Create and start an xen VM

Create and start an xen VM

Semi-Virtualization

Get sample image
Download and decompress the package at jailtime.org (note that the default root password is password)
# Tar jxvf centos.5-0.20070424.img.tar.bz2
Centos.5-0.img
Centos.5-0. xen2.cfg
Centos.5-0. xen3.cfg
Centos. Swap

You can download it at http://www.rpath.com/rbuilder.

Create a configuration file
Refer to centos.5-0. xen2.cfg and centos.5-0. xen3.cfg. The content is:
Kernel = "/boot/vmlinuz-2.6.18-xen"
Ramdisk = "/boot/initrd-2.6.18-xen.img"
Memory = 256
Name = "centos.5-0"
DHCP = "DHCP"
VIF = ['']
Disk = ['Tap: AIO:/home/xen/centos.5-0.img, xvda1, W ',
'Tap: AIO:/home/xen/centos. Swap, xvda2, W']
Root = "/dev/xvda1 ro"

Integrating loadable kernel modules into your root filesystem
$ Uname-R
2.6.18-xen
$ Su
Password :*********
# Mkdir-P/mnt/img
# Mount-o loop centos.5-0.img/mnt/img
# Cd/mnt/img/lib/modules
# Cp-r/lib/modules/'uname-R '.
# Ls
2.6.18-xen

Modify other configuration files
# Cat/mnt/img/etc/fstab
/Dev/xvda1/ext3 defaults 1 1
/Dev/xvda2 none swap SW 0 0
None/dev/PTS devpts gid = 5, mode = 620 0 0
None/dev/SHM tmpfs defaults 0 0
None/proc defaults 0 0
None/sys sysfs defaults 0 0

# Cat/mnt/img/etc/sysconfig/network-scripts/ifcfg-eth0
Type = Ethernet
Device = eth0
Bootproto = DHCP
Onboot = Yes

# Cat/mnt/img/etc/Network/interfaces
Auto Lo
Iface lo Inet loopback
Auto eth0
Iface eth0 Inet DHCP

# Cd/
# Sync
# Umount/mnt/img

Creating initial RAM disks and filesystems for your Kernel
# Yaird -- output initrd-2.6.18-xen.img 2.6.18-xen
# Mkinitramfs-O initrd-2.6.18-xen.img 2.6.18-xen
# Mkinitrd-O initrd-2.6.18-xen.img 2.6.18-xen

Start a VM

# XM create centos.5-0. xen3.cfg-C

# XM list
Name id mem (MIB) vcpus state time (s)
Domain-0 0 1752 2 R ----- 56978.8
Foresight 46 384 1-B ---- 1180.1
Opensuse 17 256 1-B ---- 2114.4
Ubuntu 34 256 1-B ---- 591.7
Centos.5-0 45 256 1-B ---- 302.9
Freespire-hvm 49 256 1-B ---- 63.2

Terminal connected to the Virtual Machine
# XM console 45 &


Fully virtualized hvm

A simple freespire. cfg:
Import OS, re
Arch = OS. uname () [4]
If Re. Search ('64', arch ):
Arch_libdir = 'lib64'
Else:
Arch_libdir = 'lib'
Kernel = "/usr/lib/xen/boot/hvmloader"
Builder = 'hvm'
Memory = 256
Shadow_memory = 8
Name = "FS-IMG-HV"
ACPI = 1
APIC = 1
VIF = ['Type = ioemu, bridge = xenbr0'
Disk = ['Tap: AIO:/home/xen/hvm/freespire1013.img, hda, W ',
'Phy:/dev/hda, HDC: CDROM, R']
Device_model = '/usr/' + arch_libdir + '/xen/bin/qemu-dm'
Boot = "DC"
Serial = 'PTY'
USB = 1
Usbdevice = 'tablet'
The created virtual machine can be connected through VNC. The VNC port that you connect to is 127.0.0.1: 5900 + domainid
$ Vncviewer 127.0.0.1: 5931

SDL Configuration:
SDL = 1
VNC = 0

Start a VM
# XM create freespire. cfg-C

Automatically Start Domains

Put the configuration file in the/etc/xen/auto/directory.