How to set a home server virtualization running centos

And so, the virtualization server that we installed here can be used to run guest operating systems for this we need a KVM. We must first determine whether the processor is our hardware virtualization, go to the console and run the command:

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

If there is a conclusion, it means that your processor supports hardware virtualization, there is the need to put another package servak.Probuem KVM.

yum install kvm libvirt python-virtinst qemu-kvm bridge-utils

Start the daemon libvirtd and add it to autostart

service libvirtd start
chkconfig libvirtd on

And check out how to install

virsh -c qemu:///system list

No errors, then all horosho.Otklyuchim Service Network Manager, and switch to the network manager by default.

service NetworkManager stop

service network start

chkconfig NetworkManager off

chkconfig network on

Now, what would be the guest machine (virtualke) had full access to the network, it is necessary to set up a bridge (bridge) .Ego we do with our active eth0 interface for this add another br0 make a copy of the eth0 interface

cp /etc/sysconfig/network-scripts/ifcfg-eth0 /etc/sysconfig/network-scripts/back.ifcfg-eth0

Open the file for editing and interface eth0 and put the following text

nano /etc/sysconfig/network-scripts/ifcfg-eth0

DEVICE=eth0
TYPE=Ethernet
ONBOOT=yes
NM_CONTROLLED=yes
BRIDGE=br0

Ctrl +O и Ctrl+X

Copy the file to a new backup interface br0.

cp /etc/sysconfig/network-scripts/back.ifcfg-eth0 /etc/sysconfig/network-scripts/ifcfg-br0

Откроем и приведем его к виду

nano /etc/sysconfig/network-scripts/ifcfg-br0

DEVICE=br0
TYPE=Bridge
ONBOOT=yes
NM_CONTROLLED=yes
BOOTPROTO=none
IPADDR=192.168.0.11
GATEWAY=192.168.0.1     # an IP router, firewall, then after someone off the Internet
DNS1=8.8.8.8                            # DSN is google
DOMAIN=                                    #The workgroup name (or domain)
DEFROUTE=yes
IPV6INIT=no
NAME="System br0"

Ctrl +O и Ctrl+X

Significant comments in the text, now it is necessary to restart the grid (if you make a mistake, the console may fall off)

service network restart

ifconfig --show us all of our active interfaces (eth0, br0, lo, virt ....)

You can now create virtualke, but since there is a possibility to do it in the GUI you must first install the GUI to work with Dev execute command

yum install virt-manager libvirt qemu-system-x86 openssh-askpass libcanberra-devel

You can also add

yum install qemu-guest-agent qemu-kvm-tools

The KDE (graphical interface) appear as "Virtual Machine Manager" to them and then we will put virtualke

Before you start creating virtual ok small course tool allows you to work with (* .img) files virtual ok, yes, I create them in files, but do not mark up the space on the disk, the file is convenient, you can copy the move well, etc. Teams increase and decrease the size of the file that respectively virtualke you will create an additional drive, or increase an existing one. We finish the virtual machines associated with variable disk images.

Increase the size of the image. In the case of KVM / QEMU:

qemu-img resize vm.img +5GB

This will add the 5 GB. to the size of the virtual disk.

With decreasing a little more complicated. you first need to virtualke free up disk space, reduce the drive means virtualke and then run the above command, replace only a plus to minus, or no sign, experiment, I do not remember.

There are still a team qemu-img convert which can convert to different formats (img, qcow2 .....).

Continue going to the GUI and run the "Virtual Machine Manager", will put Windows 10, microsoft announced that it can be installed for free, we go here and swing you want us to image (I recommend to start with (32-bit (x86) version)) I He puts it.