gns3-server/gns3server/controller/node.py

476 lines
14 KiB
Python

#!/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 <http://www.gnu.org/licenses/>.
import aiohttp
import asyncio
import copy
import uuid
import os
from .compute import ComputeConflict
from ..utils.images import images_directories
from ..utils.qt import qt_font_to_style
import logging
log = logging.getLogger(__name__)
class Node:
# This properties are used only on controller and are not forwarded to the compute
CONTROLLER_ONLY_PROPERTIES = ["x", "y", "z", "width", "height", "symbol", "label", "console_host"]
def __init__(self, project, compute, name, node_id=None, node_type=None, **kwargs):
"""
:param project: Project of the node
:param compute: Compute server where the server will run
:param name: Node name
:param node_id: UUID of the node (integer)
:param node_type: Type of emulator
:param kwargs: Node properties
"""
assert node_type
if node_id is None:
self._id = str(uuid.uuid4())
else:
self._id = node_id
self._project = project
self._compute = compute
self._node_type = node_type
self._label = None
self._name = None
self.name = name
self._console = None
self._console_type = None
self._properties = {}
self._command_line = None
self._node_directory = None
self._status = "stopped"
self._x = 0
self._y = 0
self._z = 0
self._symbol = None
# Update node properties with additional elements
# This properties will be recompute
ignore_properties = ("width", "height")
for prop in kwargs:
if prop not in ignore_properties:
try:
setattr(self, prop, kwargs[prop])
except AttributeError as e:
log.critical("Can't set attribute %s", prop)
raise e
if self._symbol is None:
self.symbol = ":/symbols/computer.svg"
@property
def id(self):
return self._id
@property
def status(self):
return self._status
@property
def name(self):
return self._name
@name.setter
def name(self, new_name):
self._name = self._project.update_node_name(self, new_name)
# The text in label need to be always the node name
if self.label and self._label["text"] != self._name:
self._label["text"] = self._name
self._label["x"] = None # Center text
@property
def node_type(self):
return self._node_type
@property
def console(self):
return self._console
@console.setter
def console(self, val):
self._console = val
@property
def console_type(self):
return self._console_type
@console_type.setter
def console_type(self, val):
self._console_type = val
@property
def properties(self):
return self._properties
@properties.setter
def properties(self, val):
self._properties = val
@property
def project(self):
return self._project
@property
def compute(self):
return self._compute
@property
def host(self):
"""
:returns: Domain or ip for console connection
"""
return self._compute.host
@property
def x(self):
return self._x
@x.setter
def x(self, val):
self._x = val
@property
def y(self):
return self._y
@y.setter
def y(self, val):
self._y = val
@property
def z(self):
return self._z
@z.setter
def z(self, val):
self._z = val
@property
def width(self):
return self._width
@property
def height(self):
return self._height
@property
def symbol(self):
return self._symbol
@symbol.setter
def symbol(self, val):
self._symbol = val
try:
self._width, self._height, filetype = self._project.controller.symbols.get_size(val)
# If symbol is invalid we replace it by default
except (ValueError, OSError):
self.symbol = ":/symbols/computer.svg"
if self._label is None:
# Apply to label user style or default
try:
style = qt_font_to_style(
self._project.controller.settings["GraphicsView"]["default_label_font"],
self._project.controller.settings["GraphicsView"]["default_label_color"])
except KeyError:
style = "font-size: 10;font-familly: Verdana"
self._label = {
"y": round(self._height / 2 + 10) * -1,
"text": self._name,
"style": style,
"x": None, # None: mean the client should center it
"rotation": 0
}
@property
def label(self):
return self._label
@label.setter
def label(self, val):
# The text in label need to be always the node name
val["text"] = self._name
self._label = val
@asyncio.coroutine
def create(self):
"""
Create the node on the compute server
"""
data = self._node_data()
data["node_id"] = self._id
trial = 0
while trial != 6:
try:
response = yield from self._compute.post("/projects/{}/{}/nodes".format(self._project.id, self._node_type), data=data)
except ComputeConflict as e:
if e.response.get("exception") == "ImageMissingError":
res = yield from self._upload_missing_image(self._node_type, e.response["image"])
if not res:
raise e
else:
raise e
else:
self.parse_node_response(response.json)
return True
trial += 1
@asyncio.coroutine
def update(self, **kwargs):
"""
Update the node on the compute server
:param kwargs: Node properties
"""
# When updating properties used only on controller we don't need to call the compute
update_compute = False
old_json = self.__json__()
compute_properties = None
# Update node properties with additional elements
for prop in kwargs:
if getattr(self, prop) != kwargs[prop]:
if prop not in self.CONTROLLER_ONLY_PROPERTIES:
update_compute = True
# We update properties on the compute and wait for the anwser from the compute node
if prop == "properties":
compute_properties = kwargs[prop]
else:
setattr(self, prop, kwargs[prop])
# We send notif only if object has changed
if old_json != self.__json__():
self.project.controller.notification.emit("node.updated", self.__json__())
if update_compute:
data = self._node_data(properties=compute_properties)
response = yield from self.put(None, data=data)
self.parse_node_response(response.json)
self.project.dump()
def parse_node_response(self, response):
"""
Update the object with the remote node object
"""
for key, value in response.items():
if key == "console":
self._console = value
elif key == "node_directory":
self._node_directory = value
elif key == "command_line":
self._command_line = value
elif key == "status":
self._status = value
elif key == "console_type":
self._console_type = value
elif key == "name":
self.name = value
elif key in ["node_id", "project_id", "console_host"]:
pass
else:
self._properties[key] = value
def _node_data(self, properties=None):
"""
Prepare node data to send to the remote controller
:param properties: If properties is None use actual property otherwise use the parameter
"""
if properties:
data = copy.copy(properties)
else:
data = copy.copy(self._properties)
data["name"] = self._name
if self._console:
# console is optional for builtin nodes
data["console"] = self._console
if self._console_type:
data["console_type"] = self._console_type
# None properties are not be send. Because it can mean the emulator doesn't support it
for key in list(data.keys()):
if data[key] is None or data[key] is {} or key in self.CONTROLLER_ONLY_PROPERTIES:
del data[key]
return data
@asyncio.coroutine
def destroy(self):
yield from self.delete()
@asyncio.coroutine
def start(self):
"""
Start a node
"""
yield from self.post("/start")
@asyncio.coroutine
def stop(self):
"""
Stop a node
"""
try:
yield from self.post("/stop")
# We don't care if a compute is down at this step
except aiohttp.errors.ClientOSError:
pass
@asyncio.coroutine
def suspend(self):
"""
Suspend a node
"""
yield from self.post("/suspend")
@asyncio.coroutine
def reload(self):
"""
Suspend a node
"""
yield from self.post("/reload")
@asyncio.coroutine
def post(self, path, data=None):
"""
HTTP post on the node
"""
if data:
return (yield from self._compute.post("/projects/{}/{}/nodes/{}{}".format(self._project.id, self._node_type, self._id, path), data=data))
else:
return (yield from self._compute.post("/projects/{}/{}/nodes/{}{}".format(self._project.id, self._node_type, self._id, path)))
@asyncio.coroutine
def put(self, path, data=None):
"""
HTTP post on the node
"""
if path is None:
path = "/projects/{}/{}/nodes/{}".format(self._project.id, self._node_type, self._id)
else:
path = "/projects/{}/{}/nodes/{}{}".format(self._project.id, self._node_type, self._id, path)
if data:
return (yield from self._compute.put(path, data=data))
else:
return (yield from self._compute.put(path))
@asyncio.coroutine
def delete(self, path=None):
"""
HTTP post on the node
"""
if path is None:
return (yield from self._compute.delete("/projects/{}/{}/nodes/{}".format(self._project.id, self._node_type, self._id)))
else:
return (yield from self._compute.delete("/projects/{}/{}/nodes/{}{}".format(self._project.id, self._node_type, self._id, path)))
@asyncio.coroutine
def _upload_missing_image(self, type, img):
"""
Search an image on local computer and upload it to remote compute
if the image exists
"""
for directory in images_directories(type):
image = os.path.join(directory, img)
if os.path.exists(image):
self.project.controller.notification.emit("log.info", {"message": "Uploading missing image {}".format(img)})
with open(image, 'rb') as f:
yield from self._compute.post("/{}/images/{}".format(self._node_type, os.path.basename(img)), data=f, timeout=None)
self.project.controller.notification.emit("log.info", {"message": "Upload finished for {}".format(img)})
return True
return False
@asyncio.coroutine
def dynamips_auto_idlepc(self):
"""
Compute the idle PC for a dynamips node
"""
return (yield from self._compute.get("/projects/{}/{}/nodes/{}/auto_idlepc".format(self._project.id, self._node_type, self._id), timeout=240)).json
@asyncio.coroutine
def dynamips_idlepc_proposals(self):
"""
Compute a list of potential idle PC
"""
return (yield from self._compute.get("/projects/{}/{}/nodes/{}/idlepc_proposals".format(self._project.id, self._node_type, self._id), timeout=240)).json
def __repr__(self):
return "<gns3server.controller.Node {} {}>".format(self._node_type, self._name)
def __eq__(self, other):
if not isinstance(other, Node):
return False
return self.id == other.id and other.project.id == self.project.id
def __json__(self, topology_dump=False):
"""
:param topology_dump: Filter to keep only properties require for saving on disk
"""
if topology_dump:
return {
"compute_id": str(self._compute.id),
"node_id": self._id,
"node_type": self._node_type,
"name": self._name,
"console": self._console,
"console_type": self._console_type,
"properties": self._properties,
"label": self._label,
"x": self._x,
"y": self._y,
"z": self._z,
"width": self._width,
"height": self._height,
"symbol": self._symbol
}
return {
"compute_id": str(self._compute.id),
"project_id": self._project.id,
"node_id": self._id,
"node_type": self._node_type,
"node_directory": self._node_directory,
"name": self._name,
"console": self._console,
"console_host": str(self._compute.host),
"console_type": self._console_type,
"command_line": self._command_line,
"properties": self._properties,
"status": self._status,
"label": self._label,
"x": self._x,
"y": self._y,
"z": self._z,
"width": self._width,
"height": self._height,
"symbol": self._symbol
}