XCP-NG Center only for Windows base, but Linux ,BSD ,OSX do not support.
XCP-NG funder also create another project Xen Orchestra(XOA).
XOA has 4 Prodcut license level , include Free , Starter($77/mo), Enterprise($220/mo), Premium($550/mo)，Free License do not include XOSAN license. XCP-NG remove GFS2(no opensource), If you want use iSCSI in XCP-NG, XOSAN is need. Read more