You can update the network configuration for your KVM installation using the command line using the virsh command.

To list all of the available network enter the following command. The --all will is used to include the inactive networks:

# virsh net-list --all Name State Autostart ----------------------------------------- default active yes NattedNetwork active yes

You may or may not be aware if it, but an OVA file is just a tar archive containing an .ovf and a .vmdk files, respectively the VM configuration and disk.

$ ls *.ova HTAOE.ova $ tar tf HTAOE.ova HTAOE.ovf HTAOE-disk001.vmdk HTAOE.mf

So, you can simply extract the files:

To find details about the virtual network you can use these commands:

root@slacker:~# virsh net-list Name State Autostart Persistent -------------------------------------------- default active yes yes root@slacker:~# virsh net-info default Name: default UUID: 14a90f27-9a85-42ca-b434-6ce6c142690c Active: yes Persistent: yes Autostart: yes Bridge: virbr0 root@slacker:~# virsh net-dhcp-leases default Expiry Time MAC address Protocol IP address Hostname Client ID or DUID ------------------------------------------------------------------------------------------------------------ 2023-07-22 16:18:45 52:54:00:dd:7b:62 ipv4 192.168.122.216/24 centos7-bbk -

You can use a combination of command line tools to create and configure a virtual machine. Here we will use few tools from the QEMU and libvirt packages to do this.

Use QEMU to create a 15GB QCOW disk image:

$ qemu-img create -f qcow2 /home/user/KVM/CentOS-Stream-9.qcow2 15G Formatting '/home/user/KVM/CentOS-Stream-9.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=16106127360 lazy_refcounts=off refcount_bits=16

Start the installation:

$ sudo virt-install --name=CentOS-Stream-9 --vcpus=1 --memory=1024 --location=/home/user/Downloads/CentOS-Stream-9-20230704.1-x86_64-boot.iso --os-variant=centos8 --network bridge:virbr0 --disk path=/home/user/KVM/CentOS-Stream-9.qcow2 --disk size=15 Password: WARNING Requested memory 1024 MiB is less than the recommended 1536 MiB for OS centos8 Starting install... Retrieving 'vmlinuz' | 0 B 00:00:00 ... Retrieving 'initrd.img' | 0 B 00:00:00 ... Allocating 'CentOS-Stream-9.qcow2' | 2.5 MB 00:00:03 ... WARNING Overriding memory to 3072 MiB needed for centos8 network install. Creating domain... | 0 B 00:00:00 Running graphical console command: virt-viewer --connect qemu:///system --wait CentOS-Stream-9

It is easy to convert a VirtualBox VDI image to a KVM qcow2 file. You have to use the RAW file format as an intermediate.

Make sure the VirtualBox machine is shutdown.

1. Convert the VDI to a raw disk image. Note: VDIs are compressed and raw images are not, so you will need to leave enough disk space for entire uncompressed disk. $ VBoxManage clonehd –format RAW vm.vdi vm.img
2. Then on your KVM host: $ qemu-img convert -f raw vm.img -O qcow2 vm.qcow2