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This article mainly introduces "how to install the Xen virtual machine in CentOS". In the daily operation, I believe that many people have doubts about how to install the Xen virtual machine in CentOS. The editor consulted all kinds of materials and sorted out a simple and easy-to-use operation method. I hope it will be helpful to answer the doubt of "how to install the Xen virtual machine in CentOS". Next, please follow the editor to study!

I. preparation of xen virtual environment

Method one, after selecting the xen component during installation, the system naturally supports xen.

Method two is to install the xen components manually when needed.

1. Yum automatically installs xen components

The code is as follows:

# yum install kernel-xen xen-libs xen

two。 Modify the boot list to boot the system using the kernel running xen

The code is as follows:

# vi / boot/grub/grub.conf

Default=0

Title CentOS (2.6.18-194.3.1.el5xen)

Root (hd0,0)

Kernel / xen.gz-2.6.18-194.3.1.el5

Module / vmlinuz-2.6.18-194.3.1.el5xen ro root=LABEL=/

Module / initrd-2.6.18-194.3.1.el5xen.img

Note: after yum installation, the grub menu is installed automatically. If not, add it manually and there will be relevant kernel files under the / boot menu.

3. Reboot automatically enters the kernel of the xen component.

4. View xen startup

(1) set xen to boot

The code is as follows:

# chkconfig-- list | grep xend

Xend 0:off 1:off 2:on 3:on 4:on 5:on 6:off

Xendomains 0:off 1:off 2:off 3:on 4:on 5:on 6:off

(2) the operation of xen (the following indicates that it has been started)

The code is as follows:

# xm list

Name ID Mem (MiB) VCPUs State Time (s)

Domain-0 0 211 1 r-90.5

5. Create an installation source

The installation source of the Linux virtual system is required when installing the Linux virtual system in the Xen virtual machine semi-virtual environment. It can be provided to the Xen virtual machine for system installation using HTTP, FTP, or NFS. Ftp is used for installation here.

The code is as follows:

# yum install-y vsftpd

# service vsftpd start

# mount / dev/cdrom / var/ftp/pub/

Description: anonymous access is supported after vsftpd is installed.

II. Installation of XEN virtual machine

1. Create a virtual machine

The code is as follows:

# virt-install-prompt

What is the name of your virtual machine? Centos5

How much RAM should be allocated (in megabytes)? 256

What would you like to use as the disk (file path)? / data/test.img

# Note: here you can directly use the pre-partitioned lvm logical volume partition as the xen virtual machine disk.

# for example: / dev/lvmdata/var01

How large would you like the disk (/ data/test.img) to be (in gigabytes)? 3

What is the install URL? Ftp://192.168.44.141/pub/

Starting install...

Retrieving file .treeinfo... | | 413B 00:00 |

Retrieving file vmlinuz... | | 2.1 MB 00:00 |

Retrieving file initrd.img... | | 6.6 MB 00:00 |

Creating storage file... | | 3.0 GB 00:00 |

# until the installation is completed, the installation process is the same as the CD-ROM character mode installation, and it can also be installed by vnc graphical interface, which is omitted here.

# xm list

Name ID Mem (MiB) VCPUs State Time (s)

Domain-0 0 877 2 r-1781.7

Centos5 12 300 1-b murmuri-31.5

Testos 11 300 1-b murmuri-40.9

two。 Enter the console of the centos5 virtual host

The code is as follows:

# xm console centos5

# ctrl+] exit the Virtualization console

At this point, the study on "how to install the Xen virtual machine in CentOS" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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