Public bug reported:
The teardown_unused_network_gateway parameter=true parameters is used by
VlanManager in nova-network to remove bridge and vlan interfaces when
the network is deleted. With CentOS 6.5 these interfaces are not delete
bridge. In the log there are right lines:
2014-12-12 14:50:33.957 4606 DEBUG nova.openstack.common.processutils
[req-8f33392b-db62-462c-a6b5-8008b7ea5412 ] Running cmd (subprocess): sudo
nova-rootwrap /etc/nova/rootwrap.conf ip link delete br204 execute
/usr/lib/python2.6/site-packages/nova/openstack/common/processutils.py:154
2014-12-12 14:50:32.881 4606 DEBUG nova.network.linux_net
[req-3ec984c3-fbab-45c2-9002-057a6e3306a2 None] Net device removed: 'br204'
delete_net_dev /usr/lib/python2.6/site-packages/nova/network/linux_net.py:1361
But actually the bridge interface still exists:
154: br204: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state
UNKNOWN
link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
inet 10.42.1.3/24 brd 10.42.1.255 scope global br204
inet 10.42.2.3/24 brd 10.42.2.255 scope global br204
inet6 fe80::109d:f0ff:feb2:9d64/64 scope link
valid_lft forever preferred_lft forever
The command fails in the shell:
[root@node-77 ~]# ip link delete br204
RTNETLINK answers: Operation not supported
[root@node-77 ~]# echo $?
2
This bug is not a nova-network issue, but rather a problem with linux
kernel: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=680094 , but
can be fixed in nova-network by replacing "ip link delete" command with
"ip link set <dev> down && brctl delbr <dev>" commands
** Affects: nova
Importance: Undecided
Assignee: Marian Horban (mhorban)
Status: In Progress
** Tags: nova-network
** Changed in: scorched3d (Ubuntu)
Assignee: (unassigned) => Marian Horban (mhorban)
** Changed in: scorched3d (Ubuntu)
Status: New => In Progress
** Package changed: scorched3d (Ubuntu) => nova
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https://bugs.launchpad.net/bugs/1424756
Title:
nova network on multihost does not delete bridges during deletion of
networks
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