KVM : Create Virtual Machine2023/06/20 |
Install GuestOS and Create a Virtual Machine.
This example shows to create VM with installing Debian 12. |
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[1] | On this example, Download an ISO file of Debian 12 on a directory first and Install GuestOS from the ISO on the text mode. It's OK on the console or remote connection via SSH and so on. Furthermore, Virtual Machine's images are placed at [/var/lib/libvirt/images] by default as a Storage Pool, however this example shows to create and use a new Storage Pool. (OK to use any place you like) |
# create a Storage Pool directory root@dlp:~# mkdir -p /var/kvm/images root@dlp:~# virt-install \ --name debian12 \ --ram 4096 \ --disk path=/var/kvm/images/debian12.img,size=20 \ --vcpus 2 \ --os-variant debian11 \ --network bridge=br0 \ --graphics none \ --console pty,target_type=serial \ --location /home/debian-12.0.0-amd64-DVD-1.iso \ --extra-args 'console=ttyS0,115200n8 serial' # installation starts Starting install... Retrieving file vmlinuz... | 6.5 MB 00:00 Retrieving file initrd.gz... | 17 MB 00:00 Allocating 'debian12.img' | 20 GB 00:00 ..... ..... # after this, installation proceeds with the common procedure |
The example of options above means like follows. There are many options for others, make sure with [man virt-install].
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[2] | For installing on text mode, it's the same with common installation procedure. After finishing installation, restart computer and then login prompt is shown like follows. |
Debian GNU/Linux 12 debian ttyS0 debian login: root Password: Linux debian 6.1.0-9-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.27-1 (2023-05-08) x86_64 The programs included with the Debian GNU/Linux system are free software; the exact distribution terms for each program are described in the individual files in /usr/share/doc/*/copyright. Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent permitted by applicable law. root@debian:~# |
[3] | Move to GuestOS to HostOS with Ctrl + ] key. Move to HostOS to GuestOS with a command [virsh console (name of virtual machine)]. |
root@debian:~# # Ctrl + ] key root@dlp:~# # Host's console root@dlp:~# virsh console debian12 # switch to Guest's console Connected to domain 'debian12' Escape character is ^] # Enter key root@debian:~# # Guest's console |
[4] | It's easy to replicate a copy VM from current VM with a command below. |
root@dlp:~# virt-clone --original debian12 --name template --file /var/kvm/images/template.img Allocating 'template.img' | 1.6 GB 00:00 ... Clone 'template' created successfully. # disk image root@dlp:~# ll /var/kvm/images/template.img -rw------- 1 root root 1979973632 Jun 19 18:57 /var/kvm/images/template.img # configuration file root@dlp:~# ll /etc/libvirt/qemu/template.xml -rw------- 1 root root 6685 Jun 19 18:57 /etc/libvirt/qemu/template.xml |
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