The simplest way to support this in your image is to install the cloud-utils package (contains the growpart tool for extending partitions), the cloud-initramfs-growroot package (which supports resizing root partition on the first boot), and the cloud
https://docs.openstack.org/image-guide/centos-image.html This example shows you how to install a CentOS image and focuses mainly on CentOS 7. Because the CentOS installation process might differ across versions, the installation steps might differ if