KVM virtualization details

KVMVirtualization

The system environment requires a graphical system to be installedKVM

1. Check whether the machine supports virtualization

Check the IntelCPU:cat / proc/cpuinfo | grep --color vmx

View the CPU of AMD: cat /proc/cpuinfo | grep --color svm

The picture below shows the CPU of

Intel

Support virtualization

2. Install the KVM module

[root@localhost ~]# yum -y install kvm virt-manager libvirt virt-viewer

kvm ： KVM Virtualization module

virt-manager： KVM Graphical management tool

libvirt： Virtualization service

virt-viewer: A minimal tool that displays the graphical console of a virtual machine

1)Start KVMService

[root@localhost ~]# service libvirtd start

2）Set auto-start at boot

[root@localhost ~]# chkconfig libvirtd on

3)Make sure it is loaded correctly kvm Module

[root@localhost ~]# lsmod | grep kvm

4) Check KVM If the installation is successful, you can use the virsh command to check the status of the virtual machine

[root@localhost ~]# virsh list

3、Configuration KVM Bridge function

Bridge introduction: What we often callBridge device is actually a bridge device, which is equivalent to now The Layer 2 switch is used to connect all machines in the same network segment, so our purpose is to add the network device eth0 to br0. At this time, br0 becomes the so-called switch device, and the eth0 of our physical machine is also connected to it. .

1) Installation package

[root@localhost ~]# rpm -ivh /mnt/Packages/bridge-utils-1.2-10.el6.x86_64.rpm

2) Tie eth0 to the br0 bridge On the device:

[root@localhost ~]# cd /etc/sysconfig/network-scripts/

#Back up eth0

[root@localhost network-scripts]# cp ifcfg-eth0 /tmp/

#Edit the configuration file to the following content

[root@localhost network-scripts]# vim ifcfg-eth0

DEVICE=eth0

NM_CONTROLLED=yes

IPADDR=192.168.200.111 # Next, these blue contents need to be deleted

NETMASK=255.255.255.0

GATEWAY=192.168.200.1

DNS1=192.168.200.1

ONBOOT=yes

TYPE=Ethernet

BOOTPROTO=none

IPV6INIT =no

USERCTL=no

PREFIX=24

DEFROUTE=yes

IPV4_FAILURE_FATAL=yes

NAME="eth0"

HWADDR=00:0C:29:12:EC:1E

BRIDGE="br0" #Insert this line at the end of the file

3) Make the bridge file

[root@localhost network- scripts]# cp ifcfg-eth0 ifcfg-br0

DEVICE=br0

NM_CONTROLLED=yes

ONBOOT=yes

IPADDR=192.168.200.111

##NETMASK=255.255.255.0

GATEWAY=192.168.200.1

##DNS1=192.168.200.1

BOOTPROTO=none

TYPE=BridgeIPV6INIT=no

USERCTL=no

After configuration, close

NetworkManager, and then restart the network card[root@localhost ~]# service NetworkManager stop

[root@localhost ~]# service network restart

Check

IP address

Upload the image file to the directory /var/lib/libvirt/images/under

Start Remote Desktop

##After turning it on, you can use vnc software to remotely connect to the server

View the bridge information:

[root@localhost ~]# brctl show

Open the virtual machine in

VNC

Terminal Manager[root@localhost ~]# virt-manager

Right-click to create a new virtual machine

Select the image path and installation version

Set the memory size and

CPU

number, followed by VMwareInstallation is similar

## Click Finish to complete the virtual system.

The right side is the same as our installation system

Virtual machine installation completed

Virtual machine configuration

KVM

Common commands for virtual machines

[root@localhost ~]# virsh list #Only display running virtual machines

[root@localhost ~]# virsh list --all

#Display All virtual machines, including closed virtual machines

[root@localhost ~]# virsh start server1 #Start

server

Virtual machine

[root@localhost ~]# virsh shutdown server #Closeserver Virtual machine

Solution shutdown Cannot shut downKVM Problems with virtual machines

After installation KVM Linux Install and start the acpi service in the virtual machine, virsh shutdown The command controls the power of the virtual machine by sending acpi commands, and kvm virtual machine installationlinux # The ## system does not have the acpi service installed by default, so it will not be processed.

Solution: Just install and start the acpid service in the virtual machine. Execute the command as follows:

Configure networkyumSource

Install httpdService on the real machine

[root@localhost ~]# yum -y install httpd

[root@localhost ~]# service httpd start

[root@localhost ~]# mount /dev/cdrom /var/ www/html/

(This is how it is mounted in a virtual machine. On a real machine, you can directly upload the image to the machine and then mount it in the corresponding directory.)

ConfigurationKVMyumSource

[root@ localhost ~]# ssh 192.168.200.112

[root@localhost ~]# cd /etc/yum.repos.d/

[root@localhost yum.repos.d]# vim rhel-source.repo

[root@localhost yum.repos.d]# yum list all

[root @localhost yum.repos.d]# yum -y install acpid

[root@localhost yum.repos.d]# service acpid start

[root@localhost yum.repos.d] # chkconfig acpid on

Test on a real machine

[root@localhost ~]# virsh list

#View running server status

[root@localhost ~]# virsh shutdown server1

#Closeserver1Virtual host

[root@localhost ~]# virsh autostart server1

#Set server1 to After the physical machine is turned on, it will automatically start

[root@localhost ~]# virsh list View Closed

Author: compy　 Date: 2017-07-15 02:16　QQ:2071959367

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