unstack couldn't unload openvswitch module

[Shlomo]

The openvswitch couldn't unloaded while running ./unstack.
The error I got: modprobe: FATAL: Module openvswitch is in use.

The proposed solution is to unload the vport_vxlan or geneve before trying to unload openvswitch (e.g. sudo rmmod vport_vxlan):
/opt/stack/dragonflow/devstack/ovs_setup.sh:_neutron_ovs_install_ovs:108

Log:

2016-05-16 08:20:14.828 | ++/opt/stack/dragonflow/devstack/ovs_setup.sh:_neutron_ovs_install_ovs:107 test -n 'openvswitch 233472 1 vport_vxlan
2016-05-16 08:20:14.828 | nf_defrag_ipv6 36864 1 openvswitch
2016-05-16 08:20:14.828 | gre 16384 1 openvswitch
2016-05-16 08:20:14.828 | libcrc32c 16384 2 xfs,openvswitch
2016-05-16 08:20:14.829 | nf_defrag_ipv4 16384 2 openvswitch,nf_conntrack_ipv4
2016-05-16 08:20:14.829 | nf_conntrack 106496 7 openvswitch,nf_nat,nf_nat_ipv4,xt_conntrack,nf_nat_masquerade_ipv4,nf_conntrack_netlink,nf_conntrack_ipv4'
2016-05-16 08:20:14.835 | ++/opt/stack/dragonflow/devstack/ovs_setup.sh:_neutron_ovs_install_ovs:108 sudo modprobe -r openvswitch
2016-05-16 08:20:14.842 | modprobe: FATAL: Module openvswitch is in use.
2016-05-16 08:20:14.850 | +/opt/stack/dragonflow/devstack/ovs_setup.sh:_neutron_ovs_install_ovs:1 exit_trap
2016-05-16 08:20:14.856 | +./stack.sh:exit_trap:473 local r=1
2016-05-16 08:20:14.863 | ++./stack.sh:exit_trap:474 jobs -p
2016-05-16 08:20:14.870 | +./stack.sh:exit_trap:474 jobs=
2016-05-16 08:20:14.876 | +./stack.sh:exit_trap:477 [[ -n '' ]]
2016-05-16 08:20:14.883 | +./stack.sh:exit_trap:483 kill_spinner
2016-05-16 08:20:14.890 | +./stack.sh:kill_spinner:369 '[' '!' -z '' ']'
2016-05-16 08:20:14.896 | +./stack.sh:exit_trap:485 [[ 1 -ne 0 ]]
2016-05-16 08:20:14.903 | +./stack.sh:exit_trap:486 echo 'Error on exit'
2016-05-16 08:20:14.903 | Error on exit
2016-05-16 08:20:14.910 | +./stack.sh:exit_trap:487 generate-subunit 1463386642 172 fail
2016-05-16 08:20:15.114 | +./stack.sh:exit_trap:488 [[ -z /opt/stack/logs ]]
2016-05-16 08:20:15.121 | +./stack.sh:exit_trap:491 /home/stack/devstack/tools/worlddump.py -d /opt/stack/logs
2016-05-16 08:20:15.460 | +./stack.sh:exit_trap:497 exit 1

[Li Ma (nick-ma-z)]

zhang lei: are you working on it? I'd like to fix it asap, because my devstack failed every time.

[Hong Hui Xiao (xiaohhui)]

This is actually a duplicated bug of bug 1555001.