How To Customize Qcow2/Raw Linux OS disk image with virt-customize

1. How do I edit an image in qcow2?
2. How do I create a VM using qcow2 image file in KVM?
3. What is virt customize?
4. How do you use virt edit?
5. What is QEMU NBD?
6. How do I create a KVM image?
7. What is qcow2 file?
8. Is qcow2 compressed?

How do I edit an image in qcow2?

Resize an image

We create a new qcow2 image and use the virt-resize command to write a resized copy of the original into the new image: # qemu-img create -f qcow2 /data/images/win2012-50gb. qcow2 50G # virt-resize --expand /dev/sda2 /data/images/win2012. qcow2 \ /data/images/win2012-50gb.

How do I create a VM using qcow2 image file in KVM?

Create VM using the qcow2 Image File (KVM)

1. Login to your machine as root user.
2. Navigate to the directory where the installation files were downloaded. ...
3. Move the image file to the directory where you want to place the VM.
4. In the Linux desktop, open Virt-manager and click Create a new virtual machine .

What is virt customize?

DESCRIPTION. Virt-customize can customize a virtual machine (disk image) by installing packages, editing configuration files, and so on. Virt-customize modifies the guest or disk image in place. The guest must be shut down.

How do you use virt edit?

virt-edit is a command line tool to edit file where each file exists in the named virtual machine (or disk image). Multiple filenames can be given, in which case they are each edited in turn. Each filename must be a full path, starting at the root directory (starting with '/').

What is QEMU NBD?

qemu−nbd − QEMU Disk Network Block Device Server.

How do I create a KVM image?

Create the image

1. Create an empty instance. First you must create a file that describes your minimal instance, which is a JSON file like the following. ...
2. Copy in required files (OS, SDC VM tools, etc.) ...
3. Boot the instance. ...
4. Connect to the instance. ...
5. Prepare the instance. ...
6. Finalize the image.

What is qcow2 file?

qcow is a file format for disk image files used by QEMU, a hosted virtual machine monitor. It stands for "QEMU Copy On Write" and uses a disk storage optimization strategy that delays allocation of storage until it is actually needed.

Is qcow2 compressed?

Only the qcow2 format supports encryption or compression. qcow2 encryption uses the AES format with secure 128-bit keys. qcow2 compression is read-only, so if a compressed sector is converted from qcow2 format, it is written to the new format as uncompressed data.