'Any initialization the volume driver does while starting.'

@utils.trace_method
def do_setup(self, context):

    super(HyperScaleDriver, self).do_setup(context)
    try:
        computes = HyperScaleDriver._fetch_config_for_compute()
        if (computes is None):
            computes = {}
        for compute in computes.keys():
            if ('disabled' in computes[compute].keys()):
                disabled = computes[compute]['disabled']
                if (disabled == '1'):
                    continue
            vsa_ip = computes[compute]['vsa_ip']
            vsa_isolated_ip = computes[compute]['vsa_isolated_ip']
            vsa_section_header = computes[compute]['vsa_section_header']
            compute_name = computes[compute]['compute_name']
            self.compute_map[vsa_ip] = vsa_isolated_ip
            self.vsa_map[vsa_ip] = vsa_section_header
            self.compute_meta_map[compute_name] = vsa_ip
            self.vsa_compute_map[vsa_ip] = compute_name
        cntr_info = HyperScaleDriver._fetch_config_for_controller()
        if (cntr_info is None):
            cntr_info = {}
        self.my_dnid = util.get_datanode_id()
        datanodes = HyperScaleDriver._fetch_config_for_datanode()
        if (datanodes is None):
            datanodes = {}
        for (key, value) in datanodes.items():
            if (self.my_dnid == value['hypervisor_id']):
                self.datanode_hostname = value['datanode_name']
                self.datanode_ip = value['data_ip']
                self.dn_routing_key = value['hypervisor_id']
        LOG.debug('In    init    compute_map    %s', self.compute_map)
        LOG.debug('In    init    vsa_map    %s', self.vsa_map)
        LOG.debug('In    init    compute_meta_map    %s', self.compute_meta_map)
    except (exception.UnableToProcessHyperScaleCmdOutput, exception.ErrorInFetchingConfiguration):
        err_msg = _('Unable    to    initialise    the    Veritas    cinder    driver')
        LOG.exception(err_msg)
        raise exception.VolumeBackendAPIException(data=err_msg)
    except Exception:
        err_msg = _('Internal    error    occurred')
        LOG.exception(err_msg)
        raise exception.VolumeBackendAPIException(data=err_msg)
