def modify_loadbalancer_backend_attributes(self, loadbalancer_backend,
                                               loadbalancer_backend_name=None,
                                               port=None,
                                               weight=None,
                                               disabled=None,
                                               **ignore):
        """ Modify load balancer backend attributes.
        @param loadbalancer_backend: the ID of backend.
        @param loadbalancer_backend_name: the name of the backend.
        @param port: backend server listen port.
        @param weight: backend server weight, valid range is from 1 to 100.
        """
        action = const.ACTION_MODIFY_LOADBALANCER_BACKEND_ATTRIBUTES
        valid_keys = ['loadbalancer_backend', 'loadbalancer_backend_name',
                      'port', 'weight', 'disabled']
        body = filter_out_none(locals(), valid_keys)
        if not self.conn.req_checker.check_params(body,
                                                  required_params=[
                                                      'loadbalancer_backend'],
                                                  integer_params=[
                                                      'port', 'weight', 'disabled'],
                                                  list_params=[]
                                                  ):
            return None

        if 'port' in body:
            self.conn.req_checker.check_lb_backend_port(body['port'])
        if 'weight' in body:
            self.conn.req_checker.check_lb_backend_weight(body['weight'])

        return self.conn.send_request(action, body)

    def describe_clusters(self, clusters=None,
                          role=None,
                          status=None,
                          verbose=1,
                          search_word=None,
                          owner=None,
                          offset=None,
                          limit=None,
                          tags=None,
                          **ignore):
        """ Describe clusters filtered by condition.
        @param clusters: the array of cluster IDs.
        @param status: pending, active, stopped, deleted, suspended, ceased
        @param verbose: the number to specify the verbose level, larger the number, the more detailed information will be returned.
        @param search_word: search word column.
        @param offset: the starting offset of the returning results.
        @param limit: specify the number of the returning results.
        @param tags : the array of IDs of tags.
        """
        action = const.ACTION_DESCRIBE_CLUSTERS
        valid_keys = ['clusters', 'status', 'verbose', 'search_word',
                      'owner', 'offset', 'limit', 'tags', 'role']
        body = filter_out_none(locals(), valid_keys)
        if not self.conn.req_checker.check_params(body,
                                                  required_params=[],
                                                  integer_params=[
                                                      'offset', 'limit'],
                                                  list_params=[
                                                      'clusters', 'status', 'tags']
                                                  ):
            return None

        return self.conn.send_request(action, body)

    def modify_alarm_policy_rule_attributes(self, alarm_policy_rule,
                                            condition_type,
                                            thresholds=None,
                                            alarm_policy_rule_name=None,
                                            data_processor=None,
                                            consecutive_periods=None,
                                            **ignore):
        """ Modify alarm policy rule attributes.
        @param alarm_policy_rule: the ID of the alarm policy rule whose content you
                               want to update.
        @param condition_type: gt for greater than, lt for less than.
        @param thresholds: the thresholds of alarm.
        @param alarm_policy_rule_name: the name of the alarm policy rule.
        @param data_processor: raw for use the monitoring data raw value, percent only for IP bandwidth monitoring.
        @param consecutive_periods: during several consecutive inspection periods, the monitoring data reaches the alarm threshold,
                                    then will trigger the alarm behavior.
        """
        action = const.ACTION_MODIFY_ALARM_POLICY_RULE_ATTRIBUTES
        valid_keys = ['alarm_policy_rule', 'condition_type', 'thresholds',
                      'alarm_policy_rule_name', 'data_processor', 'consecutive_periods']
        body = filter_out_none(locals(), valid_keys)
        if not self.req_checker.check_params(body,
                                             required_params=['alarm_policy_rule', 'condition_type']
                                             ):
            return None

        return self.send_request(action, body)

    def describe_vxnets(self, vxnets=None,
                        search_word=None,
                        verbose=0,
                        owner=None,
                        limit=None,
                        offset=None,
                        tags=None,
                        vxnet_type=None,
                        mode=None,
                        **ignore):
        """ Describe vxnets filtered by condition.
        @param vxnets: the IDs of vxnets you want to describe.
        @param verbose: the number to specify the verbose level, larger the number, the more detailed information will be returned.
        @param offset: the starting offset of the returning results.
        @param limit: specify the number of the returning results.
        @param tags : the array of IDs of tags.
        @param vxnet_type: the vxnet of type you want to describe.
        @param mode: the vxnet mode. 0: gre+ovs, 1: vxlan+bridge.
        """
        action = const.ACTION_DESCRIBE_VXNETS
        valid_keys = ['vxnets', 'search_word', 'verbose', 'limit', 'offset',
                      'tags', 'vxnet_type', 'owner', 'mode']
        body = filter_out_none(locals(), valid_keys)
        if not self.conn.req_checker.check_params(body,
                                                  required_params=[],
                                                  integer_params=[
                                                      'limit', 'offset', 'verbose',
                                                      'vxnet_type', 'mode',
                                                  ],
                                                  list_params=['vxnets', 'tags']
                                                  ):
            return None

        return self.conn.send_request(action, body)

    def resize_instances(self, instances,
                         instance_type=None,
                         cpu=None,
                         memory=None,
                         os_disk_size=None,
                         **ignore):
        """ Resize one or more instances
        @param instances: the IDs of the instances you want to resize.
        @param instance_type: defined by qingcloud.
        See: https://docs.qingcloud.com/api/common/includes/instance_type.html
        @param cpu: cpu core number.
        @param memory: memory size in MB.
        @param os_disk_size: operation system disk size in GB.
        """
        action = const.ACTION_RESIZE_INSTANCES
        valid_keys = ['instances', 'instance_type', 'cpu', 'memory', 'os_disk_size']
        body = filter_out_none(locals(), valid_keys)
        if not self.conn.req_checker.check_params(body,
                                                  required_params=['instances'],
                                                  integer_params=['cpu', 'memory', 'os_disk_size'],
                                                  list_params=['instances']
                                                  ):
            return None

        return self.conn.send_request(action, body)

    def describe_security_group_ipsets(self,
                                       security_group_ipsets=None,
                                       ipset_type=None,
                                       security_group_ipset_name=None,
                                       offset=None,
                                       limit=None,
                                       **ignore):
        """ Describe security group ipsets filtered by condition.
        @param security_group_ipsets: the ID of the security group ipsets.
        @param ipset_type: 0 for ip; 1 for port
        @param security_group_ipset_name: filter by name
        @param offset: the starting offset of the returning results.
        @param limit: specify the number of the returning results.
        """
        action = const.ACTION_DESCRIBE_SECURITY_GROUP_IPSETS
        valid_keys = ['security_group_ipsets', 'ipset_type',
                      'security_group_ipset_name',
                      'offset', 'limit']
        body = filter_out_none(locals(), valid_keys)
        if not self.conn.req_checker.check_params(body,
                                                  required_params=[],
                                                  integer_params=[
                                                      'ipset_type', 'offset', 'limit'],
                                                  list_params=[
                                                      'security_group_rules']
                                                  ):
            return None

        return self.conn.send_request(action, body)

    def modify_security_group_attributes(self, security_group,
                                         security_group_name=None,
                                         description=None,
                                         **ignore):
        """ Modify security group attributes.
        @param security_group: the ID of the security group whose content you
        want to update.
        @param security_group_name: the new group name you want to update.
        @param description: The detailed description of the resource.
        """
        action = const.ACTION_MODIFY_SECURITY_GROUP_ATTRIBUTES
        valid_keys = ['security_group', 'security_group_name', 'description']
        body = filter_out_none(locals(), valid_keys)
        body['security_group'] = security_group
        if not self.conn.req_checker.check_params(body,
                                                  required_params=[
                                                      'security_group'],
                                                  integer_params=[],
                                                  list_params=[]
                                                  ):
            return None

        if not self.conn.req_checker.check_sg_rules(body.get('rules', [])):
            return None

        return self.conn.send_request(action, body)

    def modify_s2_shared_target_attributes(self,
                                           shared_target,
                                           operation,
                                           parameters=None,
                                           initiator_names=None,
                                           s2_group=None,
                                           export_name=None,
                                           **ignore):
        """ Modify S2 shared target attributes

        :param shared_target: the ID of shared target.
        :param operation: valid values includes add, modify, delete, set.
        :param parameters: please refer https://docs.qingcloud.com/api/s2/describle_s2_default_parameters.html
        :param initiator_names: client IQN.
        :param s2_group: the ID of permission group.
        :param export_name: the name of shared target, available in vnas.
        """
        action = const.ACTION_MODIFY_S2_SHARED_TARGET
        valid_keys = [
            'shared_target', 'operation', 'parameters',
            'initiator_names', 's2_group', 'export_name',
        ]
        body = filter_out_none(locals(), valid_keys)
        if not self.conn.req_checker.check_params(
                body,
                list_params=["initiator_names", "parameters"],
        ):
            return None

        return self.conn.send_request(action, body)

    def describe_s2_default_parameters(self,
                                       service_type=None,
                                       target_type=None,
                                       offset=None,
                                       limit=None,
                                       **ignore):
        """ Describe S2 default parameters

        :param service_type: valid values is vsan or vnas.
        :param target_type: valid values is ISCSI, FCoE, NFS or SMB.
        :param offset: the starting offset of the returning results.
        :param limit: specify the number of the returning results.
        """
        action = const.ACTION_DESCRIBE_S2_DEFAULT_PARAMETERS
        valid_keys = [
            'service_type', 'target_type', 'offset', 'limit',
        ]
        body = filter_out_none(locals(), valid_keys)
        if not self.conn.req_checker.check_params(
                body,
                integer_params=['offset', 'limit'],
        ):
            return None

        return self.conn.send_request(action, body)

    def create_s2_server(self,
                         vxnet,
                         service_type,
                         s2_server_name=None,
                         s2_server_type=None,
                         private_ip=None,
                         description=None,
                         s2_class=None,
                         **ignore):
        """ Create S2 server

        :param vxnet: the ID of vxnet.
        :param service_type: valid values is vsan or vnas.
        :param s2_server_name: the name of s2 server.
        :param s2_server_type: valid values includes 0, 1, 2, 3.
        :param private_ip: you may specify the ip address of this server.
        :param description: the detailed description of the resource.
        :param s2_class: valid values includes 0, 1.
        """
        action = const.ACTION_CREATE_S2_SERVER
        valid_keys = [
            'vxnet', 'service_type', 's2_server_name', 's2_server_type',
            'private_ip', 'description', 's2_class',
        ]
        body = filter_out_none(locals(), valid_keys)
        if not self.conn.req_checker.check_params(
                body,
                integer_params=["s2_server_type", "s2_class"],
        ):
            return None

        return self.conn.send_request(action, body)

    def describe_s2_shared_targets(self,
                                   shared_targets=None,
                                   target_types=None,
                                   s2_server_id=None,
                                   export_name=None,
                                   search_word=None,
                                   verbose=None,
                                   offset=None,
                                   limit=None,
                                   **ignore):
        """ Describe S2 servers

        :param shared_targets: the IDs of shared targets.
        :param target_types: valid values includes 'ISCSI', 'FCoE','NFS' and 'SMB'.
        :param s2_server_id: the ID of s2 server.
        :param export_name: the name of shared target.
        :param search_word: you may use this field to search from export_name or description.
        :param verbose: the number to specify the verbose level, larger the number, the more detailed information will be returned.
        :param offset: the starting offset of the returning results.
        :param limit: specify the number of the returning results.
        """
        action = const.ACTION_DESCRIBE_S2_SHARED_TARGETS
        valid_keys = [
            'shared_targets', 'target_types', 's2_server_id', 'export_name',
            'search_word', 'verbose', 'offset', 'limit',
        ]
        body = filter_out_none(locals(), valid_keys)
        if not self.conn.req_checker.check_params(
                body,
                integer_params=["limit", "offset", "verbose"],
                list_params=["shared_targets", "target_types"],
        ):
            return None

        return self.conn.send_request(action, body)

    def create_s2_shared_target(self,
                                s2_server_id,
                                export_name,
                                target_type,
                                description=None,
                                volumes=None,
                                initiator_names=None,
                                **ignore):
        """ Create S2 shared target

        :param s2_server_id: the ID of s2 server.
        :param export_name: the name of shared target.
        :param target_type: valid values includes 'ISCSI', 'FCoE','NFS' and 'SMB'.
        :param description: the detailed description of the resource.
        :param volumes: the IDs of volumes will be attached as backstore.
        :param initiator_names: specify client IQN, available in vsan.
        """
        action = const.ACTION_CREATE_S2_SHARED_TARGET
        valid_keys = [
            's2_server_id', 'export_name', 'target_type',
            'description', 'volumes', 'initiator_names',
        ]
        body = filter_out_none(locals(), valid_keys)
        if not self.conn.req_checker.check_params(
                body,
                list_params=['volumes', 'initiator_names'],
        ):
            return None

        return self.conn.send_request(action, body)

    def create_loadbalancer(self,
                            eips=None,
                            loadbalancer_name=None,
                            security_group=None,
                            node_count=None,
                            loadbalancer_type=const.LB_TYPE_MAXCONN_5k,
                            vxnet=None,
                            private_ip=None,
                            target_user=None,
                            **ignore):
        """ Create new load balancer.
        @param eips: the IDs of the eips that will be associated to load balancer.
        @param loadbalancer_name: the name of the loadbalancer.
        @param security_group: the id of the security_group you want to apply to loadbalancer,
        use `default security` group as default.
        @param target_user: ID of user who will own this resource, should be one of your sub-accounts
        """
        action = const.ACTION_CREATE_LOADBALANCER
        valid_keys = ['eips', 'loadbalancer_name', 'loadbalancer_type',
                      'security_group', 'node_count', 'vxnet', 'private_ip',
                      'target_user',
                      ]
        body = filter_out_none(locals(), valid_keys)
        if not self.conn.req_checker.check_params(body,
                                                  required_params=[],
                                                  integer_params=['node_count'],
                                                  list_params=['eips']
                                                  ):
            return None

        return self.conn.send_request(action, body)

    def describe_loadbalancer_policies(self, loadbalancer_policies=None,
                                       verbose=0,
                                       offset=None,
                                       limit=None,
                                       **ignore):
        """  Describe load balancer policies.
        @param loadbalancer_policies: filter by load balancer policy ID.
        @param verbose: the number to specify the verbose level, larger the number, the more detailed information will be returned.
        @param offset: the starting offset of the returning results.
        @param limit: specify the number of the returning results.
        """

        action = const.ACTION_DESCRIBE_LOADBALANCER_POLICIES
        valid_keys = ['loadbalancer_policies',
                      'verbose', 'offset', 'limit']
        body = filter_out_none(locals(), valid_keys)

        if not self.conn.req_checker.check_params(body,
                                                  required_params=[],
                                                  integer_params=['offset', 'limit'],
                                                  list_params=['loadbalancer_policies']
                                                  ):
            return None

        return self.conn.send_request(action, body)

    def add_security_group_rules(self, security_group,
                                 rules,
                                 target_user=None,
                                 **ignore):
        """ Add rules to security group.
        @param security_group: the ID of the security group whose rules you
        want to add.
        @param rules: a list of rules you want to add,
        can be created by SecurityGroupRuleFactory.
        @param target_user: ID of user who will own this resource, should be one of your sub-accounts
        """
        action = const.ACTION_ADD_SECURITY_GROUP_RULES
        valid_keys = ['security_group', 'rules', 'target_user']
        body = filter_out_none(locals(), valid_keys)
        if not self.conn.req_checker.check_params(body,
                                                  required_params=[
                                                      'security_group', 'rules'],
                                                  integer_params=[],
                                                  list_params=['rules']
                                                  ):
            return None

        if not self.conn.req_checker.check_sg_rules(body.get('rules', [])):
            return None

        return self.conn.send_request(action, body)

    def describe_s2_groups(self,
                           s2_groups=None,
                           group_types=None,
                           group_name=None,
                           search_word=None,
                           verbose=None,
                           offset=None,
                           limit=None,
                           **ignore):
        """ Describe S2 groups

        :param s2_groups: the IDs of s2 groups.
        :param group_types: valid values is NFS_GROUP or SMB_GROUP.
        :param group_name: the name of group.
        :param search_word: you may use this field to search from id or name.
        :param verbose: the number to specify the verbose level, larger the number, the more detailed information will be returned.
        :param offset: the starting offset of the returning results.
        :param limit: specify the number of the returning results.
        """
        action = const.ACTION_DESCRIBE_S2_GROUPS
        valid_keys = [
            's2_groups', 'group_types', 'account_name', 'search_word',
            'verbose', 'offset', 'limit',
        ]
        body = filter_out_none(locals(), valid_keys)
        if not self.conn.req_checker.check_params(
                body,
                integer_params=['offset', 'limit', 'verbose'],
                list_params=['s2_groups', 'group_types'],
        ):
            return None

        return self.conn.send_request(action, body)

    def describe_security_groups(self, security_groups=None,
                                 security_group_name=None,
                                 search_word=None,
                                 owner=None,
                                 verbose=0,
                                 offset=None,
                                 limit=None,
                                 tags=None,
                                 **ignore):
        """ Describe security groups filtered by condition
        @param security_groups: IDs of the security groups you want to describe.
        @param security_group_name: the name of the security group.
        @param verbose: the number to specify the verbose level, larger the number, the more detailed information will be returned.
        @param offset: the starting offset of the returning results.
        @param limit: specify the number of the returning results.
        @param tags : the array of IDs of tags.
        """
        action = const.ACTION_DESCRIBE_SECURITY_GROUPS
        valid_keys = ['security_groups', 'security_group_name', 'search_word',
                      'verbose', 'offset', 'limit', 'tags', 'owner']
        body = filter_out_none(locals(), valid_keys)
        if not self.conn.req_checker.check_params(body,
                                                  required_params=[],
                                                  integer_params=[
                                                      'offset', 'limit', 'verbose'],
                                                  list_params=[
                                                      'security_groups', 'tags']
                                                  ):
            return None

        return self.conn.send_request(action, body)

    def modify_s2_group(self,
                        s2_group,
                        group_name=None,
                        s2_accounts=None,
                        description=None,
                        **ignore):
        """ Modify S2 group

        :param s2_group: the ID of group.
        :param group_name: the name of group.
        :param s2_accounts: the IDs of accounts.
        :param description: the new value of description.
        """
        action = const.ACTION_MODIFY_S2_GROUP
        valid_keys = [
            's2_group', 'group_name', 's2_accounts', 'description',
        ]
        body = filter_out_none(locals(), valid_keys)
        if not self.conn.req_checker.check_params(
                body,
                list_params=['s2_accounts'],
        ):
            return None

        return self.conn.send_request(action, body)

    def modify_security_group_ipset_attributes(self,
                                               security_group_ipset,
                                               security_group_ipset_name=None,
                                               description=None,
                                               val=None,
                                               **ignore):
        """ Modify security group ipset attributes.
        @param security_group_ipset: the ID of the security group ipset whose attributes you
        want to update.
        @param security_group_ipset_name: name of the ipset.
        @param description: The detailed description of the resource.
        @param val1: for "ip", this field is like:  192.168.1.0/24
        for "port", this field is like: 10000-15000
        """
        action = const.ACTION_MODIFY_SECURITY_GROUP_IPSET_ATTRIBUTES
        valid_keys = ['security_group_ipset', 'security_group_ipset_name',
                      'description', 'val']
        body = filter_out_none(locals(), valid_keys)
        if not self.conn.req_checker.check_params(body,
                                                  required_params=[
                                                      'security_group_ipset'],
                                                  integer_params=[],
                                                  list_params=[]
                                                  ):
            return None

        return self.conn.send_request(action, body)

    def create_s2_account(self,
                          account_type,
                          account_name=None,
                          smb_name=None,
                          smb_passwd=None,
                          nfs_ipaddr=None,
                          s2_groups=None,
                          opt_parameters=None,
                          description=None,
                          **ignore):
        """ Create S2 account

        :param account_type: valid values is NFS or SMB.
        :param account_name: the name of account.
        :param smb_name: the user name of smb.
        :param smb_passwd: the password of smb.
        :param nfs_ipaddr: ip address available in NFS.
        :param s2_groups: the JSON form of groups. e.g. '[{"group_id":"s2g-xxxx", "rw_flag": "rw"}]'
        :param opt_parameters: options parameters for NFS.
        :param description: the detailed description of the resource.
        """
        action = const.ACTION_CREATE_S2_ACCOUNT
        valid_keys = [
            'account_type', 'account_name', 'smb_name', 'smb_passwd',
            'nfs_ipaddr', 's2_groups', 'opt_parameters', 'description',
        ]
        body = filter_out_none(locals(), valid_keys)
        if not self.conn.req_checker.check_params(
                body,
                list_params=["s2_groups"],
        ):
            return None

        return self.conn.send_request(action, body)