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"""Classes used in the main application.""" # pylint: disable=too-many-lines |
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from datetime import datetime |
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from threading import Lock |
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from uuid import uuid4 |
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import requests |
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from glom import glom |
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from kytos.core import log |
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from kytos.core.common import EntityStatus, GenericEntity |
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from kytos.core.exceptions import KytosNoTagAvailableError |
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from kytos.core.helpers import get_time, now |
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from kytos.core.interface import UNI |
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from napps.kytos.mef_eline import settings |
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from napps.kytos.mef_eline.exceptions import FlowModException, InvalidPath |
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from napps.kytos.mef_eline.storehouse import StoreHouse |
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from napps.kytos.mef_eline.utils import compare_endpoint_trace, emit_event |
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from .path import Path, DynamicPathManager |
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class EVCBase(GenericEntity): |
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"""Class to represent a circuit.""" |
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read_only_attributes = [ |
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"creation_time", |
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"active", |
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"current_path", |
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"_id", |
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"archived", |
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] |
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attributes_requiring_redeploy = [ |
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"primary_path", |
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"backup_path", |
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"dynamic_backup_path", |
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"queue_id", |
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"priority", |
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] |
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required_attributes = ["name", "uni_a", "uni_z"] |
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def __init__(self, controller, **kwargs): |
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"""Create an EVC instance with the provided parameters. |
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Args: |
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id(str): EVC identifier. Whether it's None an ID will be genereted. |
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Only the first 14 bytes passed will be used. |
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name: represents an EVC name.(Required) |
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uni_a (UNI): Endpoint A for User Network Interface.(Required) |
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uni_z (UNI): Endpoint Z for User Network Interface.(Required) |
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start_date(datetime|str): Date when the EVC was registred. |
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Default is now(). |
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end_date(datetime|str): Final date that the EVC will be fineshed. |
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Default is None. |
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bandwidth(int): Bandwidth used by EVC instance. Default is 0. |
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primary_links(list): Primary links used by evc. Default is [] |
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backup_links(list): Backups links used by evc. Default is [] |
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current_path(list): Circuit being used at the moment if this is an |
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active circuit. Default is []. |
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primary_path(list): primary circuit offered to user IF one or more |
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links were provided. Default is []. |
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backup_path(list): backup circuit offered to the user IF one or |
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more links were provided. Default is []. |
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dynamic_backup_path(bool): Enable computer backup path dynamically. |
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Dafault is False. |
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creation_time(datetime|str): datetime when the circuit should be |
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activated. default is now(). |
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enabled(Boolean): attribute to indicate the administrative state; |
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default is False. |
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active(Boolean): attribute to indicate the operational state; |
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default is False. |
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archived(Boolean): indicate the EVC has been deleted and is |
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archived; default is False. |
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owner(str): The EVC owner. Default is None. |
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priority(int): Service level provided in the request. Default is 0. |
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Raises: |
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ValueError: raised when object attributes are invalid. |
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""" |
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self._validate(**kwargs) |
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super().__init__() |
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# required attributes |
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self._id = kwargs.get("id", uuid4().hex)[:14] |
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self.uni_a = kwargs.get("uni_a") |
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self.uni_z = kwargs.get("uni_z") |
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self.name = kwargs.get("name") |
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# optional attributes |
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self.start_date = get_time(kwargs.get("start_date")) or now() |
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self.end_date = get_time(kwargs.get("end_date")) or None |
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self.queue_id = kwargs.get("queue_id", None) |
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self.bandwidth = kwargs.get("bandwidth", 0) |
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self.primary_links = Path(kwargs.get("primary_links", [])) |
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self.backup_links = Path(kwargs.get("backup_links", [])) |
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self.current_path = Path(kwargs.get("current_path", [])) |
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self.primary_path = Path(kwargs.get("primary_path", [])) |
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self.backup_path = Path(kwargs.get("backup_path", [])) |
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self.dynamic_backup_path = kwargs.get("dynamic_backup_path", False) |
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self.creation_time = get_time(kwargs.get("creation_time")) or now() |
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self.owner = kwargs.get("owner", None) |
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self.priority = kwargs.get("priority", -1) |
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self.circuit_scheduler = kwargs.get("circuit_scheduler", []) |
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self.current_links_cache = set() |
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self.primary_links_cache = set() |
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self.backup_links_cache = set() |
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self.lock = Lock() |
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self.archived = kwargs.get("archived", False) |
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self.metadata = kwargs.get("metadata", {}) |
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self._storehouse = StoreHouse(controller) |
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self._controller = controller |
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if kwargs.get("active", False): |
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self.activate() |
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else: |
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self.deactivate() |
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if kwargs.get("enabled", False): |
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self.enable() |
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else: |
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self.disable() |
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# datetime of user request for a EVC (or datetime when object was |
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# created) |
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self.request_time = kwargs.get("request_time", now()) |
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# dict with the user original request (input) |
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self._requested = kwargs |
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def sync(self): |
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"""Sync this EVC in the storehouse.""" |
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self._storehouse.save_evc(self) |
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log.info(f"EVC {self.id} was synced to the storehouse.") |
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def update(self, **kwargs): |
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"""Update evc attributes. |
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This method will raises an error trying to change the following |
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attributes: [name, uni_a and uni_z] |
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Returns: |
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the values for enable and a redeploy attribute, if exists and None |
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otherwise |
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Raises: |
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ValueError: message with error detail. |
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""" |
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enable, redeploy = (None, None) |
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uni_a = kwargs.get("uni_a") or self.uni_a |
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uni_z = kwargs.get("uni_z") or self.uni_z |
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for attribute, value in kwargs.items(): |
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if attribute in self.read_only_attributes: |
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raise ValueError(f"{attribute} can't be updated.") |
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if not hasattr(self, attribute): |
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raise ValueError(f'The attribute "{attribute}" is invalid.') |
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if attribute in ("primary_path", "backup_path"): |
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try: |
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value.is_valid( |
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uni_a.interface.switch, uni_z.interface.switch |
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) |
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except InvalidPath as exception: |
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raise ValueError( |
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f"{attribute} is not a " f"valid path: {exception}" |
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) |
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for attribute, value in kwargs.items(): |
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if attribute in ("enable", "enabled"): |
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if value: |
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self.enable() |
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else: |
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self.disable() |
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enable = value |
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else: |
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setattr(self, attribute, value) |
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if attribute in self.attributes_requiring_redeploy: |
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redeploy = value |
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self.sync() |
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return enable, redeploy |
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def __repr__(self): |
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"""Repr method.""" |
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return f"EVC({self._id}, {self.name})" |
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def _validate(self, **kwargs): |
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"""Do Basic validations. |
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Verify required attributes: name, uni_a, uni_z |
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Verify if the attributes uni_a and uni_z are valid. |
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Raises: |
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ValueError: message with error detail. |
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""" |
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for attribute in self.required_attributes: |
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if attribute not in kwargs: |
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raise ValueError(f"{attribute} is required.") |
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if "uni" in attribute: |
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uni = kwargs.get(attribute) |
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if not isinstance(uni, UNI): |
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raise ValueError(f"{attribute} is an invalid UNI.") |
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if not uni.is_valid(): |
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tag = uni.user_tag.value |
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message = f"VLAN tag {tag} is not available in {attribute}" |
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raise ValueError(message) |
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def __eq__(self, other): |
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"""Override the default implementation.""" |
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if not isinstance(other, EVC): |
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return False |
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attrs_to_compare = ["name", "uni_a", "uni_z", "owner", "bandwidth"] |
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for attribute in attrs_to_compare: |
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if getattr(other, attribute) != getattr(self, attribute): |
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return False |
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return True |
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def shares_uni(self, other): |
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"""Check if two EVCs share an UNI.""" |
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if other.uni_a in (self.uni_a, self.uni_z) or other.uni_z in ( |
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self.uni_a, |
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self.uni_z, |
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): |
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return True |
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return False |
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def as_dict(self): |
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"""Return a dictionary representing an EVC object.""" |
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evc_dict = { |
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"id": self.id, |
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"name": self.name, |
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"uni_a": self.uni_a.as_dict(), |
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"uni_z": self.uni_z.as_dict(), |
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} |
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time_fmt = "%Y-%m-%dT%H:%M:%S" |
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evc_dict["start_date"] = self.start_date |
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if isinstance(self.start_date, datetime): |
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evc_dict["start_date"] = self.start_date.strftime(time_fmt) |
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evc_dict["end_date"] = self.end_date |
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if isinstance(self.end_date, datetime): |
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evc_dict["end_date"] = self.end_date.strftime(time_fmt) |
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evc_dict["queue_id"] = self.queue_id |
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evc_dict["bandwidth"] = self.bandwidth |
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evc_dict["primary_links"] = self.primary_links.as_dict() |
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evc_dict["backup_links"] = self.backup_links.as_dict() |
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evc_dict["current_path"] = self.current_path.as_dict() |
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evc_dict["primary_path"] = self.primary_path.as_dict() |
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evc_dict["backup_path"] = self.backup_path.as_dict() |
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evc_dict["dynamic_backup_path"] = self.dynamic_backup_path |
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evc_dict["metadata"] = self.metadata |
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# if self._requested: |
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# request_dict = self._requested.copy() |
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# request_dict['uni_a'] = request_dict['uni_a'].as_dict() |
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# request_dict['uni_z'] = request_dict['uni_z'].as_dict() |
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# request_dict['circuit_scheduler'] = self.circuit_scheduler |
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# evc_dict['_requested'] = request_dict |
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evc_dict["request_time"] = self.request_time |
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if isinstance(self.request_time, datetime): |
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1 |
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evc_dict["request_time"] = self.request_time.strftime(time_fmt) |
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time = self.creation_time.strftime(time_fmt) |
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evc_dict["creation_time"] = time |
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evc_dict["owner"] = self.owner |
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evc_dict["circuit_scheduler"] = [ |
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sc.as_dict() for sc in self.circuit_scheduler |
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] |
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evc_dict["active"] = self.is_active() |
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evc_dict["enabled"] = self.is_enabled() |
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evc_dict["archived"] = self.archived |
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evc_dict["priority"] = self.priority |
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return evc_dict |
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287
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@property |
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def id(self): # pylint: disable=invalid-name |
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"""Return this EVC's ID.""" |
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return self._id |
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1 |
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def archive(self): |
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293
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"""Archive this EVC on deletion.""" |
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1 |
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self.archived = True |
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297
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# pylint: disable=fixme, too-many-public-methods |
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1 |
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class EVCDeploy(EVCBase): |
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299
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"""Class to handle the deploy procedures.""" |
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300
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301
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def create(self): |
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302
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"""Create a EVC.""" |
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303
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304
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1 |
|
def discover_new_paths(self): |
|
305
|
|
|
"""Discover new paths to satisfy this circuit and deploy it.""" |
|
306
|
|
|
return DynamicPathManager.get_best_paths(self) |
|
307
|
|
|
|
|
308
|
1 |
|
def change_path(self): |
|
309
|
|
|
"""Change EVC path.""" |
|
310
|
|
|
|
|
311
|
1 |
|
def reprovision(self): |
|
312
|
|
|
"""Force the EVC (re-)provisioning.""" |
|
313
|
|
|
|
|
314
|
1 |
|
def is_affected_by_link(self, link): |
|
315
|
|
|
"""Return True if this EVC has the given link on its current path.""" |
|
316
|
|
|
return link in self.current_path |
|
317
|
|
|
|
|
318
|
1 |
|
def link_affected_by_interface(self, interface): |
|
319
|
|
|
"""Return True if this EVC has the given link on its current path.""" |
|
320
|
|
|
return self.current_path.link_affected_by_interface(interface) |
|
321
|
|
|
|
|
322
|
1 |
|
def is_backup_path_affected_by_link(self, link): |
|
323
|
|
|
"""Return True if the backup path of this EVC uses the given link.""" |
|
324
|
|
|
return link in self.backup_path |
|
325
|
|
|
|
|
326
|
|
|
# pylint: disable=invalid-name |
|
327
|
1 |
|
def is_primary_path_affected_by_link(self, link): |
|
328
|
|
|
"""Return True if the primary path of this EVC uses the given link.""" |
|
329
|
|
|
return link in self.primary_path |
|
330
|
|
|
|
|
331
|
1 |
|
def is_using_primary_path(self): |
|
332
|
|
|
"""Verify if the current deployed path is self.primary_path.""" |
|
333
|
|
|
return self.primary_path and (self.current_path == self.primary_path) |
|
334
|
|
|
|
|
335
|
1 |
|
def is_using_backup_path(self): |
|
336
|
|
|
"""Verify if the current deployed path is self.backup_path.""" |
|
337
|
|
|
return self.backup_path and (self.current_path == self.backup_path) |
|
338
|
|
|
|
|
339
|
1 |
|
def is_using_dynamic_path(self): |
|
340
|
|
|
"""Verify if the current deployed path is a dynamic path.""" |
|
341
|
|
|
if ( |
|
342
|
|
|
self.current_path |
|
343
|
|
|
and not self.is_using_primary_path() |
|
344
|
|
|
and not self.is_using_backup_path() |
|
345
|
|
|
and self.current_path.status == EntityStatus.UP |
|
346
|
|
|
): |
|
347
|
|
|
return True |
|
348
|
|
|
return False |
|
349
|
|
|
|
|
350
|
1 |
|
def deploy_to_backup_path(self): |
|
351
|
|
|
"""Deploy the backup path into the datapaths of this circuit. |
|
352
|
|
|
|
|
353
|
|
|
If the backup_path attribute is valid and up, this method will try to |
|
354
|
|
|
deploy this backup_path. |
|
355
|
|
|
|
|
356
|
|
|
If everything fails and dynamic_backup_path is True, then tries to |
|
357
|
|
|
deploy a dynamic path. |
|
358
|
|
|
""" |
|
359
|
|
|
# TODO: Remove flows from current (cookies) |
|
360
|
1 |
|
if self.is_using_backup_path(): |
|
361
|
|
|
# TODO: Log to say that cannot move backup to backup |
|
362
|
|
|
return True |
|
363
|
|
|
|
|
364
|
1 |
|
success = False |
|
365
|
1 |
|
if self.backup_path.status is EntityStatus.UP: |
|
366
|
1 |
|
success = self.deploy_to_path(self.backup_path) |
|
367
|
|
|
|
|
368
|
1 |
|
if success: |
|
369
|
1 |
|
return True |
|
370
|
|
|
|
|
371
|
1 |
|
if ( |
|
372
|
|
|
self.dynamic_backup_path |
|
373
|
|
|
or self.uni_a.interface.switch == self.uni_z.interface.switch |
|
374
|
|
|
): |
|
375
|
1 |
|
return self.deploy_to_path() |
|
376
|
|
|
|
|
377
|
|
|
return False |
|
378
|
|
|
|
|
379
|
1 |
|
def deploy_to_primary_path(self): |
|
380
|
|
|
"""Deploy the primary path into the datapaths of this circuit. |
|
381
|
|
|
|
|
382
|
|
|
If the primary_path attribute is valid and up, this method will try to |
|
383
|
|
|
deploy this primary_path. |
|
384
|
|
|
""" |
|
385
|
|
|
# TODO: Remove flows from current (cookies) |
|
386
|
1 |
|
if self.is_using_primary_path(): |
|
387
|
|
|
# TODO: Log to say that cannot move primary to primary |
|
388
|
|
|
return True |
|
389
|
|
|
|
|
390
|
1 |
|
if self.primary_path.status is EntityStatus.UP: |
|
391
|
1 |
|
return self.deploy_to_path(self.primary_path) |
|
392
|
|
|
return False |
|
393
|
|
|
|
|
394
|
1 |
|
def deploy(self): |
|
395
|
|
|
"""Deploy EVC to best path. |
|
396
|
|
|
|
|
397
|
|
|
Best path can be the primary path, if available. If not, the backup |
|
398
|
|
|
path, and, if it is also not available, a dynamic path. |
|
399
|
|
|
""" |
|
400
|
|
|
if self.archived: |
|
401
|
|
|
return False |
|
402
|
|
|
self.enable() |
|
403
|
|
|
success = self.deploy_to_primary_path() |
|
404
|
|
|
if not success: |
|
405
|
|
|
success = self.deploy_to_backup_path() |
|
406
|
|
|
|
|
407
|
|
|
if success: |
|
408
|
|
|
emit_event(self._controller, "deployed", evc_id=self.id) |
|
409
|
|
|
return success |
|
410
|
|
|
|
|
411
|
1 |
|
@staticmethod |
|
412
|
|
|
def get_path_status(path): |
|
413
|
|
|
"""Check for the current status of a path. |
|
414
|
|
|
|
|
415
|
|
|
If any link in this path is down, the path is considered down. |
|
416
|
|
|
""" |
|
417
|
|
|
if not path: |
|
418
|
|
|
return EntityStatus.DISABLED |
|
419
|
|
|
|
|
420
|
|
|
for link in path: |
|
421
|
|
|
if link.status is not EntityStatus.UP: |
|
422
|
|
|
return link.status |
|
423
|
|
|
return EntityStatus.UP |
|
424
|
|
|
|
|
425
|
|
|
# def discover_new_path(self): |
|
426
|
|
|
# # TODO: discover a new path to satisfy this circuit and deploy |
|
427
|
|
|
|
|
428
|
1 |
|
def remove(self): |
|
429
|
|
|
"""Remove EVC path and disable it.""" |
|
430
|
|
|
self.remove_current_flows() |
|
431
|
|
|
self.disable() |
|
432
|
|
|
self.sync() |
|
433
|
|
|
emit_event(self._controller, "undeployed", evc_id=self.id) |
|
434
|
|
|
|
|
435
|
1 |
|
def remove_current_flows(self, current_path=None, force=True): |
|
436
|
|
|
"""Remove all flows from current path.""" |
|
437
|
1 |
|
switches = set() |
|
438
|
|
|
|
|
439
|
1 |
|
switches.add(self.uni_a.interface.switch) |
|
440
|
1 |
|
switches.add(self.uni_z.interface.switch) |
|
441
|
1 |
|
if not current_path: |
|
442
|
1 |
|
current_path = self.current_path |
|
443
|
1 |
|
for link in current_path: |
|
444
|
1 |
|
switches.add(link.endpoint_a.switch) |
|
445
|
1 |
|
switches.add(link.endpoint_b.switch) |
|
446
|
|
|
|
|
447
|
1 |
|
match = { |
|
448
|
|
|
"cookie": self.get_cookie(), |
|
449
|
|
|
"cookie_mask": 18446744073709551615, |
|
450
|
|
|
} |
|
451
|
|
|
|
|
452
|
1 |
|
for switch in switches: |
|
453
|
1 |
|
try: |
|
454
|
1 |
|
self._send_flow_mods(switch, [match], 'delete', force=force) |
|
455
|
|
|
except FlowModException: |
|
456
|
|
|
log.error( |
|
457
|
|
|
f"Error removing flows from switch {switch.id} for" |
|
458
|
|
|
f"EVC {self}" |
|
459
|
|
|
) |
|
460
|
|
|
|
|
461
|
1 |
|
current_path.make_vlans_available() |
|
462
|
1 |
|
self.current_path = Path([]) |
|
463
|
1 |
|
self.deactivate() |
|
464
|
1 |
|
self.sync() |
|
465
|
|
|
|
|
466
|
1 |
|
@staticmethod |
|
467
|
1 |
|
def links_zipped(path=None): |
|
468
|
|
|
"""Return an iterator which yields pairs of links in order.""" |
|
469
|
1 |
|
if not path: |
|
470
|
|
|
return [] |
|
471
|
1 |
|
return zip(path[:-1], path[1:]) |
|
472
|
|
|
|
|
473
|
1 |
|
def should_deploy(self, path=None): |
|
474
|
|
|
"""Verify if the circuit should be deployed.""" |
|
475
|
1 |
|
if not path: |
|
476
|
1 |
|
log.debug("Path is empty.") |
|
477
|
1 |
|
return False |
|
478
|
|
|
|
|
479
|
1 |
|
if not self.is_enabled(): |
|
480
|
1 |
|
log.debug(f"{self} is disabled.") |
|
481
|
1 |
|
return False |
|
482
|
|
|
|
|
483
|
1 |
|
if not self.is_active(): |
|
484
|
1 |
|
log.debug(f"{self} will be deployed.") |
|
485
|
1 |
|
return True |
|
486
|
|
|
|
|
487
|
1 |
|
return False |
|
488
|
|
|
|
|
489
|
1 |
|
def deploy_to_path(self, path=None): |
|
490
|
|
|
"""Install the flows for this circuit. |
|
491
|
|
|
|
|
492
|
|
|
Procedures to deploy: |
|
493
|
|
|
|
|
494
|
|
|
0. Remove current flows installed |
|
495
|
|
|
1. Decide if will deploy "path" or discover a new path |
|
496
|
|
|
2. Choose vlan |
|
497
|
|
|
3. Install NNI flows |
|
498
|
|
|
4. Install UNI flows |
|
499
|
|
|
5. Activate |
|
500
|
|
|
6. Update current_path |
|
501
|
|
|
7. Update links caches(primary, current, backup) |
|
502
|
|
|
|
|
503
|
|
|
""" |
|
504
|
1 |
|
self.remove_current_flows() |
|
505
|
1 |
|
use_path = path |
|
506
|
1 |
|
if self.should_deploy(use_path): |
|
507
|
1 |
|
try: |
|
508
|
1 |
|
use_path.choose_vlans() |
|
509
|
|
|
except KytosNoTagAvailableError: |
|
510
|
|
|
use_path = None |
|
511
|
|
|
else: |
|
512
|
1 |
|
for use_path in self.discover_new_paths(): |
|
513
|
1 |
|
if use_path is None: |
|
514
|
|
|
continue |
|
515
|
1 |
|
try: |
|
516
|
1 |
|
use_path.choose_vlans() |
|
517
|
1 |
|
break |
|
518
|
|
|
except KytosNoTagAvailableError: |
|
519
|
|
|
pass |
|
520
|
|
|
else: |
|
521
|
1 |
|
use_path = None |
|
522
|
|
|
|
|
523
|
1 |
|
try: |
|
524
|
1 |
|
if use_path: |
|
525
|
1 |
|
self._install_nni_flows(use_path) |
|
526
|
1 |
|
self._install_uni_flows(use_path) |
|
527
|
1 |
|
elif self.uni_a.interface.switch == self.uni_z.interface.switch: |
|
528
|
|
|
use_path = Path() |
|
529
|
|
|
self._install_direct_uni_flows() |
|
530
|
|
|
else: |
|
531
|
1 |
|
log.warn( |
|
532
|
|
|
f"{self} was not deployed. " "No available path was found." |
|
533
|
|
|
) |
|
534
|
1 |
|
return False |
|
535
|
1 |
|
except FlowModException: |
|
536
|
1 |
|
log.error(f"Error deploying EVC {self} when calling flow_manager.") |
|
537
|
1 |
|
self.remove_current_flows(use_path) |
|
538
|
1 |
|
return False |
|
539
|
1 |
|
self.activate() |
|
540
|
1 |
|
self.current_path = use_path |
|
541
|
1 |
|
self.sync() |
|
542
|
1 |
|
log.info(f"{self} was deployed.") |
|
543
|
1 |
|
return True |
|
544
|
|
|
|
|
545
|
1 |
|
def _install_direct_uni_flows(self): |
|
546
|
|
|
"""Install flows connecting two UNIs. |
|
547
|
|
|
|
|
548
|
|
|
This case happens when the circuit is between UNIs in the |
|
549
|
|
|
same switch. |
|
550
|
|
|
""" |
|
551
|
|
|
vlan_a = self.uni_a.user_tag.value if self.uni_a.user_tag else None |
|
552
|
|
|
vlan_z = self.uni_z.user_tag.value if self.uni_z.user_tag else None |
|
553
|
|
|
|
|
554
|
|
|
flow_mod_az = self._prepare_flow_mod( |
|
555
|
|
|
self.uni_a.interface, self.uni_z.interface, self.queue_id |
|
556
|
|
|
) |
|
557
|
|
|
flow_mod_za = self._prepare_flow_mod( |
|
558
|
|
|
self.uni_z.interface, self.uni_a.interface, self.queue_id |
|
559
|
|
|
) |
|
560
|
|
|
|
|
561
|
|
|
if vlan_a and vlan_z: |
|
562
|
|
|
flow_mod_az["match"]["dl_vlan"] = vlan_a |
|
563
|
|
|
flow_mod_za["match"]["dl_vlan"] = vlan_z |
|
564
|
|
|
flow_mod_az["actions"].insert( |
|
565
|
|
|
0, {"action_type": "set_vlan", "vlan_id": vlan_z} |
|
566
|
|
|
) |
|
567
|
|
|
flow_mod_za["actions"].insert( |
|
568
|
|
|
0, {"action_type": "set_vlan", "vlan_id": vlan_a} |
|
569
|
|
|
) |
|
570
|
|
|
elif vlan_a: |
|
571
|
|
|
flow_mod_az["match"]["dl_vlan"] = vlan_a |
|
572
|
|
|
flow_mod_az["actions"].insert(0, {"action_type": "pop_vlan"}) |
|
573
|
|
|
flow_mod_za["actions"].insert( |
|
574
|
|
|
0, {"action_type": "set_vlan", "vlan_id": vlan_a} |
|
575
|
|
|
) |
|
576
|
|
|
elif vlan_z: |
|
577
|
|
|
flow_mod_za["match"]["dl_vlan"] = vlan_z |
|
578
|
|
|
flow_mod_za["actions"].insert(0, {"action_type": "pop_vlan"}) |
|
579
|
|
|
flow_mod_az["actions"].insert( |
|
580
|
|
|
0, {"action_type": "set_vlan", "vlan_id": vlan_z} |
|
581
|
|
|
) |
|
582
|
|
|
self._send_flow_mods( |
|
583
|
|
|
self.uni_a.interface.switch, [flow_mod_az, flow_mod_za] |
|
584
|
|
|
) |
|
585
|
|
|
|
|
586
|
1 |
|
def _install_nni_flows(self, path=None): |
|
587
|
|
|
"""Install NNI flows.""" |
|
588
|
1 |
|
for incoming, outcoming in self.links_zipped(path): |
|
589
|
1 |
|
in_vlan = incoming.get_metadata("s_vlan").value |
|
590
|
1 |
|
out_vlan = outcoming.get_metadata("s_vlan").value |
|
591
|
|
|
|
|
592
|
1 |
|
flows = [] |
|
593
|
|
|
# Flow for one direction |
|
594
|
1 |
|
flows.append( |
|
595
|
|
|
self._prepare_nni_flow( |
|
596
|
|
|
incoming.endpoint_b, |
|
597
|
|
|
outcoming.endpoint_a, |
|
598
|
|
|
in_vlan, |
|
599
|
|
|
out_vlan, |
|
600
|
|
|
queue_id=self.queue_id, |
|
601
|
|
|
) |
|
602
|
|
|
) |
|
603
|
|
|
|
|
604
|
|
|
# Flow for the other direction |
|
605
|
1 |
|
flows.append( |
|
606
|
|
|
self._prepare_nni_flow( |
|
607
|
|
|
outcoming.endpoint_a, |
|
608
|
|
|
incoming.endpoint_b, |
|
609
|
|
|
out_vlan, |
|
610
|
|
|
in_vlan, |
|
611
|
|
|
queue_id=self.queue_id, |
|
612
|
|
|
) |
|
613
|
|
|
) |
|
614
|
1 |
|
self._send_flow_mods(incoming.endpoint_b.switch, flows) |
|
615
|
|
|
|
|
616
|
1 |
|
def _install_uni_flows(self, path=None): |
|
617
|
|
|
"""Install UNI flows.""" |
|
618
|
1 |
|
if not path: |
|
619
|
|
|
log.info("install uni flows without path.") |
|
620
|
|
|
return |
|
621
|
|
|
|
|
622
|
|
|
# Determine VLANs |
|
623
|
1 |
|
in_vlan_a = self.uni_a.user_tag.value if self.uni_a.user_tag else None |
|
624
|
1 |
|
out_vlan_a = path[0].get_metadata("s_vlan").value |
|
625
|
|
|
|
|
626
|
1 |
|
in_vlan_z = self.uni_z.user_tag.value if self.uni_z.user_tag else None |
|
627
|
1 |
|
out_vlan_z = path[-1].get_metadata("s_vlan").value |
|
628
|
|
|
|
|
629
|
|
|
# Flows for the first UNI |
|
630
|
1 |
|
flows_a = [] |
|
631
|
|
|
|
|
632
|
|
|
# Flow for one direction, pushing the service tag |
|
633
|
1 |
|
push_flow = self._prepare_push_flow( |
|
634
|
|
|
self.uni_a.interface, |
|
635
|
|
|
path[0].endpoint_a, |
|
636
|
|
|
in_vlan_a, |
|
637
|
|
|
out_vlan_a, |
|
638
|
|
|
queue_id=self.queue_id, |
|
639
|
|
|
) |
|
640
|
1 |
|
flows_a.append(push_flow) |
|
641
|
|
|
|
|
642
|
|
|
# Flow for the other direction, popping the service tag |
|
643
|
1 |
|
pop_flow = self._prepare_pop_flow( |
|
644
|
|
|
path[0].endpoint_a, |
|
645
|
|
|
self.uni_a.interface, |
|
646
|
|
|
in_vlan_a, |
|
647
|
|
|
out_vlan_a, |
|
648
|
|
|
queue_id=self.queue_id, |
|
649
|
|
|
) |
|
650
|
1 |
|
flows_a.append(pop_flow) |
|
651
|
|
|
|
|
652
|
1 |
|
self._send_flow_mods(self.uni_a.interface.switch, flows_a) |
|
653
|
|
|
|
|
654
|
|
|
# Flows for the second UNI |
|
655
|
1 |
|
flows_z = [] |
|
656
|
|
|
|
|
657
|
|
|
# Flow for one direction, pushing the service tag |
|
658
|
1 |
|
push_flow = self._prepare_push_flow( |
|
659
|
|
|
self.uni_z.interface, |
|
660
|
|
|
path[-1].endpoint_b, |
|
661
|
|
|
in_vlan_z, |
|
662
|
|
|
out_vlan_z, |
|
663
|
|
|
queue_id=self.queue_id, |
|
664
|
|
|
) |
|
665
|
1 |
|
flows_z.append(push_flow) |
|
666
|
|
|
|
|
667
|
|
|
# Flow for the other direction, popping the service tag |
|
668
|
1 |
|
pop_flow = self._prepare_pop_flow( |
|
669
|
|
|
path[-1].endpoint_b, |
|
670
|
|
|
self.uni_z.interface, |
|
671
|
|
|
in_vlan_z, |
|
672
|
|
|
out_vlan_z, |
|
673
|
|
|
queue_id=self.queue_id, |
|
674
|
|
|
) |
|
675
|
1 |
|
flows_z.append(pop_flow) |
|
676
|
|
|
|
|
677
|
1 |
|
self._send_flow_mods(self.uni_z.interface.switch, flows_z) |
|
678
|
|
|
|
|
679
|
1 |
|
@staticmethod |
|
680
|
1 |
|
def _send_flow_mods(switch, flow_mods, command='flows', force=False): |
|
681
|
|
|
"""Send a flow_mod list to a specific switch. |
|
682
|
|
|
|
|
683
|
|
|
Args: |
|
684
|
|
|
switch(Switch): The target of flows. |
|
685
|
|
|
flow_mods(dict): Python dictionary with flow_mods. |
|
686
|
|
|
command(str): By default is 'flows'. To remove a flow is 'remove'. |
|
687
|
|
|
force(bool): True to send via consistency check in case of conn errors |
|
688
|
|
|
|
|
689
|
|
|
""" |
|
690
|
1 |
|
endpoint = f"{settings.MANAGER_URL}/{command}/{switch.id}" |
|
691
|
|
|
|
|
692
|
1 |
|
data = {"flows": flow_mods, "force": force} |
|
693
|
1 |
|
response = requests.post(endpoint, json=data) |
|
694
|
1 |
|
if response.status_code >= 400: |
|
695
|
|
|
raise FlowModException |
|
696
|
|
|
|
|
697
|
1 |
|
def get_cookie(self): |
|
698
|
|
|
"""Return the cookie integer from evc id.""" |
|
699
|
1 |
|
return int(self.id, 16) + (settings.COOKIE_PREFIX << 56) |
|
700
|
|
|
|
|
701
|
1 |
|
@staticmethod |
|
702
|
|
|
def get_id_from_cookie(cookie): |
|
703
|
|
|
"""Return the evc id given a cookie value.""" |
|
704
|
1 |
|
evc_id = cookie - (settings.COOKIE_PREFIX << 56) |
|
705
|
1 |
|
return f"{evc_id:x}" |
|
706
|
|
|
|
|
707
|
1 |
|
def _prepare_flow_mod(self, in_interface, out_interface, queue_id=None): |
|
708
|
|
|
"""Prepare a common flow mod.""" |
|
709
|
1 |
|
default_actions = [ |
|
710
|
|
|
{"action_type": "output", "port": out_interface.port_number} |
|
711
|
|
|
] |
|
712
|
1 |
|
if queue_id: |
|
713
|
|
|
default_actions.append( |
|
714
|
|
|
{"action_type": "set_queue", "queue_id": queue_id} |
|
715
|
|
|
) |
|
716
|
|
|
|
|
717
|
1 |
|
flow_mod = { |
|
718
|
|
|
"match": {"in_port": in_interface.port_number}, |
|
719
|
|
|
"cookie": self.get_cookie(), |
|
720
|
|
|
"actions": default_actions, |
|
721
|
|
|
} |
|
722
|
1 |
|
if self.priority > -1: |
|
723
|
|
|
flow_mod["priority"] = self.priority |
|
724
|
|
|
|
|
725
|
1 |
|
return flow_mod |
|
726
|
|
|
|
|
727
|
1 |
|
def _prepare_nni_flow(self, *args, queue_id=None): |
|
728
|
|
|
"""Create NNI flows.""" |
|
729
|
1 |
|
in_interface, out_interface, in_vlan, out_vlan = args |
|
730
|
1 |
|
flow_mod = self._prepare_flow_mod( |
|
731
|
|
|
in_interface, out_interface, queue_id |
|
732
|
|
|
) |
|
733
|
1 |
|
flow_mod["match"]["dl_vlan"] = in_vlan |
|
734
|
|
|
|
|
735
|
1 |
|
new_action = {"action_type": "set_vlan", "vlan_id": out_vlan} |
|
736
|
1 |
|
flow_mod["actions"].insert(0, new_action) |
|
737
|
|
|
|
|
738
|
1 |
|
return flow_mod |
|
739
|
|
|
|
|
740
|
1 |
View Code Duplication |
def _prepare_push_flow(self, *args, queue_id=None): |
|
|
|
|
|
|
741
|
|
|
"""Prepare push flow. |
|
742
|
|
|
|
|
743
|
|
|
Arguments: |
|
744
|
|
|
in_interface(str): Interface input. |
|
745
|
|
|
out_interface(str): Interface output. |
|
746
|
|
|
in_vlan(str): Vlan input. |
|
747
|
|
|
out_vlan(str): Vlan output. |
|
748
|
|
|
|
|
749
|
|
|
Return: |
|
750
|
|
|
dict: An python dictionary representing a FlowMod |
|
751
|
|
|
|
|
752
|
|
|
""" |
|
753
|
|
|
# assign all arguments |
|
754
|
1 |
|
in_interface, out_interface, in_vlan, out_vlan = args |
|
755
|
|
|
|
|
756
|
1 |
|
flow_mod = self._prepare_flow_mod( |
|
757
|
|
|
in_interface, out_interface, queue_id |
|
758
|
|
|
) |
|
759
|
|
|
|
|
760
|
|
|
# the service tag must be always pushed |
|
761
|
1 |
|
new_action = {"action_type": "set_vlan", "vlan_id": out_vlan} |
|
762
|
1 |
|
flow_mod["actions"].insert(0, new_action) |
|
763
|
|
|
|
|
764
|
1 |
|
new_action = {"action_type": "push_vlan", "tag_type": "s"} |
|
765
|
1 |
|
flow_mod["actions"].insert(0, new_action) |
|
766
|
|
|
|
|
767
|
1 |
|
if in_vlan: |
|
768
|
|
|
# if in_vlan is set, it must be included in the match |
|
769
|
1 |
|
flow_mod["match"]["dl_vlan"] = in_vlan |
|
770
|
1 |
|
new_action = {"action_type": "pop_vlan"} |
|
771
|
1 |
|
flow_mod["actions"].insert(0, new_action) |
|
772
|
1 |
|
return flow_mod |
|
773
|
|
|
|
|
774
|
1 |
View Code Duplication |
def _prepare_pop_flow( |
|
|
|
|
|
|
775
|
|
|
self, in_interface, out_interface, in_vlan, out_vlan, queue_id=None |
|
776
|
|
|
): |
|
777
|
|
|
# pylint: disable=too-many-arguments |
|
778
|
|
|
"""Prepare pop flow.""" |
|
779
|
1 |
|
flow_mod = self._prepare_flow_mod( |
|
780
|
|
|
in_interface, out_interface, queue_id |
|
781
|
|
|
) |
|
782
|
1 |
|
flow_mod["match"]["dl_vlan"] = out_vlan |
|
783
|
1 |
|
if in_vlan: |
|
784
|
1 |
|
new_action = {"action_type": "set_vlan", "vlan_id": in_vlan} |
|
785
|
1 |
|
flow_mod["actions"].insert(0, new_action) |
|
786
|
1 |
|
new_action = {"action_type": "push_vlan", "tag_type": "c"} |
|
787
|
1 |
|
flow_mod["actions"].insert(0, new_action) |
|
788
|
1 |
|
new_action = {"action_type": "pop_vlan"} |
|
789
|
1 |
|
flow_mod["actions"].insert(0, new_action) |
|
790
|
1 |
|
return flow_mod |
|
791
|
|
|
|
|
792
|
1 |
|
@staticmethod |
|
793
|
|
|
def run_sdntrace(uni): |
|
794
|
|
|
"""Run SDN trace on control plane starting from EVC UNIs.""" |
|
795
|
|
|
endpoint = f"{settings.SDN_TRACE_CP_URL}/trace" |
|
796
|
|
|
data_uni = { |
|
797
|
|
|
"trace": { |
|
798
|
|
|
"switch": { |
|
799
|
|
|
"dpid": uni.interface.switch.dpid, |
|
800
|
|
|
"in_port": uni.interface.port_number, |
|
801
|
|
|
} |
|
802
|
|
|
} |
|
803
|
|
|
} |
|
804
|
|
|
if uni.user_tag: |
|
805
|
|
|
data_uni["trace"]["eth"] = { |
|
806
|
|
|
"dl_type": 0x8100, |
|
807
|
|
|
"dl_vlan": uni.user_tag.value, |
|
808
|
|
|
} |
|
809
|
|
|
response = requests.put(endpoint, json=data_uni) |
|
810
|
|
|
if response.status_code >= 400: |
|
811
|
|
|
log.error(f"Failed to run sdntrace-cp: {response.text}") |
|
812
|
|
|
return [] |
|
813
|
|
|
return response.json().get('result', []) |
|
814
|
|
|
|
|
815
|
1 |
|
def check_traces(self): |
|
816
|
|
|
"""Check if current_path is deployed comparing with SDN traces.""" |
|
817
|
|
|
trace_a = self.run_sdntrace(self.uni_a) |
|
818
|
|
|
if len(trace_a) != len(self.current_path) + 1: |
|
819
|
|
|
log.warn(f"Invalid trace from uni_a: {trace_a}") |
|
820
|
|
|
return False |
|
821
|
|
|
trace_z = self.run_sdntrace(self.uni_z) |
|
822
|
|
|
if len(trace_z) != len(self.current_path) + 1: |
|
823
|
|
|
log.warn(f"Invalid trace from uni_z: {trace_z}") |
|
824
|
|
|
return False |
|
825
|
|
|
|
|
826
|
|
|
for link, trace1, trace2 in zip(self.current_path, |
|
827
|
|
|
trace_a[1:], |
|
828
|
|
|
trace_z[:0:-1]): |
|
829
|
|
|
if compare_endpoint_trace( |
|
830
|
|
|
link.endpoint_a, |
|
831
|
|
|
glom(link.metadata, 's_vlan.value'), trace2) is False: |
|
832
|
|
|
log.warn(f"Invalid trace from uni_a: {trace_a}") |
|
833
|
|
|
return False |
|
834
|
|
|
if compare_endpoint_trace( |
|
835
|
|
|
link.endpoint_b, |
|
836
|
|
|
glom(link.metadata, 's_vlan.value'), trace1) is False: |
|
837
|
|
|
log.warn(f"Invalid trace from uni_z: {trace_z}") |
|
838
|
|
|
return False |
|
839
|
|
|
|
|
840
|
|
|
return True |
|
841
|
|
|
|
|
842
|
|
|
|
|
843
|
1 |
|
class LinkProtection(EVCDeploy): |
|
844
|
|
|
"""Class to handle link protection.""" |
|
845
|
|
|
|
|
846
|
1 |
|
def is_affected_by_link(self, link=None): |
|
847
|
|
|
"""Verify if the current path is affected by link down event.""" |
|
848
|
|
|
return self.current_path.is_affected_by_link(link) |
|
849
|
|
|
|
|
850
|
1 |
|
def is_using_primary_path(self): |
|
851
|
|
|
"""Verify if the current deployed path is self.primary_path.""" |
|
852
|
1 |
|
return self.current_path == self.primary_path |
|
853
|
|
|
|
|
854
|
1 |
|
def is_using_backup_path(self): |
|
855
|
|
|
"""Verify if the current deployed path is self.backup_path.""" |
|
856
|
1 |
|
return self.current_path == self.backup_path |
|
857
|
|
|
|
|
858
|
1 |
|
def is_using_dynamic_path(self): |
|
859
|
|
|
"""Verify if the current deployed path is dynamic.""" |
|
860
|
1 |
|
if ( |
|
861
|
|
|
self.current_path |
|
862
|
|
|
and not self.is_using_primary_path() |
|
863
|
|
|
and not self.is_using_backup_path() |
|
864
|
|
|
and self.current_path.status is EntityStatus.UP |
|
865
|
|
|
): |
|
866
|
|
|
return True |
|
867
|
1 |
|
return False |
|
868
|
|
|
|
|
869
|
1 |
|
def deploy_to(self, path_name=None, path=None): |
|
870
|
|
|
"""Create a deploy to path.""" |
|
871
|
1 |
|
if self.current_path == path: |
|
872
|
1 |
|
log.debug(f"{path_name} is equal to current_path.") |
|
873
|
1 |
|
return True |
|
874
|
|
|
|
|
875
|
1 |
|
if path.status is EntityStatus.UP: |
|
876
|
1 |
|
return self.deploy_to_path(path) |
|
877
|
|
|
|
|
878
|
1 |
|
return False |
|
879
|
|
|
|
|
880
|
1 |
|
def handle_link_up(self, link): |
|
881
|
|
|
"""Handle circuit when link down. |
|
882
|
|
|
|
|
883
|
|
|
Args: |
|
884
|
|
|
link(Link): Link affected by link.down event. |
|
885
|
|
|
|
|
886
|
|
|
""" |
|
887
|
1 |
|
if self.is_using_primary_path(): |
|
888
|
1 |
|
return True |
|
889
|
|
|
|
|
890
|
1 |
|
success = False |
|
891
|
1 |
|
if self.primary_path.is_affected_by_link(link): |
|
892
|
1 |
|
success = self.deploy_to_primary_path() |
|
893
|
|
|
|
|
894
|
1 |
|
if success: |
|
895
|
1 |
|
return True |
|
896
|
|
|
|
|
897
|
|
|
# We tried to deploy(primary_path) without success. |
|
898
|
|
|
# And in this case is up by some how. Nothing to do. |
|
899
|
1 |
|
if self.is_using_backup_path() or self.is_using_dynamic_path(): |
|
900
|
|
|
return True |
|
901
|
|
|
|
|
902
|
|
|
# In this case, probably the circuit is not being used and |
|
903
|
|
|
# we can move to backup |
|
904
|
1 |
|
if self.backup_path.is_affected_by_link(link): |
|
905
|
1 |
|
success = self.deploy_to_backup_path() |
|
906
|
|
|
|
|
907
|
1 |
|
if success: |
|
908
|
1 |
|
return True |
|
909
|
|
|
|
|
910
|
|
|
# In this case, the circuit is not being used and we should |
|
911
|
|
|
# try a dynamic path |
|
912
|
|
|
if self.dynamic_backup_path: |
|
913
|
|
|
return self.deploy_to_path() |
|
914
|
|
|
|
|
915
|
|
|
return True |
|
916
|
|
|
|
|
917
|
1 |
|
def handle_link_down(self): |
|
918
|
|
|
"""Handle circuit when link down. |
|
919
|
|
|
|
|
920
|
|
|
Returns: |
|
921
|
|
|
bool: True if the re-deploy was successly otherwise False. |
|
922
|
|
|
|
|
923
|
|
|
""" |
|
924
|
1 |
|
success = False |
|
925
|
1 |
|
if self.is_using_primary_path(): |
|
926
|
1 |
|
success = self.deploy_to_backup_path() |
|
927
|
1 |
|
elif self.is_using_backup_path(): |
|
928
|
1 |
|
success = self.deploy_to_primary_path() |
|
929
|
|
|
|
|
930
|
1 |
|
if not success and self.dynamic_backup_path: |
|
931
|
1 |
|
success = self.deploy_to_path() |
|
932
|
|
|
|
|
933
|
1 |
|
if success: |
|
934
|
1 |
|
log.debug(f"{self} deployed after link down.") |
|
935
|
|
|
else: |
|
936
|
1 |
|
self.deactivate() |
|
937
|
1 |
|
self.current_path = Path([]) |
|
938
|
1 |
|
self.sync() |
|
939
|
1 |
|
log.debug(f"Failed to re-deploy {self} after link down.") |
|
940
|
|
|
|
|
941
|
1 |
|
return success |
|
942
|
|
|
|
|
943
|
|
|
|
|
944
|
1 |
|
class EVC(LinkProtection): |
|
945
|
|
|
"""Class that represents a E-Line Virtual Connection.""" |
|
946
|
|
|
|
kytos-ng /
mef_eline
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