#!/usr/bin/env python # # Copyright (C) 2016 GNS3 Technologies Inc. # # This program is free software: you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation, either version 3 of the License, or # (at your option) any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program. If not, see . import os import sys import json import uuid import socket import shutil import aiohttp from ..config import Config from .project import Project from .template import Template from .appliance import Appliance from .appliance_manager import ApplianceManager from .template_manager import TemplateManager from .compute import Compute, ComputeError from .notification import Notification from .symbols import Symbols from ..version import __version__ from .topology import load_topology from .gns3vm import GNS3VM from ..utils.get_resource import get_resource from .gns3vm.gns3_vm_error import GNS3VMError import logging log = logging.getLogger(__name__) class Controller: """ The controller is responsible to manage one or more computes. """ def __init__(self): self._computes = {} self._projects = {} self._notification = Notification(self) self.gns3vm = GNS3VM(self) self.symbols = Symbols() self._appliance_manager = ApplianceManager() self._template_manager = TemplateManager() self._iou_license_settings = {"iourc_content": "", "license_check": True} self._config_loaded = False self._config_file = Config.instance().controller_config log.info("Load controller configuration file {}".format(self._config_file)) async def start(self): log.info("Controller is starting") self.load_base_files() server_config = Config.instance().get_section_config("Server") Config.instance().listen_for_config_changes(self._update_config) host = server_config.get("host", "localhost") port = server_config.getint("port", 3080) # clients will use the IP they use to connect to # the controller if console_host is 0.0.0.0 console_host = host if host == "0.0.0.0": host = "127.0.0.1" name = socket.gethostname() if name == "gns3vm": name = "Main server" computes = self._load_controller_settings() try: self._local_server = await self.add_compute(compute_id="local", name=name, protocol=server_config.get("protocol", "http"), host=host, console_host=console_host, port=port, user=server_config.get("user", ""), password=server_config.get("password", ""), force=True) except aiohttp.web.HTTPConflict: log.fatal("Cannot access to the local server, make sure something else is not running on the TCP port {}".format(port)) sys.exit(1) for c in computes: try: await self.add_compute(**c) except (aiohttp.web.HTTPError, KeyError): pass # Skip not available servers at loading try: await self.gns3vm.auto_start_vm() except GNS3VMError as e: log.warning(str(e)) await self.load_projects() await self._project_auto_open() def _update_config(self): """ Call this when the server configuration file changes. """ if self._local_server: server_config = Config.instance().get_section_config("Server") self._local_server.user = server_config.get("user") self._local_server.password = server_config.get("password") async def stop(self): log.info("Controller is stopping") for project in self._projects.values(): await project.close() for compute in self._computes.values(): try: await compute.close() # We don't care if a compute is down at this step except (ComputeError, aiohttp.web.HTTPError, OSError): pass await self.gns3vm.exit_vm() #self.save() self._computes = {} self._projects = {} async def reload(self): log.info("Controller is reloading") self._load_controller_settings() await self.load_projects() def check_can_write_config(self): """ Check if the controller configuration can be written on disk :returns: boolean """ try: os.makedirs(os.path.dirname(self._config_file), exist_ok=True) if not os.access(self._config_file, os.W_OK): raise aiohttp.web.HTTPConflict(text="Change rejected, cannot write to controller configuration file '{}'".format(self._config_file)) except OSError as e: raise aiohttp.web.HTTPConflict(text="Change rejected: {}".format(e)) def save(self): """ Save the controller configuration on disk """ if self._config_loaded is False: return controller_settings = {"computes": [], "templates": [], "gns3vm": self.gns3vm.__json__(), "iou_license": self._iou_license_settings, "appliances_etag": self._appliance_manager.appliances_etag, "version": __version__} for template in self._template_manager.templates.values(): if not template.builtin: controller_settings["templates"].append(template.__json__()) for compute in self._computes.values(): if compute.id != "local" and compute.id != "vm": controller_settings["computes"].append({"host": compute.host, "name": compute.name, "port": compute.port, "protocol": compute.protocol, "user": compute.user, "password": compute.password, "compute_id": compute.id}) try: os.makedirs(os.path.dirname(self._config_file), exist_ok=True) with open(self._config_file, 'w+') as f: json.dump(controller_settings, f, indent=4) except OSError as e: log.error("Cannot write controller configuration file '{}': {}".format(self._config_file, e)) def _load_controller_settings(self): """ Reload the controller configuration from disk """ try: if not os.path.exists(self._config_file): self._config_loaded = True self.save() with open(self._config_file) as f: controller_settings = json.load(f) except (OSError, ValueError) as e: log.critical("Cannot load configuration file '{}': {}".format(self._config_file, e)) return [] # load GNS3 VM settings if "gns3vm" in controller_settings: gns3_vm_settings = controller_settings["gns3vm"] if "port" not in gns3_vm_settings: # port setting was added in version 2.2.8 # the default port was 3080 before this gns3_vm_settings["port"] = 3080 self.gns3vm.settings = gns3_vm_settings # load the IOU license settings if "iou_license" in controller_settings: self._iou_license_settings = controller_settings["iou_license"] self._appliance_manager.appliances_etag = controller_settings.get("appliances_etag") self._appliance_manager.load_appliances() self._template_manager.load_templates(controller_settings.get("templates")) self._config_loaded = True return controller_settings.get("computes", []) async def load_projects(self): """ Preload the list of projects from disk """ server_config = Config.instance().get_section_config("Server") projects_path = os.path.expanduser(server_config.get("projects_path", "~/GNS3/projects")) os.makedirs(projects_path, exist_ok=True) try: for project_path in os.listdir(projects_path): project_dir = os.path.join(projects_path, project_path) if os.path.isdir(project_dir): for file in os.listdir(project_dir): if file.endswith(".gns3"): try: await self.load_project(os.path.join(project_dir, file), load=False) except (aiohttp.web.HTTPConflict, aiohttp.web.HTTPNotFound, NotImplementedError): pass # Skip not compatible projects except OSError as e: log.error(str(e)) def load_base_files(self): """ At startup we copy base file to the user location to allow them to customize it """ dst_path = self.configs_path() src_path = get_resource('configs') try: for file in os.listdir(src_path): if not os.path.exists(os.path.join(dst_path, file)): shutil.copy(os.path.join(src_path, file), os.path.join(dst_path, file)) except OSError: pass def images_path(self): """ Get the image storage directory """ server_config = Config.instance().get_section_config("Server") images_path = os.path.expanduser(server_config.get("images_path", "~/GNS3/projects")) os.makedirs(images_path, exist_ok=True) return images_path def configs_path(self): """ Get the configs storage directory """ server_config = Config.instance().get_section_config("Server") images_path = os.path.expanduser(server_config.get("configs_path", "~/GNS3/projects")) os.makedirs(images_path, exist_ok=True) return images_path async def add_compute(self, compute_id=None, name=None, force=False, connect=True, **kwargs): """ Add a server to the dictionary of computes controlled by this controller :param compute_id: Compute identifier :param name: Compute name :param force: True skip security check :param connect: True connect to the compute immediately :param kwargs: See the documentation of Compute """ if compute_id not in self._computes: # We disallow to create from the outside the local and VM server if (compute_id == 'local' or compute_id == 'vm') and not force: return None # It seem we have error with a gns3vm imported as a remote server and conflict # with GNS3 VM settings. That's why we ignore server name gns3vm if name == 'gns3vm': return None for compute in self._computes.values(): if name and compute.name == name and not force: raise aiohttp.web.HTTPConflict(text='Compute name "{}" already exists'.format(name)) compute = Compute(compute_id=compute_id, controller=self, name=name, **kwargs) self._computes[compute.id] = compute self.save() if connect: await compute.connect() self.notification.controller_emit("compute.created", compute.__json__()) return compute else: if connect: await self._computes[compute_id].connect() self.notification.controller_emit("compute.updated", self._computes[compute_id].__json__()) return self._computes[compute_id] async def close_compute_projects(self, compute): """ Close projects running on a compute """ for project in self._projects.values(): if compute in project.computes: await project.close() def compute_has_open_project(self, compute): """ Check is compute has a project opened. :returns: True if a project is open """ for project in self._projects.values(): if compute in project.computes and project.status == "opened": return True return False async def delete_compute(self, compute_id): """ Delete a compute node. Project using this compute will be close :param compute_id: Compute identifier """ try: compute = self.get_compute(compute_id) except aiohttp.web.HTTPNotFound: return await self.close_compute_projects(compute) await compute.close() del self._computes[compute_id] self.save() self.notification.controller_emit("compute.deleted", compute.__json__()) @property def notification(self): """ The notification system """ return self._notification @property def computes(self): """ :returns: The dictionary of computes managed by this controller """ return self._computes def get_compute(self, compute_id): """ Returns a compute or raise a 404 error. """ try: return self._computes[compute_id] except KeyError: if compute_id == "vm": raise aiohttp.web.HTTPNotFound(text="Cannot use a node on the GNS3 VM server with the GNS3 VM not configured") raise aiohttp.web.HTTPNotFound(text="Compute ID {} doesn't exist".format(compute_id)) def has_compute(self, compute_id): """ Return True if the compute exist in the controller """ return compute_id in self._computes async def add_project(self, project_id=None, name=None, path=None, **kwargs): """ Creates a project or returns an existing project :param project_id: Project ID :param name: Project name :param kwargs: See the documentation of Project """ if project_id not in self._projects: for project in self._projects.values(): if name and project.name == name: if path and path == project.path: raise aiohttp.web.HTTPConflict(text='Project "{}" already exists in location "{}"'.format(name, path)) else: raise aiohttp.web.HTTPConflict(text='Project "{}" already exists'.format(name)) project = Project(project_id=project_id, controller=self, name=name, path=path, **kwargs) self._projects[project.id] = project return self._projects[project.id] return self._projects[project_id] def get_project(self, project_id): """ Returns a project or raise a 404 error. """ try: return self._projects[project_id] except KeyError: raise aiohttp.web.HTTPNotFound(text="Project ID {} doesn't exist".format(project_id)) async def get_loaded_project(self, project_id): """ Returns a project or raise a 404 error. If project is not finished to load wait for it """ project = self.get_project(project_id) await project.wait_loaded() return project def remove_project(self, project): if project.id in self._projects: del self._projects[project.id] async def load_project(self, path, load=True): """ Load a project from a .gns3 :param path: Path of the .gns3 :param load: Load the topology """ topo_data = load_topology(path) topo_data.pop("topology") topo_data.pop("version") topo_data.pop("revision") topo_data.pop("type") if topo_data["project_id"] in self._projects: project = self._projects[topo_data["project_id"]] else: project = await self.add_project(path=os.path.dirname(path), status="closed", filename=os.path.basename(path), **topo_data) if load or project.auto_open: await project.open() return project async def _project_auto_open(self): """ Auto open the project with auto open enable """ for project in self._projects.values(): if project.auto_open: await project.open() def get_free_project_name(self, base_name): """ Generate a free project name base on the base name """ names = [p.name for p in self._projects.values()] if base_name not in names: return base_name i = 1 projects_path = self.projects_directory() while True: new_name = "{}-{}".format(base_name, i) if new_name not in names and not os.path.exists(os.path.join(projects_path, new_name)): break i += 1 if i > 1000000: raise aiohttp.web.HTTPConflict(text="A project name could not be allocated (node limit reached?)") return new_name @property def projects(self): """ :returns: The dictionary of projects managed by the controller """ return self._projects @property def appliance_manager(self): """ :returns: Appliance Manager instance """ return self._appliance_manager @property def template_manager(self): """ :returns: Template Manager instance """ return self._template_manager @property def iou_license(self): """ :returns: The dictionary of IOU license settings """ return self._iou_license_settings def projects_directory(self): server_config = Config.instance().get_section_config("Server") return os.path.expanduser(server_config.get("projects_path", "~/GNS3/projects")) @staticmethod def instance(): """ Singleton to return only on instance of Controller. :returns: instance of Controller """ if not hasattr(Controller, '_instance') or Controller._instance is None: Controller._instance = Controller() return Controller._instance async def autoidlepc(self, compute_id, platform, image, ram): """ Compute and IDLE PC value for an image :param compute_id: ID of the compute where the idlepc operation need to run :param platform: Platform type :param image: Image to use :param ram: amount of RAM to use """ compute = self.get_compute(compute_id) for project in list(self._projects.values()): if project.name == "AUTOIDLEPC": await project.delete() self.remove_project(project) project = await self.add_project(name="AUTOIDLEPC") node = await project.add_node(compute, "AUTOIDLEPC", str(uuid.uuid4()), node_type="dynamips", platform=platform, image=image, ram=ram) res = await node.dynamips_auto_idlepc() await project.delete() self.remove_project(project) return res async def compute_ports(self, compute_id): """ Get the ports used by a compute. :param compute_id: ID of the compute """ compute = self.get_compute(compute_id) response = await compute.get("/network/ports") return response.json