mirror of https://github.com/EdgeVPNio/evio.git
134 lines
5.3 KiB
Python
134 lines
5.3 KiB
Python
# EdgeVPNio
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# Copyright 2020, University of Florida
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to deal
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# in the Software without restriction, including without limitation the rights
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in
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# all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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# THE SOFTWARE.
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try:
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import simplejson as json
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except ImportError:
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import json
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import threading
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import time
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import zlib
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from collections import defaultdict
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from datetime import datetime
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import requests
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from broker.controller_module import ControllerModule
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class OverlayVisualizer(ControllerModule):
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def __init__(self, nexus, module_config):
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super().__init__(nexus, module_config)
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self._vis_ds_lock = threading.Lock()
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self._vis_req_publisher = None
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# Visualizer webservice URL
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self._vis_address = "http://" + self.config["WebServiceAddress"]
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self._req_url = "{}/EVIO/nodes/{}".format(self._vis_address, self.node_id)
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self._vis_ds: dict
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self._boot_time = str(datetime.fromtimestamp(time.time()))
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def initialize(self):
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# We're using the pub-sub model here to gather data for the visualizer
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# from other modules
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# Using this publisher, the OverlayVisualizer publishes events in the
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# timer_method() and all subscribing modules are expected to reply
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# with the data they want to forward to the visualiser
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self._vis_ds = self.init_viz_data()
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self._vis_req_publisher = self.publish_subscription("VIS_DATA_REQ")
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self.logger.info("Controller module loaded")
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self.post_viz_data(self.init_viz_data())
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def init_viz_data(self, boot_time=None):
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ds = dict(NodeId=self.node_id, VizData=defaultdict(dict))
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ds["BootTime"] = self._boot_time
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ds["Version"] = self.version
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for olid in self.registered_overlay_ids:
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ds["VizData"][olid] = defaultdict(dict, Tunnels=defaultdict(dict))
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if "NodeName" in self.config:
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ds["NodeName"] = self.config["NodeName"]
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if "GeoCoordinate" in self.config:
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ds["GeoCoordinate"] = self.config["GeoCoordinate"]
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return ds
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def process_cbt(self, cbt):
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if cbt.is_expired:
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self.abort_handler(cbt)
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elif cbt.is_pending:
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if cbt.request.action == "VIS_DATA_REQ":
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msg = cbt.response.data
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if cbt.response.status and msg:
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with self._vis_ds_lock:
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for mod_name in msg:
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for olid in msg[mod_name]:
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self._vis_ds["VizData"][olid][mod_name] = msg[mod_name][
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olid
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]
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self.free_cbt(cbt)
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else:
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self.req_handler_default(cbt)
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elif cbt.is_completed:
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self.req_handler_default(cbt)
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def post_viz_data(self, viz_data):
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try:
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viz_data = json.dumps(viz_data).encode("utf-8")
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self.logger.debug("Posting viz data: %s", viz_data)
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resp = requests.put(
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self._req_url,
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data=zlib.compress(viz_data),
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headers={
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"Content-Type": "application/json",
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"Content-Encoding": "deflate",
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},
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)
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resp.raise_for_status()
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except requests.exceptions.RequestException as err:
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self.logger.warning("Failed to send viz data to %s. %s", self._req_url, err)
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def build_tunnel_data(self, ds):
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for olid in ds["VizData"]:
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if "Topology" in ds["VizData"][olid]:
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for tnlid in ds["VizData"][olid]["Topology"]:
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ds["VizData"][olid]["Tunnels"][tnlid] = ds["VizData"][olid][
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"Topology"
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][tnlid]
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if "LinkManager" in ds["VizData"][olid]:
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for tnlid in ds["VizData"][olid]["LinkManager"]:
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ds["VizData"][olid]["Tunnels"][tnlid].update(
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ds["VizData"][olid]["LinkManager"][tnlid]
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)
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ds["VizData"][olid].pop("LinkManager", None)
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ds["VizData"][olid].pop("Topology", None)
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return ds
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def on_timer_event(self):
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viz_ds = None
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with self._vis_ds_lock:
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viz_ds = self._vis_ds
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self._vis_ds = self.init_viz_data()
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msg = self.build_tunnel_data(viz_ds)
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self.post_viz_data(msg)
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self._vis_req_publisher.post_update(None)
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def terminate(self):
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self.logger.info("Controller module terminated")
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