Create Virtual Machine#12017/06/22 |
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Install GuestOS and create Virtual Machine. This example shows to install Debian.
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| [1] | Create a Virtual Machine on text mode via network, it's OK on Console or remote connection with Putty and so on. |
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root@dlp:~#
apt -y install libosinfo-bin libguestfs-tools virt-top # create a storage pool root@dlp:~# mkdir -p /var/kvm/images root@dlp:~# virt-install \
--name template \
--ram 4096 \ --disk path=/var/kvm/images/template.img,size=30 \ --vcpus 2 \ --os-type linux \ --os-variant debian9 \ --network bridge=br0 \ --graphics none \ --console pty,target_type=serial \ --location 'http://ftp.jaist.ac.jp/pub/Linux/debian/dists/stretch/main/installer-amd64/' \ --extra-args 'console=ttyS0,115200n8 serial'
Starting install... # installation starts # after finishing installation, back to KVM host and shutdown the guest like follows root@dlp:~# virsh shutdown template Domain template is being shutdown # mount guest's disk and enable a service like follows root@dlp:~# guestmount -d template -i /mnt root@dlp:~# ln -s /mnt/lib/systemd/system/getty@.service /mnt/etc/systemd/system/getty.target.wants/getty@ttyS0.service root@dlp:~# umount /mnt
# start guest again, if it's possible to connect to the guest's console, it's OK all root@dlp:~# virsh start template --console Domain template started Connected to domain template Escape character is ^] Debian GNU/Linux 9 debian ttyS0 debian login: |
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For options, make sure [man virt-install], there are many options.
--name
specify the name of Virtual Machine
--ram
specify the amount of memories of Virtual Machine
--disk path=xxx ,size=xxx
[path=] ⇒ specify the location of disks of Virtual Machine
--vcpus[size=] ⇒ specify the amount of disks of Virtual Machine
specify the virtual CPUs
--os-type
specify the type of GuestOS
--os-variant
specify the kind of GuestOS - list all valid variant with the following command
--network# osinfo-query os
specify network types 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 where from
--extra-args
specify parameters that is set in kernel
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| [2] | Move to GuestOS to HostOS with Ctrl + ] key. Move to HostOS to GuestOS with a command 'virsh console (name of virtual machine)'. |
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debian@dlp:~$
# Ctrl + ] key root@dlp:~# # Host's console
root@dlp:~#
debian@dlp:~$ virsh console template # move to Guest Connected to domain template Escape character is ^] # Enter key
# Guest's console
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| [3] | It's easy to clone a virtual machine from existing one to new like follows. |
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# Hosts's console root@dlp:~# virt-clone --original template --name debian9 --file /var/kvm/images/debian9.img Allocating 'debian9.img' | 30 GB 00:15 Clone 'debian9' created successfully.root@dlp:~# ll /var/kvm/images/debian9.img -rw------- 1 root root 1743912960 Jun 23 09:24 /var/kvm/images/debian9.img root@dlp:~# ll /etc/libvirt/qemu/debian9.xml -rw------- 1 root root 3170 Jun 23 09:24 /etc/libvirt/qemu/debian9.xml |
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