Creating a VM

Start the libvirtd service and enable the libvertd service to automatically start upon system startup.
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systemctl start libvirtd systemctl enable libvirtd

Create a storage pool.

Create a storage pool directory and configure operation permissions for the directory.

         
              mkdir -p /home/kvm/images
chown root:root /home/kvm/images
chmod 755 /home/kvm/images

Define a storage pool and bind it to the directory created. Create a folder-based storage pool, activate it, and enable it to start upon system startup.

         
              virsh pool-define-as StoragePool --type dir --target /home/kvm/images
virsh pool-build StoragePool
virsh pool-start StoragePool
virsh pool-autostart StoragePool

Query the storage pool information.

         
              virsh pool-info StoragePool
virsh pool-list

Create the drive space for the virtual machine (VM).

Create a volume.

For example, the volume named is 1.img, the storage pool is StoragePool, the volume capacity is 50 GB, the initially allocated capacity is 1 GB, the file format is qcow2, and the drive file format is qcow2.

         
              virsh vol-create-as --pool StoragePool --name 1.img --capacity 50G --allocation 1G --format qcow2

Check volume information.

         
              virsh vol-info /home/kvm/images/1.img

Create a VM.

Create VM vm1, and allocate four CPUs, 8 GB memory, and 1.img drive space to it. Copy the .iso file to a non-root directory, and install CentOS 7.6.

         
              brctl addbr br1
virt-install --name=vm1 --vcpus=4 --ram=8192  --disk path=/home/kvm/images/1.img,format=qcow2,size=50,bus=virtio --cdrom /xxx/CentOS-7-aarch64-Everything-1810.iso --network bridge=br1,model=virtio --force  --autostart

Installing the OS on the VM.
Configure all items that contain !. Input the serial numbers corresponding to the items and configure them as prompted. Then, press b to start the installation.
After the installation is complete, the login prompt is displayed.

Parent topic: Installing VMs