cloudstack-users mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Abu Bashiri <>
Subject RE: KVM in advanced zone - some open questions
Date Fri, 22 Nov 2013 08:16:24 GMT
Hey Shanker,

many thanks for your fast reply and your detailed answers. Maybe you can
answer some additional questions?

In the install documentation on point 8.1.5.Is the libvirt configuration
only needed if I want to do live migration or shall I configure this always?

Regarding the Bridge config. That's really interesting. Because I thought I
have to configure a bridge for every traffic type, even for my public
traffic which is on a VLAN. 
So I just set the traffic label on all to cloudbr0 and cloudstack creates it
automatically, but regarding public-traffic, iam right that I shall not
specifiy a VLAN ID in the create zone wizard
Because my interface is already configured as a vlan interface?!?!

-----Original Message-----
From: Shanker Balan [] 
Sent: Donnerstag, 21. November 2013 03:46
To: CloudStack-Users
Subject: Re: KVM in advanced zone - some open questions

Comments inline.

On 20-Nov-2013, at 9:28 pm, Abu Bashiri <> wrote:

> Gents,
> i plan to implement CS 4.2 as a dev environment. I already had a look 
> at the documentation but I still have some unanswered questions. I 
> really appreciate any help.

Glad to hear you have chosen ACS for your dev environment.

> I have three centos 6.3 KVM hosts. One for the management server and 
> the database and the other two hosts are for the VMs.
> My questions are:
> 1.       Are there a guide for the necessary preparation steps for KVM? Or
> is it just really a plain yum install of the kvm components and then a 
> installation of the agent?

Plain yum install along with the OS setup, networking changes and
libvirt/qemu configuration which is mentioned in the host installation docs.

> 2.       Networking
> My physical servers have only two interfaces. I already configured a 
> bond (mode 4 - LACP) for them. As already mentioned, I plan to use 
> advanced networking. For that I configured three VLANs / subnetworks. 
> The management network is set to untagged and is direct connected to the
physical bond.


> 1.       Storage bond0.100
> As far as I understand, that's outside of CS management. It just has 
> to be present so that the mount of NFS export is working? Is this 
> right? Need I a bridge for this VLAN?

CloudStack uses traffic labels to determine the NIC to use. In the case of
KVM, the traffic label map to the "cloudbr" interface.

So, create "cloudbr0" and which maps to the bond0 interface. Since you have
only one bond, all traffic labels would point to "cloudbr0" in your case.

> 2.       Public bond0.40
> So as far as I understand, I need Guest as well but iam not sure if I 
> need a bridge? If iam right, cloudstack will create the bridges for guest

Yes, cloudstack will create the bridge for the guests. Once you have
specific the traffic label (cloudbr0 in your case since you have only one
bond), the bridges will get created to bond0.

> And what is the right order? Install the agent and then add to 
> cloudstack or shall I first configure the bridges, then set them in 
> and then add it to CS?

First configure your LACP, bond0 and cloudbr0. Once your networking is
ready, add the host to ACS.

> Sorry for the stupid questions.




M: +91 98860 60539 | O: +91 (80) 67935867 | | Twitter:@shapeblue ShapeBlue Services India LLP, 22nd
floor, Unit 2201A, World Trade Centre, Bangalore - 560 055

CloudStack Bootcamp Training on 27/28 November, Bangalore

This email and any attachments to it may be confidential and are intended
solely for the use of the individual to whom it is addressed. Any views or
opinions expressed are solely those of the author and do not necessarily
represent those of Shape Blue Ltd or related companies. If you are not the
intended recipient of this email, you must neither take any action based
upon its contents, nor copy or show it to anyone. Please contact the sender
if you believe you have received this email in error. Shape Blue Ltd is a
company incorporated in England & Wales. ShapeBlue Services India LLP is a
company incorporated in India and is operated under license from Shape Blue
Ltd. Shape Blue Brasil Consultoria Ltda is a company incorporated in Brasil
and is operated under license from Shape Blue Ltd. ShapeBlue is a registered

View raw message