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# Copyright 2017 Intel Corporation.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import logging
from osc_lib.command import command
from osc_lib import exceptions
from osc_lib import utils
from osc_lib.utils import columns as column_util
from neutronclient._i18n import _
LOG = logging.getLogger(__name__)
resource = 'service_graph'
_attr_map = (
('id', 'ID', column_util.LIST_BOTH),
('name', 'Name', column_util.LIST_BOTH),
('port_chains', 'Branching Points', column_util.LIST_BOTH),
('description', 'Description', column_util.LIST_LONG_ONLY),
('project_id', 'Project', column_util.LIST_LONG_ONLY),
)
_attr_map_dict = {
'id': 'ID',
'name': 'Name',
'description': 'Description',
'port_chains': 'Branching Points',
'tenant_id': 'Project',
'project_id': 'Project',
}
class CreateSfcServiceGraph(command.ShowOne):
"""Create a service graph."""
def get_parser(self, prog_name):
parser = super(CreateSfcServiceGraph, self).get_parser(prog_name)
parser.add_argument(
'name',
metavar='<name>',
help=_('Name of the service graph.'))
parser.add_argument(
'--description',
help=_('Description for the service graph.'))
parser.add_argument(
'--branching-point',
metavar='SRC_CHAIN:DST_CHAIN_1,DST_CHAIN_2,DST_CHAIN_N',
dest='branching_points',
action='append',
default=[], required=True,
help=_('Service graph branching point: the key is the source '
'Port Chain while the value is a list of destination '
'Port Chains. This option can be repeated.'))
return parser
def take_action(self, parsed_args):
client = self.app.client_manager.network
attrs = _get_common_attrs(self.app.client_manager, parsed_args)
try:
obj = client.create_sfc_service_graph(**attrs)
display_columns, columns = \
utils.get_osc_show_columns_for_sdk_resource(
obj, _attr_map_dict, ['location', 'tenant_id'])
data = utils.get_dict_properties(obj, columns)
return display_columns, data
except Exception as e:
msg = (_("Failed to create service graph using '%(pcs)s': %(e)s")
% {'pcs': parsed_args.branching_points, 'e': e})
raise exceptions.CommandError(msg)
class SetSfcServiceGraph(command.Command):
_description = _("Set service graph properties")
def get_parser(self, prog_name):
parser = super(SetSfcServiceGraph, self).get_parser(prog_name)
parser.add_argument(
'--name',
metavar='<name>',
help=_('Name of the service graph'))
parser.add_argument(
'--description',
metavar='<description>',
help=_('Description for the service graph'))
parser.add_argument(
'service_graph',
metavar='<service-graph>',
help=_("Service graph to modify (name or ID)")
)
return parser
def take_action(self, parsed_args):
client = self.app.client_manager.network
service_graph_id = client.find_sfc_service_graph(
parsed_args.service_graph, ignore_missing=False)['id']
attrs = _get_common_attrs(self.app.client_manager, parsed_args,
is_create=False)
try:
client.update_sfc_service_graph(service_graph_id, **attrs)
except Exception as e:
msg = (_("Failed to update service graph "
"'%(service_graph)s': %(e)s")
% {'service_graph': parsed_args.service_graph, 'e': e})
raise exceptions.CommandError(msg)
class DeleteSfcServiceGraph(command.Command):
"""Delete a given service graph."""
def get_parser(self, prog_name):
parser = super(DeleteSfcServiceGraph, self).get_parser(prog_name)
parser.add_argument(
'service_graph',
metavar="<service-graph>",
nargs='+',
help=_("ID or name of the service graph(s) to delete.")
)
return parser
def take_action(self, parsed_args):
client = self.app.client_manager.network
result = 0
for sg in parsed_args.service_graph:
try:
sg_id = client.find_sfc_service_graph(
sg, ignore_missing=False)['id']
client.delete_sfc_service_graph(sg_id)
except Exception as e:
result += 1
LOG.error(_("Failed to delete service graph with name "
"or ID '%(sg)s': %(e)s"),
{'sg': sg, 'e': e})
if result > 0:
total = len(parsed_args.service_graph)
msg = (_("%(result)s of %(total)s service graph(s) "
"failed to delete.") % {'result': result,
'total': total})
raise exceptions.CommandError(msg)
class ListSfcServiceGraph(command.Lister):
_description = _("List service graphs")
def get_parser(self, prog_name):
parser = super(ListSfcServiceGraph, self).get_parser(prog_name)
parser.add_argument(
'--long',
action='store_true',
default=False,
help=_("List additional fields in output")
)
return parser
def take_action(self, parsed_args):
client = self.app.client_manager.network
data = client.sfc_service_graphs()
headers, columns = column_util.get_column_definitions(
_attr_map, long_listing=parsed_args.long)
return (headers,
(utils.get_dict_properties(s, columns)
for s in data))
class ShowSfcServiceGraph(command.ShowOne):
"""Show information of a given service graph."""
def get_parser(self, prog_name):
parser = super(ShowSfcServiceGraph, self).get_parser(prog_name)
parser.add_argument(
'service_graph',
metavar="<service-graph>",
help=_("ID or name of the service graph to display.")
)
return parser
def take_action(self, parsed_args):
client = self.app.client_manager.network
sg_id = client.find_sfc_service_graph(parsed_args.service_graph,
ignore_missing=False)['id']
obj = client.get_sfc_service_graph(sg_id)
display_columns, columns = utils.get_osc_show_columns_for_sdk_resource(
obj, _attr_map_dict, ['location', 'tenant_id'])
data = utils.get_dict_properties(obj, columns)
return display_columns, data
def _get_common_attrs(client_manager, parsed_args, is_create=True):
attrs = {}
if parsed_args.name is not None:
attrs['name'] = str(parsed_args.name)
if parsed_args.description is not None:
attrs['description'] = str(parsed_args.description)
if is_create:
_get_attrs_for_create(client_manager, attrs, parsed_args)
return attrs
def _validate_destination_chains(comma_split, attrs, client, sc_):
for e in comma_split:
if e != "":
dc_ = client.find_sfc_port_chain(e, ignore_missing=False)['id']
attrs['port_chains'][sc_].append(dc_)
if _check_cycle(attrs['port_chains'], sc_, dc_):
raise exceptions.CommandError(
"Error: Service graph contains a cycle")
else:
raise exceptions.CommandError(
"Error: you must specify at least one "
"destination chain for each source chain")
return attrs
def _check_cycle(graph, new_src, new_dest):
for src in graph:
if src == new_dest:
if _visit(graph, src, new_dest, new_src):
return True
return False
def _visit(graph, src, new_dest, new_src):
if src in graph:
found_cycle = False
for dest in graph[src]:
if new_src == dest or found_cycle:
return True
else:
found_cycle = _visit(graph, dest, new_dest, new_src)
return False
def _get_attrs_for_create(client_manager, attrs, parsed_args):
client = client_manager.network
if parsed_args.branching_points:
attrs['port_chains'] = {}
src_chain = None
for c in parsed_args.branching_points:
if ':' not in c:
raise exceptions.CommandError(
"Error: You must specify at least one "
"destination chain for each source chain.")
colon_split = c.split(':')
src_chain = colon_split.pop(0)
sc_ = client.find_sfc_port_chain(src_chain,
ignore_missing=False)['id']
for i in colon_split:
comma_split = i.split(',')
unique = set(comma_split)
if len(unique) != len(comma_split):
raise exceptions.CommandError(
"Error: Duplicate "
"destination chains from "
"source chain {}".format(src_chain))
if sc_ in attrs['port_chains']:
raise exceptions.CommandError(
"Error: Source chain {} is in "
"use already ".format(src_chain))
attrs['port_chains'][sc_] = []
_validate_destination_chains(
comma_split, attrs, client, sc_)
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