def get_cluster_vsan_info(cluster_ref):
    '''
    Returns the extended cluster vsan configuration object
    (vim.VsanConfigInfoEx).

    cluster_ref
        Reference to the cluster
    '''

    cluster_name = salt.utils.vmware.get_managed_object_name(cluster_ref)
    log.trace('Retrieving cluster vsan info of cluster \'%s\'', cluster_name)
    si = salt.utils.vmware.get_service_instance_from_managed_object(
        cluster_ref)
    vsan_cl_conf_sys = get_vsan_cluster_config_system(si)
    try:
        return vsan_cl_conf_sys.VsanClusterGetConfig(cluster_ref)
    except vim.fault.NoPermission as exc:
        log.exception(exc)
        raise VMwareApiError('Not enough permissions. Required privilege: '
                             '{0}'.format(exc.privilegeId))
    except vim.fault.VimFault as exc:
        log.exception(exc)
        raise VMwareApiError(exc.msg)
    except vmodl.RuntimeFault as exc:
        log.exception(exc)
        raise VMwareRuntimeError(exc.msg)
Returns the extended cluster vsan configuration object
    (vim.VsanConfigInfoEx).

    cluster_ref
        Reference to the cluster