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
> >
> >
> >
> >
> >
> >
> >
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