[ovs-discuss] Issue: rmmod: ERROR: the Module openvswitch is in use

[Kavanagh, Mark B]

>
>Hi everyone,
>I'm asking for assistance to fix this issue:“rmmod: ERROR: Module openvswitch is in use”
>
>I found unloading openvswitch. Ko, appear "rmmod: ERROR: the Module openvswitch is in use"
>
>Lsmod see at this time::
>=============================================================================================
>===========================================================
>root at ubuntu:/home/ych/zr9101/host/ovs/openvswitch-2.6.1# lsmod |grep open
>Module                  Size  Used by
>openvswitch           225280  1
>nf_nat_ipv6            16384  1 openvswitch
>nf_defrag_ipv6         36864  2 openvswitch,nf_conntrack_ipv6
>gre                    16384  1 openvswitch
>libcrc32c              16384  1 openvswitch
>octnic                 61440  1 openvswitch
>nf_nat_ipv4            16384  2 openvswitch,iptable_nat
>nf_nat                 24576  4 openvswitch,nf_nat_ipv4,nf_nat_ipv6,nf_nat_masquerade_ipv4
>nf_conntrack          106496  8 openvswitch,nf_nat,nf_nat_ipv4,nf_nat_ipv6,xt_conntrack,nf_na
>t_masquerade_ipv4,nf_conntrack_ipv4,nf_conntrack_ipv6
>=============================================================================================
>===========================================================
>
>Why used is not zero?,Is this a bug

Try this before attempting to remove the module:
	
	$OVS_DIR/utilities/ovs-dpctl del-dp system at ovs-system 

Cheers,
Mark

>
>
>Below is the steps：
>1、insmod openvswitch modules
> sudo modprobe gre
> sudo modprobe nf_conntrack
> sudo modprobe nf_defrag_ipv4
> sudo modprobe nf_nat_ipv4
> sudo modprobe nf_nat
> sudo modprobe libcrc32c
> sudo modprobe nf_defrag_ipv6
> sudo modprobe nf_nat_ipv6
>
> sudo insmod $OVS_DIR/datapath/linux/openvswitch.ko
> sudo insmod $OVS_DIR/datapath/linux/vport-geneve.ko
> sudo insmod $OVS_DIR/datapath/linux/vport-gre.ko
> sudo insmod $OVS_DIR/datapath/linux/vport-lisp.ko
> sudo insmod $OVS_DIR/datapath/linux/vport-stt.ko
> sudo insmod $OVS_DIR/datapath/linux/vport-vxlan.ko
>
>
>2、Initialize and start ovs
> sudo rm -rf /usr/local/etc/openvswitch
> sudo mkdir -p /usr/local/etc/openvswitch
> sudo ovsdb-tool create /usr/local/etc/openvswitch/conf.db ./vswitch.ovsschema
>
> #start configuration database
> sudo ovsdb-server --remote=punix:/usr/local/var/run/openvswitch/db.sock \
>       --remote=db:Open_vSwitch,Open_vSwitch,manager_options \
>       --private-key=db:Open_vSwitch,SSL,private_key \
>       --certificate=db:Open_vSwitch,SSL,certificate \
>       --bootstrap-ca-cert=db:Open_vSwitch,SSL,ca_cert \
>       --pidfile --detach
>
> #initialize the database
> sudo ovs-vsctl --no-wait init
>
> #start the main Open vSwitch daemon
> sudo ovs-vswitchd --pidfile --detach --log-file=/var/log/ovs-vswitchd.log
>
>
>3、add br and add port
> sudo ovs-vsctl add-br br0
> sudo ovs-vsctl add-port br0 ens39
> sudo ifconfig ens39 0
> sudo ifconfig br0 192.168.230.130/24
>
>4、del port and del br
> sudo ovs-vsctl del-port ens39
> sudo ovs-vsctl del-br br0
>
>5、Stop the Open vSwitch daemons
> kill `cd /usr/local/var/run/openvswitch && cat ovsdb-server.pid ovs-vswitchd.pid`
>
>6、rmmod openvswitch fail
> sudo rmmod openvswitch.ko
>
>appear "rmmod: ERROR: the Module openvswitch is in use"
>
>
>
>Best wishes!