Hi@akhtar,
You have to first download one preinstalled image in your system. You can go through the below-given link.
https://fedoraproject.org/server/download
Now you have to log in to your OpenStack cloud and run the below command. It will automatically create an image in OpenStack.
$ source keystonerc_demo
[root@openstack ~(keystone_demo)]# glance image-create --file Fedora-Cloud-Base-32-1.6.x86_64.qcow2 --disk-format qcow2 --container-format bare --name fed64
+------------------+--------------------------------------+
| Property | Value |
+------------------+--------------------------------------+
| checksum | 9ba41708fdc7d21a829e3836242f56d6 |
| container_format | bare |
| created_at | 2020-07-06T07:29:57Z |
| disk_format | qcow2 |
| id | 5c40dedf-57eb-4e68-9ee7-1bb7ffcb105a |
| min_disk | 0 |
| min_ram | 0 |
| name | fed64 |
| owner | c75cffdeb390468fa099948aa43a99b2 |
| protected | False |
| size | 302841856 |
| status | active |
| tags | [] |
| updated_at | 2020-07-06T07:30:00Z |
| virtual_size | None |
| visibility | shared |
+------------------+--------------------------------------+
I hope this will help you.