I had a similar problem. OVS loads perfectly along with brcompat after a fresh install on Ubuntu 12.04. But when the machine reboots your bridge kernel module is back and causes conflict when OVS tries to start/load. This is because bridge-utils is still installed on the machine as Ubunutu views it as a dependency for KVM. I tried 'rmmod bridge' as suggested below, and that allows me to then manually load OVS with no problem. But that's not a permanent fix -- reloading the machine again brings us back to square one. So here is what I did...
This may not be the perfect solution but here is what seems to have worked for me. Edit */etc/init.d/openvswitch-switch* Prepend the file with this line: *rmmod bridge* * * Your OVS install will persist happily across reboots. The only less than perfect thing I have observed so far from doing this is that when you run *service openvswitch-switch status* -- you will see an error message: *ERROR: Module bridge does not exist in /proc/modules* I think that's just because the *rmmod bridge* statement you added in /etc/init.d/openvswitch-switch runs again. So that "ERROR" message is innocuous and can be ignored. But perhaps there is a better way than this band-aid... Cheers, Brad On Sun, Nov 18, 2012 at 11:57 AM, Ben Pfaff <[email protected]> wrote: > On Sun, Nov 18, 2012 at 10:55:52PM +0700, hasan mustafa wrote: > > i'm succesfully install Open vSwitch on Ubuntu 12.04. however i get some > > problem, when i reboot my machine, and i try to start open vswitch > service, > > i get some error > > > > /etc/init.d/openvswitch-switch start > > FATAL: Error inserting brcompat_mod > > (/lib/modules/3.2.0-33-generic-pae/kernel/brcompat_mod.ko): Invalid > module > > format > > * Inserting brcompat module > > Module has probably not been built for this kernel. > > For instructions, read > > /usr/share/doc/openvswitch-datapath-source/README.Debian > > FATAL: Error inserting brcompat_mod > > (/lib/modules/3.2.0-33-generic-pae/kernel/brcompat_mod.ko): Invalid > module > > format > > * Inserting brcompat module > > Here's the advice from INSTALL: > > 6. If you built kernel modules, you may load them with "insmod", e.g.: > > % insmod datapath/linux/openvswitch.ko > > You may need to specify a full path to insmod, e.g. /sbin/insmod. > To verify that the modules have been loaded, run "/sbin/lsmod" and > check that openvswitch is listed. > > If the "insmod" operation fails, look at the last few kernel log > messages (e.g. with "dmesg | tail"): > > - The message "openvswitch: exports duplicate symbol > br_should_route_hook (owned by bridge)" means that the bridge > module is loaded. Run "/sbin/rmmod bridge" to remove it. > > If "/sbin/rmmod bridge" fails with "ERROR: Module bridge does > not exist in /proc/modules", then the bridge is compiled into > the kernel, rather than as a module. Open vSwitch does not > support this configuration (see "Build Requirements", above). > > - The message "openvswitch: exports duplicate symbol > dp_ioctl_hook (owned by ofdatapath)" means that the ofdatapath > module from the OpenFlow reference implementation is loaded. > Run "/sbin/rmmod ofdatapath" to remove it. (You might have to > delete any existing datapaths beforehand, using the "dpctl" > program included with the OpenFlow reference implementation. > "ovs-dpctl" will not work.) > > - Otherwise, the most likely problem is that Open vSwitch was > built for a kernel different from the one into which you are > trying to load it. Run "modinfo" on openvswitch.ko and on > a module built for the running kernel, e.g.: > > % /sbin/modinfo openvswitch.ko > % /sbin/modinfo /lib/modules/`uname > -r`/kernel/net/bridge/bridge.ko > > Compare the "vermagic" lines output by the two commands. If > they differ, then Open vSwitch was built for the wrong kernel. > > - If you decide to report a bug or ask a question related to > module loading, please include the output from the "dmesg" and > "modinfo" commands mentioned above. > _______________________________________________ > discuss mailing list > [email protected] > http://openvswitch.org/mailman/listinfo/discuss >
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