Ubuntu 11.04
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Create Virtual Machine #1
2011/04/30
  Install GuestOS and create Virtual Machine. This example shows to install Ubuntu 11.04.

[1] Install on text mode via network, it's OK on Console or remote connection with Putty and so on.
root@dlp:~#
mkdir -p /var/kvm/images
# create a storage pool

root@dlp:~#
virt-install \
-n www \
-r 2048 \
-f /var/kvm/images/www.img \
-s 20 \
--vcpus=2 \
--os-type linux \
--os-variant=virtio26 \
--network bridge=br0 \
--nographics \
--location='http://jp.archive.ubuntu.com/ubuntu/dists/natty/main/installer-amd64/' \
--extra-args='console=tty0 console=ttyS0,115200n8'


Starting install...
# installation starts
  For options, make sure 'man virt-install', there are many options

-n specify the name of Virtual Machine
-r specify the amount of memories of Virtual Machine
-f specify the location of disks of Virtual Machine
-s specify the amount of disks of Virtual Machine
--vcpus=
specify the virtual CPUs
--os-type
specify types of GuestOS
--network=
specify network types of Virtual Machine
--nographics
nographics
--location=
specify location of installation where from
--extra-args=
specify parameters that is set in kernel

[2] Install on text mode, it's the same with common procedure of installation. After finishing installation, reboot first and then login prompt is shown like follwos.
Ubuntu 11.04 www ttyS0

www login:
# login with a user set in installation
[3] Move to GuestOS to HostOS with Ctrl + ] key.
Move to HostOS to GuestOS with a command 'virsh console (name of virtual machine)'.
narwhal@www:~$
# push Ctrl + ]

root@dlp:~#
# Host's console


root@dlp:~#
virsh console www
 
# move to Guest

Connected to domain www
Escape character is ^]
# Enter key


narwhal@www:~$
# Guest's console
[4] Because after installing GuestOS from network, it is minimum settings, so it's useful to save it as a template in order to create new virtual machines later. Please refer next topic to create a new virtual machine from template below.
root@dlp:~#
# Host's console

root@dlp:~#
virt-clone --original www --name template --file /var/kvm/images/template.img

Cloning www.img
| 20 GB 01:39


Clone 'template' created successfully.
root@dlp:~#
ll /var/kvm/images/template.img

-rwxr-xr-x 1 root root 21474836480 2011-04-30 17:47 /var/kvm/images/template.img*
root@dlp:~#
ll /etc/libvirt/qemu/template.xml

-rw------- 1 root root 1293 2011-04-30 17:46 /etc/libvirt/qemu/template.xml
[5] Set basic initial config to GuestOS first before using it.

[6] Define a new Storage Pool.
root@dlp:~#
mkdir /etc/libvirt/storage/

root@dlp:~#
vi /etc/libvirt/storage/disk01.xml


# create new

<pool type='dir'>
 
# any name

  <name>disk01</name>
  <capacity>0</capacity>
  <allocation>0</allocation>
  <available>0</available>
  <source>
  </source>
  <target>
   
# specify pool directory

    <path>/var/kvm/images</path>
    <permissions>
        <mode>0700</mode>
        <owner>-1</owner>
        <group>-1</group>
    </permissions>
  </target>
</pool>


root@dlp:~#
virsh pool-define /etc/libvirt/storage/disk01.xml

Pool disk01 defined from /etc/libvirt/storage/disk01.xml

root@dlp:~#
virsh pool-start disk01

Pool disk01 started

root@dlp:~#
virsh pool-autostart disk01

Pool disk01 marked as autostarted

root@dlp:~#
virsh pool-list

Name
State
Autostart

-----------------------------------------
disk01
active
yes


root@dlp:~#
virsh pool-info disk01

Name:
disk01

UUID:
6bab4517-b0eb-0700-fd89-1ae15bd937ef

State:
running

Persistent:
yes

Autostart:
yes

Capacity:
285.30 GB

Allocation:
3.57 GB

Available:
281.73 GB

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