Comments on Virtualization With KVM On Ubuntu 8.10

Virtualization With KVM On Ubuntu 8.10 This guide explains how you can install and use KVM for creating and running virtual machines on an Ubuntu 8.10 server. I will show how to create image-based virtual machines and also virtual machines that use a logical volume (LVM). KVM is short for Kernel-based Virtual Machine and makes use of hardware virtualization, i.e., you need a CPU that supports hardware virtualization, e.g. Intel VT or AMD-V.

4 Comment(s)

Add comment

Please register in our forum first to comment.

Comments

By: Jim Dennis
Reply  

 

The first problem I encountered while going through this HOWTO was in trying to follow the example for the configuration of br0 in the /etc/network/interfaces examples.

Like many readers my existing configuration was being managed by NetworkManager ... and is using DHCP.  Naturally my attempt to follow the example past this point (thinking I was creating a new virtual network and chosing an suitable RFC1918 block of static addresses to assign to that) left my system disconnected from the 'net.

It appears that all I needed to do was:

  1. Add an entry for eth0 identifying it as "inet manual" (presumably meaning: "managed by the bridge-utils").
  2. Replace all the static addressing directives in the example with  an "inet dhcp" entry for br0
     

The results look like:

auto br0
iface   br0     inet    dhcp
        bridge_ports eth0
        bridge_fd 9
        bridge_hello 2
        bridge_maxage 12
        bridge_stp off

iface   eth0    inet manual
        # managed by bridge-utils?

Perhaps adding an alternative for those on DHCP and a link to the best info we can find on bridge-utils would help.

 The best info I was able to find so far is at: LinuxFoundation: Net:Bridge. But I didn't have to dive far into it before I figured out what I was supposed to be doing by taking a closer look at the before and "after" examples.

 I hope the maintainer of this HOWTO will read this.

 

 

By:
Reply  

If virtualization does not show up after

egrep '(vmx|svm)' --color=always /proc/cpuinfo

 You may have to enable virtualization in the bios, I have found that this function is disabled by default in Dell servers and may also be in others.

By: Matt Mossholder
Reply  

Canonical recommends that you not use the following:

  • sudo su
  • sudo /bin/<insert shell here>
  • ...etc.

The recommended way of getting a root shell is:

sudo -i

 

    --Matt

 

By: Tom
Reply  

Nice article. Very good explanations.

There are a lot management tools will make KVM deployment much easier:
http://www.linux-kvm.org/page/Management_Tools

Since IBM and Redhat start to support KVM, many companies are deploying KVM cloud farms now.