : []
name : br-ctlplane
netflow : []
other_config : {mac-table-size="50000"}
ports : [18c205e9-c869-4c0b-a24a-18e249cf4f3e,
90ab6c75-f108-4716-a328-9c26ba7b1a75]
protocols : ["OpenFlow10", "OpenFlow13"]
rstp_enable : false
rstp_status : {}
sflow : []
status : {}
stp_enable : false
~~~
When it should run something similar to this manual command:
~~~
[root@undercloud-7 ~]# ovs-vsctl set bridge br-ctlplane
other-config:mac-table-size=50000
[root@undercloud-7 ~]# ovs-vsctl list bridge br-ctlplane
_uuid : d56235c5-4933-4334-b33b-be2134c99995
auto_attach : []
controller : []
datapath_id : "0000525400ec14c2"
datapath_type : ""
datapath_version : "<unknown>"
external_ids : {bridge-id=br-ctlplane}
fail_mode : standalone
flood_vlans : []
flow_tables : {}
ipfix : []
mcast_snooping_enable: false
mirrors : []
name : br-ctlplane
netflow : []
other_config : {hwaddr="52:54:00:ec:14:c2", mac-table-size="50000"}
ports : [054cde3c-0e02-497d-ac25-be8e6992f708,
fcbfcff7-d6b8-4bce-824d-085a681663cf]
protocols : []
rstp_enable : false
rstp_status : {}
sflow : []
status : {}
stp_enable : false
[root@undercloud-7 ~]#
[root@undercloud-7 ~]# ip link ls dev br-ctlplane
14: br-ctlplane: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue
state UNKNOWN mode DEFAULT group default qlen 1000
link/ether 52:54:00:ec:14:c2 brd ff:ff:ff:ff:ff:ff
~~~
The neutron OVS agent issue can be reproduced manually:
~~~
[root@undercloud-7 ~]# ovs-vsctl set bridge br-ctlplane
other-config='{mac-table-size=50000}'
[root@undercloud-7 ~]# ovs-vsctl list bridge br-ctlplane | grep other
other_config : {mac-table-size="50000"}
[root@undercloud-7 ~]# ip link ls dev br-ctlplane
14: br-ctlplane: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue
state UNKNOWN mode DEFAULT group default qlen 1000
link/ether c6:35:62:d5:34:43 brd ff:ff:ff:ff:ff:ff
[root@undercloud-7 ~]#
~~~
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