def create_datacenter(datacenter_name, service_instance=None):
    '''
    Creates a datacenter.

    Supported proxies: esxdatacenter

    datacenter_name
        The datacenter name

    service_instance
        Service instance (vim.ServiceInstance) of the vCenter.
        Default is None.

    .. code-block:: bash

        salt '*' vsphere.create_datacenter dc1
    '''
    salt.utils.vmware.create_datacenter(service_instance, datacenter_name)
    return {'create_datacenter': True}