The following command will create a CentOS7.9-2009 image with different cloud-init data sources, DHCP enabled on all the interfaces and SELinux disabled.
Qemu img resize how to#
In this section, we will see how to create an image using the disk-image builder. On a VM install disk-image builder git clone These images are composed of the many included elements diskimage-builder acts as a framework to easily add your own elements for even further customization. It includes support for building images based on many major distributions and can produce cloud-images in all common formats ( qcow2, VHD, RAW, etc), bare metal file-system images and ram-disk images. What is disk-image builderĭiskimage-builder is a tool for automatically building customized operating-system images for use in clouds and other environments. It stands for “QEMU Copy On Write” and uses a disk storage optimization strategy that delays the allocation of storage until it is needed.
![qemu img resize qemu img resize](https://fortinetweb.s3.amazonaws.com/docs.fortinet.com/v2/resources/e77d7df5-b36d-11eb-b70b-00505692583a/images/a56d6005fd6ca7016c0304b36dbc1a15_extend-size-dataqcow2.png)
Qcow is a file format for disk image files used by QEMU, a hosted virtual machine monitor. This article will show you how to create customized qcow images using disk-image builder and virt-customize utility.Īlso, we will see how we can resize the qcow image and update the kernel version of the image. These configurations need to be done in the image itself.
![qemu img resize qemu img resize](https://i0.wp.com/addshore.com/wp-content/uploads/2019/08/image.png)
The same customer was running telco workload as well.įor telco workloads, we might require to set Huge Pages and IOMMU. For example, in my case, one of the customers was using the Platform9 Managed Bare Metal solution and the underlying hardware required Kernel > 4. We have standard public cloud images available like CentOS and Ubuntu but sometimes we need to customize the image based on specific workload requirements.