KVM : Create Virtual Machines2024/11/05 |
Install GuestOS and Create a Virtual Machine. This example shows to create VM with installing Fedora 41.
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[1] | On this example, Download an ISO file of Fedora 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 images are placed at [/var/lib/libvirt/images] by default as a Storage Pool, but this example shows to create and use a new Storage Pool.(use any place you like) |
# create a Storage Pool directory [root@dlp ~]# mkdir -p /var/kvm/images [root@dlp ~]# virt-install \ --name fedora41 \ --ram 4096 \ --disk path=/var/kvm/images/fedora40.img,size=20 \ --vcpus 2 \ --os-variant fedora40 \ --network bridge=br0 \ --graphics none \ --console pty,target_type=serial \ --location /home/Fedora-Server-dvd-x86_64-41-1.4.iso \ --extra-args 'console=ttyS0,115200n8' Starting install... # installation starts ..... ..... # after that, 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] | After finishing installation, restart computer and then login prompt is shown like follows. |
Fedora Linux 41 (Server Edition) Kernel 6.11.4-301.fc41.x86_64 on an x86_64 (ttyS0) Web console: https://localhost:9090/ or https://10.0.0.218:9090/ localhost login: |
[3] | Move to GuestOS to HostOS with Ctrl + ] key. Move to HostOS to GuestOS with a command [virsh console (name of virtual machine)]. |
[root@localhost ~]# # Ctrl + ] key [root@dlp ~]# # Host's console [root@dlp ~]# virsh console fedora41 # switch to Guest's console Connected to domain fedora41 Escape character is ^] # Enter key [root@localhost ~]# # Guest's console |
[4] | It's easy to replicate a copy VM from current VM with a command below. |
[root@dlp ~]# virt-clone --original fedora41 --name template --file /var/kvm/images/template.img Allocating 'template.img' | 1.4 GB 00:00 ... Clone 'template' created successfully. # disk image [root@dlp ~]# ll /var/kvm/images/template.img -rw-------. 1 root root 2165637120 Nov 5 09:21 /var/kvm/images/template.img # configuration file [root@dlp ~]# ll /etc/libvirt/qemu/template.xml -rw-------. 1 root root 6736 Nov 5 09:21 /etc/libvirt/qemu/template.xml |
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