Centos6.5 installation and deployment of KVM

1. Introduction to KVM

KVM is open source software, the full name is kernel-based virtualmachine (kernel-based virtual machine), is an open source system virtualization module, based on hardware full virtualization, but requires hardware support (such as Intel VT technology or AMD V technology). Since Linux 2.6.20, it has been integrated in all major Linux distributions. It uses Linux's own scheduler for management, so compared to Xen, its core source code is scarce. KVM has become one of the mainstream VMMs in academia.

Two, KVM installation configuration

1. CPU virtualization enabled

You need to enable virtualization in the BIOS, which is generally enabled by default

| cat /proc/cpuinfo | grep'vmx' //Intel CPU judgment method cat /proc/cpuinfo | grep'svm' //AMD CPU judgment method|
|--------|

2. Install KVM

Parameter explanation:

kvm: a module of the linux kernel, the module does not need to be installed, only needs to be loaded

qemu: virtualization software, which can virtualize different CPUs and supports heterogeneous

qemu-kvm: User mode management kvm, network cards, sound cards, PCI devices, etc. are all managed by qemu.

virt-viewer: A tool when using VNC client to connect to the server's graphical interface.

3. Load the kvm module

| modprobe kvm-intel //Load the kvm module lsmod | grep kvm //Check whether the kvm module is loaded|
|--------|

4. Modify the configuration file of the network card

**eth0 **

New br0

Don't worry about whether the IP addresses of the network cards are consistent or not, the role of eth0 now is similar to a switch. (No IP)

It is normal as shown below.

5. Modify the configuration file of the VNC server

Remove the # comment in front of vnc_listen = "0.0.0.0" // on line 12 of the file

6. Restart libvirtd and messagebus services

7. Create virtual disk

Create a virtual disk, -f specifies the format, the path is /opt/CentOS-6.5-x86_64.raw, the size is 10G

8. Copy the image file to the directory and the virtual disk storage directory

Insert the server CD into cdrom1

9. Create a virtual machine

Parameter explanation:

Create a virtual machine called centos6.5, the memory size is 512 memory, 1 cpu, 50G hard disk, the installation image is /opt/Centos6.5-x86_64.iso designated as full virtualization, the system type is designated as linux virtual The hard disk of the machine is opt/CentOS-6.5-x86_64.raw, and the port of vnc is configured as 7789 to automatically start the installation.

Verification: virshlist

10. Set iptables security policy

11. Use VNC client to connect to KVM virtual machine

If your Xshell will automatically pop up this window, it is also possible. If not, you can close it and use VNC to connect.

Enter the IP address and port

start installation

12. Configure KVM virtual machine

For example, install an Apache web-server

Configure IP address

Use Xshell to connect (a simple example of yum method)

Start httpd service

**Browser access test ok! **