4 easy steps of kvm installation in Ubuntu 16.4

4 easy steps of kvm installation in Ubuntu 16.4



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KVM stands for Kernel Based Virtual Machine. It's a virtualisation software. kvm provides ability to run a multiple guest operating systems with the help of hardware virtualization extensions.

KVM managed by Virt-Manager (Virtual Machine Manager) it supports creating, editing, starting, and stopping KVM-based virtual machines.

Step 1:

Pre-installation checklist

Check that your CPU supports hardware virtualization

egrep -c '(vmx|svm)' /proc/cpuinfo

kvm.png

If 0 it means that your CPU doesn't support hardware virtualization.
If 1 or more it does - but you still need to make sure that virtualization is enabled in the BIOS.

OR-->
kvm-ok
which may provide an output like this:

INFO: /dev/kvm exists
KVM acceleration can be used

kvn1.png

If you see :

INFO: Your CPU does not support KVM extensions
KVM acceleration can NOT be used

To see if your processor is 64-bit Or 32-bit, you can run this command:
egrep -c ' lm ' /proc/cpuinfo
 kvm2.png

If 0 is printed, it means that your CPU is not 64-bit.
If 1 or higher, it is. Note: lm stands for Long Mode which equates to a 64-bit CPU.

Now see if your running kernel is 64-bit, just issue the following command:

uname -m

kvm3.png

x86_64 indicates a running 64-bit kernel. If you use see i386, i486, i586 or i686, you're running a 32-bit kernel.

Note: x86_64 is synonymous with amd64.

Step 2

Installation KVM

Install Necessary Packages

apt-get install qemu-kvm qemu bridge-utils virtinst libvirt-bin virt-manager virt-viewer cpu-checker  

Step 3

Configure bridged networking

backup interface file :

cp /etc/network/interfaces /etc/network/interfaces.backup
vi /etc/network/interfaces

# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback

auto eth0
iface eth0 inet manual

auto br0
iface br0 inet static
        address 172.17.20.110
        netmask 255.255.0.0
          gateway 172.17.25.1
        bridge_ports eth0
        bridge_stp off
        bridge_fd 0
        bridge_maxwait 0
kvm4.png

Restart the networking service, OR reboot system to take effact enter:

systemctl restart networking

   Or
reboot

Check bridge

brctl show

kvm5.png

bridge name    bridge id       STP enabled    interfaces
br0       8000.0800279ac61a    no       enp0s3

Step 4

Create Virtual Machine

In this tutorial i install  centos 7 minimal, you can download from “https://mirrors.kernel.org/centos/7.3.1611/isos/x86_64/

mkdir /iso

wget https://mirrors.kernel.org/centos/7.3.1611/isos/x86_64/CentOS-7-x86_64-Minimal-1611.iso

CREATE CENTOS 7 VM

Method - 1 : Terminal Mode:

In this example, I’m creating CentOS 7 VM with 1GB RAM, 1 CPU core, 1 nics and 16 GB disk space, enter:
virt-install --name=CentOS7 --ram=1024 --vcpus=1 --cdrom=/iso/CentOS-7-x86_64-Minimal-1611.iso --os-type=linux --os-variant=rhel7 --network bridge=br0 --graphics=spice --disk path=/var/lib/libvirt/images/centos7-minimal.qcow2,size=16

kvm6.png

--name        –  Name of the Virtual machine
--ram        –  Memory size in MB
--vcpus    –  Virtual cpu’s in numbers
--cdrom    –  Location of the ISO image
--os-type    –  OS type like Linux, Windows and Unix
--os-variant    –  OS variant like rhel 6, solaris, windows
--network    –  networking
--graphics    –  display settings
--disk path    –  image store location of the disk with size of 16 GB

A new virt-viewer window will be open,Now you can install your centos

kvm7.png

Method -2 : Graphical Mode:

Type the following command in terminal in GUI mode.

virt-manager
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1. Press “Create a new virtual machine”  kk.png icon - new window will open

   Here i choose "Local Install Media ( ISO image or CD-ROM ).  & Press  “Forward”

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2. Locate your install media :

kvm03.png
  
Press Browse Button → Browse Local → Select path of  ISO file
kvm05.png

Press “Forward”

3. Choose memory & cpu

kvm07.png
 
here i set 1GB ram and 1 Core  & Press “Forward”

4. Create disk image/volume for virtual machine

kvm08.png


Here i set 16GB  disk Space for VM & Press “Forward”

5. Ready to be install

kvm09.png

Type os name - < any name > & Press  “Finish”

6. a new window will open for installation of os

kvm010.png

Enjoy !



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