Currently I have bitnami discourse in docker and the data storing in pod, we scale up the pods from 1 to many. Now I am facing error with media uploads, the issue is the pods data are not in sync so I have to mount single volume and shared it between pods. But I want to do that persistent volume claim in kubernetes with the help of azure-storage-class not in docker volume.
I presume you are using your own kubernetes manifest as bitnami aren't supporting discourse chart currently. Mainly, what I understand that you need is a volume that could be accessed by many PODs.
I think you would need read-write-many volume, this is not usually supported by cloud providers but let's give a try in azure.
I hope it helps.