KVM--Install Ubuntu20.04（十二）

1，Create virtual hard disk

qemu-img create -f qcow2 docker01.img 50G

2，Create virtual machine ubuntu 20.04

virt-install --name dcoker01 --memory 2048 --vcpus 2 --disk /kvm/img/docker01.img,format=qcow2,bus=virtio --accelerate --cdrom /kvm/iso/ubuntu-20.04.3-live-server-amd64.iso --network bridge=br0,model=virtio --graphics vnc,listen=0.0.0.0,port=5950 --noautoconsole

3，Enable console on ubuntu20.04 （vnc connection virtual machine）

sudo systemctl start serial-getty@ttyS0
sudo systemctl enable serial-getty@ttyS0
Created symlink /etc/systemd/system/getty.target.wants/serial-getty@ttyS0.service → /lib/systemd/system/serial-getty@.service.

4， virtual machine ubuntu 20.04 console

[root@kvm-node2 ~]# virsh  console   docker01
Connected to domain docker01
Escape character is ^]

docker-node01 login:

5，System version

docker@docker-node01:~$ lsb_release  -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 20.04.3 LTS
Release:        20.04
Codename:       focal

6，virtual machine snapshot

（1）Command format

virsh snapshot-create-as 【vm name】 【Snapshot name】

（2）View the version of the virtual machine snapshot

[root@kvm-node2 /]# virsh snapshot-list docker01

（3）View the version of the current virtual machine mirror snapshot

[root@kvm-node2 /]# virsh snapshot-current docker01

7，ubuntu 20.04 sudo command password free

sudo vim /etc/sudoers
docker ALL=(ALL:ALL) NOPASSWD: ALL

Importing a virtual machine image

virt-install --name guest-rhel7 --memory 2048 --vcpus 2 --disk /kvm/img/node01.img,format=qcow2,bus=virtio --accelerate --import --network bridge=br0,model=virtio --os-variant rhel7 --graphics vnc,listen=0.0.0.0 --noautoconsole

View VNC Port

virsh  vncdisplay   guest-rhel7