KVM : Create Virtual Machines2022/05/23 |
Install GuestOS and Create a Virtual Machine. This example shows to create VM with installing Fedora 36.
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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's 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 fedora36 \ --ram 4096 \ --disk path=/var/kvm/images/fedora36.img,size=20 \ --vcpus 2 \ --os-variant fedora36 \ --network bridge=br0 \ --graphics none \ --console pty,target_type=serial \ --location /home/Fedora-Server-dvd-x86_64-36-1.5.iso \ --extra-args 'console=ttyS0,115200n8' Starting install... # installation starts ..... ..... # 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] | After finishing installation, restart computer and then login prompt is shown like follwos. |
Fedora Linux 36 (Server Edition) Kernel 5.17.5-300.fc36.x86_64 on an x86_64 (ttyS0) Web console: https://fedora:9090/ or https://10.0.0.211:9090/ 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 fedora36 # switch to Guest's console Connected to domain fedora36 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 fedora36 --name template --file /var/kvm/images/template.img llocating 'template.img' | 1.7 GB 00:07 ... Clone 'template' created successfully. # disk image [root@dlp ~]# ll /var/kvm/images/template.img -rw-------. 1 root root 1861812224 May 20 16:16 /var/kvm/images/template.img # configuration file [root@dlp ~]# ll /etc/libvirt/qemu/template.xml -rw-------. 1 root root 6692 May 20 16:16 /etc/libvirt/qemu/template.xml |
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