def attach_model(subscription, rgname, vmssvm_model, diskname, lun):
disk_id = '<STR_LIT>' + subscription + '<STR_LIT>' + rgname +'<STR_LIT>' + diskname<EOL>disk_model = {'<STR_LIT>': lun, '<STR_LIT>': '<STR_LIT>', '<STR_LIT>': '<STR_LIT:None>',<EOL>'<STR_LIT>': {'<STR_LIT>': '<STR_LIT>', '<STR_LIT:id>': disk_id}}<EOL>vmssvm_model['<STR_LIT>']['<STR_LIT>']['<STR_LIT>'].append(<EOL>disk_model)<EOL>return vmssvm_model<EOL>
Attach a data disk to a VMSS VM model