I have had this issue at times and reinstalling everything works for me.
$ sudo apt-get remove openvswitch-datapath-dkms openvswitch-common
openvswitch-switch
$ sudo apt-get install openvswitch-datapath-dkms openvswitch-common
openvswitch-switch
Just verified with Hitesh, it worked for him too.
Deepak
On Wed, Mar 14, 2012 at 1:17 AM, hitesh wadekar
<hitesh.wade...@gmail.com> wrote:
> Hi Piyanai,
>
> Thank you very much for the overview of the OVS. It is really helpful to
> understand the working of OVS and its kernel module. I was looking for it.
>
> Yes you are right it is an already existence bridge (Linux bridge) problems
> that OVS tried to removed it, but it failed.
>
> However, to overcome to this problem, I will have to remove existence Linux
> created bridge. But the problem is If I deleted the instance of the
> Ethernet bridge (Linux), the network interface corresponding to the bridge
> will be down. Considering this case in mind, first we need to download the
> OVS packages manually, then we need to delete Linux bridge and after that we
> need to install OVS package. Once OVS packages have been Installed
> successfully then we need to create bridge using OVS commands.
>
> I hope these all steps will work. I am going to test this soon.
>
> I am wondering, How these steps have been handled in DevStack script?
>
> Dan, David and Brad, Could you please correct me if I am wrong?
>
> Thanks all for your valuable input.
>
> I will try above first and will let you know the result about it.
>
> Thanks and enjoy,
> Hitesh Wadekar
>
>
>
> On Mon, Mar 12, 2012 at 7:10 PM, Piyanai Saowarattitada <pns...@gmail.com>
> wrote:
>>
>> Hi Hitesh,
>>
>> > Setting up openvswitch-switch (1.2.0-1ubuntu3) ...
>> > FATAL: Module openvswitch_mod not found.
>> > * Inserting openvswitch module
>> > * not removing bridge module because bridges exist (br100 virbr0)
>>
>> I interpret this as that the attempt to remove (Linux) "bridge" kernel
>> module was made, but it failed because there existed module
>> dependency, i.e. "br100" and "virbr0". Perhaps, "br100" and "virbr0"
>> were created using the Linux "bridge" kernel module rather than the
>> OpenVswitch (OVS) "brcompat_mod" kernel module.
>> Judging from the "FATAL" Module openvswitch_mod not found", my guess,
>> is that the system did not have OVS installed before invoking
>> DevStack.
>>
>> Try removing br100 and virbr0 first and add them back once the OVS
>> installation is successfully done ?
>> You could use "brctl delbr"...
>>
>> Note that I only use OVS for a few weeks, but this is my understanding...
>> OVS has its own bridge kernel module, "brcompat_mod" which could be
>> installed as part of OVS installation. To OVS users, "brcompat_mod"
>> kernel module performs what the default (Linux) "bridge" kernel module
>> does. In order to install the "brcompat_mod" kernel module, the
>> default "bridge" module needs to be removed first. This implies that
>> any bridge created using the "bridge" kernel module, would need to be
>> deleted ("brctl delbr") before the "bridge" kernel module can be
>> removed. Once OVS is installed successfully, and both
>> "openvswitch_mod" and "brcompat_mod" are loaded into the kernel, your
>> previously created bridges, br100 for example, can be recreated using
>> the "brcompat_mod" kernel module (transparently) via "ovs-vsctl" or
>> "brctl" shell commands.
>>
>> Btw, I also found that the "brcompat_mod" does not automatically load
>> 802.1q (VLAN) kernel module. Thus, if you plan to have a VLAN
>> interface on your bridge, you would have to load the "8021q" kernel
>> module manually after the "brcompat_mod" is loaded.
>>
>> All of these kernel modules, "bridge", "openvswitch_mod",
>> "brcompat_mod" and "8021q" are dynamically loadable kernel modules
>> i.e. they can be loaded/unloaded at will using "insmod" or
>> "modprobe"...
>>
>> To install OVS manually, I use the "INSTALL.*" instruction files at
>> the top level directory in the OVS distribution tarball...
>> I also found both http://openvswitch.org/support/ - click the
>> hypervisor/scenario of choice, and the discussion archive at
>> http://openvswitch.org/pipermail/discuss/ helpful.
>>
>> HTH,
>> Piyanai
>>
>> On Mon, Mar 12, 2012 at 3:17 PM, hitesh wadekar
>> <hitesh.wade...@gmail.com> wrote:
>> > Hello Friends,
>> >
>> > I want to fix the "Quantum Starter Bugs"
>> > (http://wiki.openstack.org/QuantumStarterBugs) . For this, I have
>> > enabled
>> > the quantum service in the DevStack script to install and run Quantum (
>> > added commands in ENABLE_SERVICE). However, while running the script I
>> > got
>> > these errors for Openvswitch (OVS).
>> >
>> > 0 upgraded, 0 newly installed, 0 to remove and 57 not upgraded.
>> > 1 not fully installed or removed.
>> > After this operation, 0 B of additional disk space will be used.
>> > Setting up openvswitch-switch (1.2.0-1ubuntu3) ...
>> > FATAL: Module openvswitch_mod not found.
>> > * Inserting openvswitch module
>> > * not removing bridge module because bridges exist (br100 virbr0)
>> > invoke-rc.d: initscript openvswitch-switch, action "start" failed.
>> > dpkg: error processing openvswitch-switch (--configure):
>> > subprocess installed post-installation script returned error exit
>> > status 1
>> > No apport report written because MaxReports is reached already
>> > Errors
>> > were
>> > encountered while processing:
>> > openvswitch-switch
>> > E: Sub-process /usr/bin/dpkg returned an error code (1)
>> > ++ failed
>> > ++ local r=100
>> > ++ set +o xtrace
>> >
>> > Also, I tried to install openvswitch manually, but had no luck !!.
>> >
>> > On the net I found that there is a bug for openvswitch (Ubuntu Oneiric)
>> > package (
>> > https://bugs.launchpad.net/ubuntu/+source/openvswitch/+bug/894754
>> > )
>> >
>> > I am sure somebody would have already been come across this bug, any
>> > commands or steps that I need follow to install openvswitch on ubuntu
>> > oneric?
>> >
>> > Any input on this is highly appreciated.
>> >
>> > Thanks for your time.
>> >
>> > Thanks,
>> > Hitesh Wadekar
>> > hitesh.wade...@gmail.com
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> > _______________________________________________
>> > Mailing list: https://launchpad.net/~openstack
>> > Post to : openst...@lists.launchpad.net
>> > Unsubscribe : https://launchpad.net/~openstack
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>> >
>
>
>
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--
Deepak Garg,
Data Center and Cloud Div.
Citrix R&D, India
Skype-id: deepakgarg.iit
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