Virtualization with KVM on Ubuntu12.04LTS Server

This article explains how to install and use KVM to create and run virtual machines on the Ubuntu12.04LTS server. I will introduce how to create an image-based Virtual Machine and how to create a virtual machine using a logical volume (LVM. KVM is a kernel-based virtual machine that fully utilizes hardware virtualization technology. That is to say, you need to support hardware virtualization processors, such as Intel VT or AMD-V. I do not guarantee that the steps described in this article are applicable to your situation! 1. Home Page notes I use the host name in this article

This article explains how to install and use KVM to create and run virtual machines on the Ubuntu 12.04 LTS server. I will introduce how to create an image-based Virtual Machine and how to create a virtual machine using a logical volume (LVM. KVM is a kernel-based virtual machine that fully utilizes hardware virtualization technology. That is to say, you need to support hardware virtualization processors, such as Intel VT or AMD-V.

I do not guarantee that the steps described in this article are applicable to your situation!

1. Home Page notes

In this article, I use the host name server1.example.com and the IP address 192.168.0.100 as the KVM host.

Because we will run all the steps described in this article with the root user permission (root privilege), we can use the string sudo to prefix all the commands in this tutorial, or just enter the following command, become the root user immediately.

Sudo su

2. Install KVM and vmbuilder

First, check whether your processor supports hardware virtualization. If yes, run the following command:

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

The following content should be displayed:

Root @ server1 :~ # Egrep '(vmx | svm)' -- color = always/proc/cpuinfo

Flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat limit 36 clflush

Mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt rdtscp lm 3 dnowext 3 dnow rep_good nopl extd_apicid

Pni cx16 lahf_lm cmp_legacy svm extapic cr8_legacy 3 dnowprefetch lbrv

Flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat limit 36 clflush

Mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt rdtscp lm 3 dnowext 3 dnow rep_good nopl extd_apicid

Pni cx16 lahf_lm cmp_legacy svm extapic cr8_legacy 3 dnowprefetch lbrv

Root @ server1 :~ #

If nothing is displayed, your processor does not support hardware virtualization. You must stop here.

To install KVM and vmbuilder (create a script for a Ubuntu-based Virtual Machine), run:

Apt-get install ubuntu-virt-server python-vm-builder kvm-ipxe

Then, we must add the user as the current login user (Root User) to the group libmongod:

Adduser 'id-UN' libmongod

Adduser 'id-UN' kvm

You need to exit and log on again so that the new group membership takes effect.

Check whether KVM is successfully installed and run

Virsh-c qemu: // system list

The displayed content should be like this:

Root @ server1 :~ # Virsh-c qemu: // system list

Id Name State

----------------------------------

Root @ server1 :~ #

If it shows an error, what is wrong.

Next, we need to build a bridge on the server so that we can access our virtual machine from other hosts, as if the virtual machine is a physical system in the network.

To this end, we have installed the package bridge-utils ......

Apt-get install bridge-utils

Configure the bridge. Open/etc/network/interfaces:

Vi/etc/network/interfaces

Before the change, my file looks like the following:

# This file describes available network interfaces on the system,

# And how to activate these network interfaces. For more information, see interface (5 ).

# Delivery network interface

Auto lo

Iface lo inet loopback

# Primary Network Interface

Auto eth0

Iface eth0 inet static

Address 192.168.0.100

Netmask 255.255.255.0

Network 192.168.0.0

Broadcast 192.168.0.255

Gateway 192.168.0.1

Dns-nameservers 8.8.8.8 8.8.4.4