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From Vadim Kimlaychuk <Vadim.Kimlayc...@Elion.ee>
Subject RE: cloudstack kvm openvswitch
Date Mon, 01 Jun 2015 07:31:02 GMT
Hello Ignazio,

           I haven't been working with KVM and OVS for a while, but my previous experience
with this plugin was unlucky. I will put some personal thoughts here and do not pretend to
be 100% correct in all the points:
           1. There is a number of OVS versions and which one(s) are officially supported
-- don't know. Documentation said that is 1.9 (if you patch it), but I have successfully used
2.x versions without errors. Think documentation is outdated. Still  I was not sure that it
is properly supported at CS level.
           2. There are number of problems with plugin activation since 4.4 version. Look
here for example: https://issues.apache.org/jira/browse/CLOUDSTACK-7446  
           3. I've been using OVS with VLAN isolation and have seen it is working with CS
properly. What does exactly do "plugin activation" - don't know. May be plugin should put
some more network offers. But since it was broken I was not able to test it.
           4. Didn't try GRE. Have nothing to say here.
           5. The overall feeling -- this functionality is not yet mature.  I also lacks documentation.
Take it on your own risk

Regards,

Vadim 

-----Original Message-----
From: Ignazio Cassano [mailto:ignaziocassano@gmail.com] 
Sent: Saturday, May 30, 2015 12:33 PM
To: users@cloudstack.apache.org; remi@remi.nl
Subject: Re: cloudstack kvm openvswitch

Hi guys, last week we tried to install cloudstack 4.5.1  with two kvm nodes defining an advanced
zone with gre isolation.
Ovs never appears on network service providers but guests vlan are automatically created on
ovs.
Since gre tunnel between nodes has not automatically generated , we set up it manually and
now  VMs can communicate between nodes.
Why ovs does not appear in network service provider panel ?
It should not appear if  "vlan isolation" was been choosen in configuration but we choose
gre!
Why gre tunnel was not generated ?
Another question is related to the availability of ovs controllers ?
Has anyone tried to configure any  opensource openvswitch controller with cloudstack ?
Many thanks
Ignazio
Il giorno 24/apr/2015 10:50, "Remi Bergsma" <remi@remi.nl> ha scritto:

> Hi,
>
> I recently worked on KVM with Open vSwitch, but controlled by NSX (aka 
> Nicira). Apart from the controller and some settings, it should be the 
> same.
>
> Some pointers:
> http://docs.cloudstack.apache.org/en/latest/networking/ovs-plugin.html
> https://cwiki.apache.org/confluence/display/CLOUDSTACK/KVM+with+OpenVS
> witch
>
> http://blog.remibergsma.com/2015/04/04/adding-a-kvm-cluster-with-nsx-n
> etworking-to-cloudstack/
> (skip the NSX stuff)
>
> It is not needed anymore to compile ovs yourself. I worked with 
> CentOS6 and
> 7 and Ubuntu 14.04 out of the box. There is some extra work to get STT 
> to work, but since you do use GRE instead you can ignore it.
>
> This is a script I wrote to help setup KVM/OVS/CloudStack in my lab to 
> be able to do quick POCs. It could help you too in setting up the 
> bridges and
> interfaces:
> https://github.com/remibergsma/openvswitch-kvm-config
>
> To answer your question about the tunnels: in my case they are created 
> on the fly. I would just give it a go and see if ovs creates any tunnels.
>
> Hope this helps.
>
> Regards,
> Remi
>
>
>
> 2015-04-24 7:50 GMT+02:00 Ignazio Cassano <ignaziocassano@gmail.com>:
>
> > Thanks a lot.
> > What I need to know is how I must prepare kvm nodes for openvswitch: 
> > for example if I must create a gre tunnel between nodes or if it is 
> > enough adding an address on each openvswitch  bridge.
> > Regards
> > Il giorno 24/apr/2015 06:22, "Sanjeev N" <sanjeev@apache.org> ha
> scritto:
> >
> > > Hi ,
> > >
> > > We can't avoid configuring vlans on physical switched even if we 
> > > use
> OVS
> > > instead of bridge more on KVM. One option would be to use GRE 
> > > isolation instead of VLAN based in creating Physical network in a zone.
> > >
> > > -Sanjeev
> > >
> > > On Thu, Apr 23, 2015 at 4:05 PM, Ignazio Cassano <
> > ignaziocassano@gmail.com
> > > >
> > > wrote:
> > >
> > > > Hi all,
> > > > I would like to install a new cloudstack infrastracture with kvm
> nodes
> > > but
> > > > I also would like to use OVS to configure guests vlan avoiding 
> > > > to
> > > configure
> > > > them on
> > > > physical switches.
> > > > I am planning to user three kvm nodes but I do not know how 
> > > > prepare
> > them
> > > to
> > > > use OVS: must I create a gre tunnel between nodes ?
> > > > Regards
> > > >
> > >
> >
>
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