Create DVD Drive ISO Library XenServer or XCP-ng

1) Login to the server via ssh or can WinSCP software to connect using scp protocal.

2) Create an folder:

mkdir /opt/os

3) Open the folder

cd /opt/os

4) Download setups (.iso) files

wget http://in.mirror.coganng.com/ubuntu-cdimage/20.04.3/ubuntu-20.04.3-desktop-amd64.iso

5) Mount ISO folder

xe sr-create name-label="OS" type=iso device-config:location=/opt/os device-config:legacy_mode=true content-type=iso

Now, create new VM, all the .iso files will be available in the dropdown.

If you upload any .iso file after the xe sr-create, you need to rescan the storage resource (sr) to recognize new .iso files. To do this follow steps:

1) Find UUID of the sr

xe sr-list

2) Rescan sr folder:

xe sr-scan uuid=<uuid-of-sr>

Now you will be able to see the new .iso files.

Reference:
https://www.youtube.com/watch?v=eNuBw3O0SmU