Virtualization With KVM On A CentOS 5.2 Server - Page 2
4 Creating A Debian Lenny Guest (Image-Based)
CentOs 5.2 KVM Host:
Now let's go back to our CentOS 5.2 KVM host.
Take a look at
man virt-install
to learn how to use virt-install.
To create a Debian Lenny guest (in bridging mode) with the name vm10, 512MB of RAM, two virtual CPUs, and the disk image ~/vm10.qcow2 (with a size of 12GB), insert the Debian Lenny Netinstall CD into the CD drive and run
virt-install --connect qemu:///system -n vm10 -r 512 --vcpus=2 -f ~/vm10.qcow2 -s 12 -c /dev/cdrom --vnc --noautoconsole --os-type linux --os-variant generic26 --accelerate --network=bridge:br0 --hvm
(The virt-install man page shows the values that are valid for --os-type and --os-variant. The virt-install version that comes with CentOS 5.2 doesn't know Debian Lenny, so we use generic26 for --os-variant.)
Of course, you can also create an ISO image of the Debian Lenny Netinstall CD...
dd if=/dev/cdrom of=~/debian-500-amd64-netinst.iso
... and use the ISO image in the virt-install command:
virt-install --connect qemu:///system -n vm10 -r 512 --vcpus=2 -f ~/vm10.qcow2 -s 12 -c ~/debian-500-amd64-netinst.iso --vnc --noautoconsole --os-type linux --os-variant generic26 --accelerate --network=bridge:br0 --hvm
The output is as follows:
[root@server1 ~]# virt-install --connect qemu:///system -n vm10 -r 512 --vcpus=2 -f ~/vm10.qcow2 -s 12 -c ~/debian-500-amd64-netinst.iso --vnc --noautoconsole --os-type linux --os-variant generic26 --accelerate --network=bridge:br0 --hvm
Starting install...
Creating storage file... 100% |=========================| 12 GB 00:00
Creating domain... 0 B 00:00
Domain installation still in progress. You can reconnect to
the console to complete the installation process.
[root@server1 ~]#
5 Connecting To The Guest
Ubuntu 8.10 Desktop:
The KVM guest will now boot from the Debian Lenny Netinstall CD and start the Debian installer - that's why we need to connect to the graphical console of the guest. You can do this with virt-manager on the Ubuntu 8.10 desktop (see KVM Guest Management With Virt-Manager On Ubuntu 8.10).
Run
sudo virt-manager
on the Ubuntu desktop to start virt-manager.
(If you are on a Fedora 10 desktop, run:
su
virt-manager
)
In virt-manager, connect to the KVM host:
Type in the root password of the KVM host:
You should see vm10 as running. Mark that guest and click on the Open button to open the graphical console of the guest:
Type in the root password of the KVM host again:
You should now be connected to the graphical console of the guest and see the Debian installer:
Now install Debian as you would normally do on a physical system. Please note that at the end of the installation, the Debian guest needs a reboot. The guest will then stop, so you need to start it again, either with virt-manager or like this on our CentOS 5.2 KVM host command line:
CentOS 5.2 KVM Host:
virsh --connect qemu:///system
start vm10
quit
Afterwards, you can connect to the guest again with virt-manager and configure the guest. If you install OpenSSH (package openssh-server) in the guest, you can connect to it with an SSH client (such as PuTTY).
