Install the KVM Virtual Machine in CentOS 6

Install the KVM Virtual Machine in CentOS 6

I. KVM Introduction

KVM is an open-source software. It is short for kernel-based virtual machine (kernel-based virtual machine). It is an open-source system virtualization module that is fully virtualized based on hardware, however, hardware support is required (such as Intel VT or amd v ). Linux 2.6.20 and later are integrated into various major Linux Release versions. It uses the Linux Scheduler for management, so compared with Xen, its core source code is few. KVM has become one of the mainstream VMM in the academic field.

Ii. KVM Installation

1. Preparations

• Disable iptables Firewall

• BIOS enabling CPU supports Virtualization (usually enabled by default)

• Check whether the CPU supports full KVM Virtualization

View method:

# Cat/proc/cpuinfo | egrep -- color = always 'vmx | svm '# support for output of information

2. Install virtualization-related software packages

System yum upgrade

# Yum update (or # yum upgrade)

Install virtualization and graphic desktop software package

# Yum-y groupinstall "Virtualization" "Desktop" "X Window System" "Desktop Platform"

Install KVM

# Yum-y installkvmlib1_libvirt-pythonpython-kernel inst virt-manager qemu-kvm-tools virt-viewer virt-v2v

Restart the system after installation.

# Reboot

3. view the loaded KVM Module

# Lsmod | grep kvm

Kvm_intel 55656 6

Kvm 345659 1 kvm_intel

# Stat/dev/kvm

File: "/dev/kvm"

Size: 0 Blocks: 0 IO Block: 4096 character special file

Device: 5 h/5d Inode: 10640 Links: 1 Device type: a, e8

Access: (0666/crw-rw-) Uid: (0/root) Gid: (36/kvm)

Access: 17:20:39. 789558372 + 0800

Modify: 17:20:39. 789558372 + 0800

Change: 17:20:39. 789558372 + 0800

4. view the libmongod running status

#/Etc/init. d/libmongod status

Libmongod (pid 2491) is running...

5. configure network bridging

Backup ifcfg-eth0

# Cp/etc/sysconfig/network-scripts/ifcfg-eth0/root

Create br0

# Cd/etc/sysconfig/network-scripts/

# Cp ifcfg-eth0 ifcfg-br0

View the configuration content. Here, the IP address is automatically obtained,

[Root @ node4 network-scripts] # cat ifcfg-eth0

DEVICE = eth0

TYPE = Ethernet

ONBOOT = yes

NM_CONTROLLED = no

BRIDGE = br0

[Root @ node4 network-scripts] # cat ifcfg-br0

DEVICE = br0

TYPE = Bridge

ONBOOT = yes

NM_CONTROLLED = no

BOOTPROTO = dhcp

6. Restart the network service.

#/Etc/init. d/network restart

3. Install virtual machines

Create two Disk Images for Virtual Machine installation in the/data/vm directory:

# Qemu-img create-f raw/data/vm/vm01.img 10G # For graphical installation of virtual machines

# Qemu-img create-f qcow2/data/vm/vm02.img 10G # used for command line installation of virtual machines

1. Use virt-manager to install virtual machines graphically

Open the application-> System Tools-> Virtual System Manager

Click the create virtual machine button, enter the Virtual Machine name, and click forward,

Select the attached CD and operating system options, and click forward,

Determine the memory and CPU of the VM,

Enable the created storage hard disk for the VM. Click forward,

Next, confirm the VM information. Click Finish to go to the system installation page. The installation steps are not described here.

2. Run the following command to install a VM:

# Virt-install -- virt-type kvm-n vm02-r 1024 -- disk path =/data/vm/vm02.img, size = 10, format = qcow2-w bridge: br0 -- graphics vnc, listen = 0.0.0.0 -- noautoconsole -- OS-type = linux -- OS-variant = rhel6 -- location = http: // 192.168.1.166/centos6

View the port on which the vnc is started

# Virsh vncdisplay vm02

You can view the help information about related parameters,

-- Location: the http service is used as the system installation source, that is, the CD Mount directory is linked to the root directory of the website.

Then, you can use the VNC client software to access the VNC interface, which is the interface for normal system installation.

3. virsh commands for managing virtual machines

Virsh list

Virsh list all

Virsh start vm01

Virsh shutdown vm01

Virsh destroy vm01

View the help information for other commands.

# Virsh-h