248 lines
9.0 KiB
Python
248 lines
9.0 KiB
Python
# Copyright 2017 Intel Corporation.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import logging
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from osc_lib.command import command
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from osc_lib import exceptions
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from osc_lib import utils
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from neutronclient._i18n import _
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from neutronclient.osc import utils as nc_osc_utils
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LOG = logging.getLogger(__name__)
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resource = 'service_graph'
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_attr_map = (
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('id', 'ID', nc_osc_utils.LIST_BOTH),
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('name', 'Name', nc_osc_utils.LIST_BOTH),
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('port_chains', 'Branching Points', nc_osc_utils.LIST_BOTH),
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('description', 'Description', nc_osc_utils.LIST_LONG_ONLY),
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('project_id', 'Project', nc_osc_utils.LIST_LONG_ONLY),
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)
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class CreateSfcServiceGraph(command.ShowOne):
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"""Create a service graph."""
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def get_parser(self, prog_name):
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parser = super(CreateSfcServiceGraph, self).get_parser(prog_name)
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parser.add_argument(
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'name',
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metavar='<name>',
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help=_('Name of the service graph.'))
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parser.add_argument(
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'--description',
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help=_('Description for the service graph.'))
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parser.add_argument(
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'--branching-point',
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metavar='SRC_CHAIN:DST_CHAIN_1,DST_CHAIN_2,DST_CHAIN_N',
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dest='branching_points',
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action='append',
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default=[], required=True,
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help=_('Service graph branching point: the key is the source '
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'Port Chain while the value is a list of destination '
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'Port Chains. This option can be repeated.'))
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return parser
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def take_action(self, parsed_args):
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client = self.app.client_manager.neutronclient
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attrs = _get_common_attrs(self.app.client_manager, parsed_args)
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try:
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body = {resource: attrs}
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obj = client.create_sfc_service_graph(body)[resource]
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columns, display_columns = nc_osc_utils.get_columns(obj, _attr_map)
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data = utils.get_dict_properties(obj, columns)
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return display_columns, data
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except Exception as e:
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msg = (_("Failed to create service graph using '%(pcs)s': %(e)s")
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% {'pcs': parsed_args.branching_points, 'e': e})
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raise exceptions.CommandError(msg)
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class SetSfcServiceGraph(command.Command):
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_description = _("Set service graph properties")
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def get_parser(self, prog_name):
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parser = super(SetSfcServiceGraph, self).get_parser(prog_name)
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parser.add_argument(
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'--name',
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metavar='<name>',
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help=_('Name of the service graph'))
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parser.add_argument(
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'--description',
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metavar='<description>',
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help=_('Description for the service graph'))
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parser.add_argument(
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'service_graph',
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metavar='<service-graph>',
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help=_("Service graph to modify (name or ID)")
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)
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return parser
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def take_action(self, parsed_args):
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client = self.app.client_manager.neutronclient
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service_graph_id = _get_id(client, parsed_args.service_graph, resource)
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attrs = _get_common_attrs(self.app.client_manager, parsed_args,
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is_create=False)
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body = {resource: attrs}
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try:
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client.update_sfc_service_graph(service_graph_id, body)
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except Exception as e:
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msg = (_("Failed to update service graph "
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"'%(service_graph)s': %(e)s")
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% {'service_graph': parsed_args.service_graph, 'e': e})
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raise exceptions.CommandError(msg)
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class DeleteSfcServiceGraph(command.Command):
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"""Delete a given service graph."""
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def get_parser(self, prog_name):
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parser = super(DeleteSfcServiceGraph, self).get_parser(prog_name)
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parser.add_argument(
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'service_graph',
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metavar="<service-graph>",
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help=_("ID or name of the service graph to delete.")
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)
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return parser
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def take_action(self, parsed_args):
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client = self.app.client_manager.neutronclient
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id = _get_id(client, parsed_args.service_graph, resource)
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client.delete_sfc_service_graph(id)
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class ListSfcServiceGraph(command.Lister):
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_description = _("List service graphs")
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def get_parser(self, prog_name):
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parser = super(ListSfcServiceGraph, self).get_parser(prog_name)
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parser.add_argument(
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'--long',
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action='store_true',
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default=False,
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help=_("List additional fields in output")
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)
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return parser
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def take_action(self, parsed_args):
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client = self.app.client_manager.neutronclient
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data = client.list_sfc_service_graphs()
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headers, columns = nc_osc_utils.get_column_definitions(
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_attr_map, long_listing=parsed_args.long)
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return (headers,
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(utils.get_dict_properties(s, columns)
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for s in data['service_graphs']))
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class ShowSfcServiceGraph(command.ShowOne):
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"""Show information of a given service graph."""
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def get_parser(self, prog_name):
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parser = super(ShowSfcServiceGraph, self).get_parser(prog_name)
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parser.add_argument(
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'service_graph',
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metavar="<service-graph>",
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help=_("ID or name of the service graph to display.")
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)
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return parser
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def take_action(self, parsed_args):
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client = self.app.client_manager.neutronclient
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sg_id = _get_id(client, parsed_args.service_graph, resource)
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obj = client.show_sfc_service_graph(sg_id)[resource]
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columns, display_columns = nc_osc_utils.get_columns(obj, _attr_map)
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data = utils.get_dict_properties(obj, columns)
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return display_columns, data
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def _get_common_attrs(client_manager, parsed_args, is_create=True):
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attrs = {}
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if parsed_args.name is not None:
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attrs['name'] = str(parsed_args.name)
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if parsed_args.description is not None:
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attrs['description'] = str(parsed_args.description)
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if is_create:
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_get_attrs_for_create(client_manager, attrs, parsed_args)
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return attrs
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def _validate_destination_chains(comma_split, attrs, client_manager, sc_):
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for e in comma_split:
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if e != "":
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dc_ = _get_id(client_manager.neutronclient, e, 'port_chain')
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attrs['port_chains'][sc_].append(dc_)
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if _check_cycle(attrs['port_chains'], sc_, dc_):
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raise(exceptions.CommandError(
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"Error: Service graph contains a cycle"))
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else:
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raise exceptions.CommandError(
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"Error: you must specify at least one "
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"destination chain for each source chain")
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return attrs
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def _check_cycle(graph, new_src, new_dest):
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for src in graph:
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if src == new_dest:
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if _visit(graph, src, new_dest, new_src):
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return True
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return False
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def _visit(graph, src, new_dest, new_src):
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if src in graph:
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found_cycle = False
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for dest in graph[src]:
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if new_src == dest or found_cycle:
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return True
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else:
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found_cycle = _visit(graph, dest, new_dest, new_src)
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return False
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def _get_attrs_for_create(client_manager, attrs, parsed_args):
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if parsed_args.branching_points:
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attrs['port_chains'] = {}
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src_chain = None
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for c in parsed_args.branching_points:
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if ':' not in c:
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raise exceptions.CommandError(
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"Error: You must specify at least one "
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"destination chain for each source chain.")
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colon_split = c.split(':')
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src_chain = colon_split.pop(0)
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sc_ = _get_id(client_manager.neutronclient,
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src_chain, 'port_chain')
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for i in colon_split:
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comma_split = i.split(',')
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unique = set(comma_split)
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if len(unique) != len(comma_split):
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raise exceptions.CommandError(
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"Error: Duplicate "
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"destination chains from "
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"source chain {}".format(src_chain))
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if sc_ in attrs['port_chains']:
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raise exceptions.CommandError(
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"Error: Source chain {} is in "
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"use already ".format(src_chain))
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attrs['port_chains'][sc_] = []
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_validate_destination_chains(
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comma_split, attrs, client_manager, sc_)
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def _get_id(client, id_or_name, resource):
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return client.find_resource(resource, id_or_name)['id']
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