KVM : Create Virtual Machine2019/11/18 |
Install GuestOS and Create a Virtual Machine. This example shows to create VM with installing Fedora 31.
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[1] | Install GuestOS on text mode, it's OK on console or remote connection with Putty 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 \
Starting install...
--name fedora31 \
--ram 4096 \ --disk path=/var/kvm/images/fedora31.img,size=30 \ --vcpus 2 \ --os-type linux \ --os-variant fedora30 \ --network bridge=br0 \ --graphics none \ --console pty,target_type=serial \ --location 'http://ftp.iij.ad.jp/pub/linux/Fedora/fedora/linux/releases/31/Server/x86_64/os/' \ --extra-args 'console=ttyS0,115200n8 serial' # installation starts
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The example of options above means like follows. There are many options for others, make sure with [man virt-install].
--name
specify the name of Virtual Machine
--ram
specify the amount of memory of Virtual Machine
--disk path=xxx ,size=xxx
[path=] specify the location of disks of Virtual Machine (default is [/var/lib/libvirt/images])
--vcpus[size=] specify the amount of disk of Virtual Machine
specify the virtual CPUs
--os-type
specify the type of GuestOS
--os-variant
specify the kind of GuestOS
--networkpossible to show the list of OS with follows [# osinfo-query os]
specify network type of Virtual Machine
--graphics
specify the kind of graphics. if set [none], it means nographics
--console
specify the console type
--location
specify the location of installation source where from
--extra-args
specify parameters that are set in Kernel
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[2] | For installing on text mode, it's the same with common procedure of installation. After finishing installation, restart computer and then login prompt is shown like follwos. |
Fedora 31 (Server Edition) Kernel 5.3.7-301.fc31.x86_64 on an x86_64 (ttyS0) Web console: https://localhost: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 ~]#
[root@dlp ~]# # Ctrl + ] key [root@dlp ~]# # Host's console virsh console fedora31 # switch to Guest's console Connected to domain fedora31
Escape character is ^]
[root@localhost ~]# # Enter key # Guest's console
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[4] | It's easy to replicate a copy VM from current VM with a command below. |
[root@dlp ~]# virt-clone --original fedora31 --name template --file /var/kvm/images/template.img Allocating 'template.img' | 30 GB 00:02 Clone 'template' created successfully. # disk image [root@dlp ~]# ll /var/kvm/images/template.img -rw-------. 1 root root 1875443712 Nov 17 19:41 /var/kvm/images/template.img # configuration file [root@dlp ~]# ll /etc/libvirt/qemu/template.xml -rw-------. 1 root root 4744 Nov 17 19:41 /etc/libvirt/qemu/template.xml |
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