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driver.py
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driver.py
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# Copyright 2016 Networks
import logging
import sys
from netaddr import IPAddress, IPNetwork
from flask import Flask, jsonify, request
from werkzeug.exceptions import HTTPException, default_exceptions
import linux_net
from utils import generate_mac
from utils import generate_devname
from utils import ProcessExecutionError
LOCAL_PREFIX = "tap"
REMOTE_PREFIX = "ns"
BRIDGE = "daolinet"
# From http://flask.pocoo.org/snippets/83/
def make_json_app(import_name, **kwargs):
"""
Creates a JSON-oriented Flask app.
All error responses that you don't specifically
manage yourself will have application/json content
type, and will contain JSON like this (just an example):
{ "message": "405: Method Not Allowed" }
"""
def make_json_error(ex):
response = jsonify({"Err": str(ex)})
response.status_code = (ex.code
if isinstance(ex, HTTPException)
else 500)
return response
app = Flask(__name__, **kwargs)
for code in default_exceptions.iterkeys():
app.error_handler_spec[None][code] = make_json_error
return app
app = make_json_app(__name__)
app.logger.addHandler(logging.StreamHandler(sys.stdout))
app.logger.setLevel(logging.DEBUG)
app.logger.info("Daolinet plugin started")
@app.route('/Plugin.Activate', methods=['POST'])
def activate():
data = {"Implements": ["NetworkDriver"]}
app.logger.debug("Activate data %s", data)
return jsonify(data)
# libnetwork plugin API
@app.route('/NetworkDriver.GetCapabilities', methods=['POST'])
def get_capabilities():
response = {"Scope": "global"}
app.logger.debug("Get Capabilities %s", response)
return jsonify(response)
@app.route('/NetworkDriver.CreateNetwork', methods=['POST'])
def create_network():
data = request.get_json(force=True)
app.logger.debug("Create network %s", data)
network_id = data["NetworkID"]
dev = generate_devname(LOCAL_PREFIX, network_id)
ipv4 = data['IPv4Data']
if len(ipv4) != 1:
msg = "IPv4Data support only one subnetwork"
app.logger.error(msg)
raise Exception(msg)
gateway = ipv4[0].get('Gateway')
if not gateway:
msg = "No available Gateway"
app.logger.error(msg)
raise Exception(msg)
app.logger.debug("Create Network data %s", "{}")
return jsonify({})
@app.route('/NetworkDriver.DeleteNetwork', methods=['POST'])
def delete_network():
data = request.get_json(force=True)
app.logger.debug("Delete network %s", data)
return jsonify({})
@app.route('/NetworkDriver.CreateEndpoint', methods=['POST'])
def create_endpoint():
data = request.get_json(force=True)
app.logger.debug("Create Endpoint %s", data)
endpoint_id = data["EndpointID"]
network_id = data["NetworkID"]
interface = data["Interface"]
macaddr = generate_mac()
if_local = generate_devname(LOCAL_PREFIX, endpoint_id)
if_remote = generate_devname(REMOTE_PREFIX, endpoint_id)
# Create the veth pair
linux_net.plugin(if_local, if_remote)
try:
linux_net.set_mac(if_remote, macaddr)
except ProcessExecutionError as e:
linux_net.delete_net_dev(if_remote)
raise e
response = {
"Interface": {
"MacAddress": macaddr,
}
}
return jsonify(response)
@app.route('/NetworkDriver.EndpointOperInfo', methods=['POST'])
def endpoint_operinfo():
data = request.get_json(force=True)
app.logger.debug("Endpoint OperInfo %s", data)
endpoint_id = data["EndpointID"]
response = {
"Value": {}
}
return jsonify(response)
@app.route('/NetworkDriver.DeleteEndpoint', methods=['POST'])
def delete_endpoint():
data = request.get_json(force=True)
app.logger.debug("Delete Endpoint %s", data)
endpoint_id = data["EndpointID"]
return jsonify({})
@app.route('/NetworkDriver.Join', methods=['POST'])
def join():
data = request.get_json(force=True)
app.logger.debug("Join Endpoint %s", data)
network_id = data["NetworkID"]
endpoint_id = data["EndpointID"]
if_local = generate_devname(LOCAL_PREFIX, endpoint_id)
if_remote = generate_devname(REMOTE_PREFIX, endpoint_id)
try:
# Add dev to ovs
linux_net.create_ovs_port(BRIDGE, if_local)
except ProcessExecutionError as e:
linux_net.delete_net_dev(if_remote)
raise e
response = {
"InterfaceName": {
"SrcName": if_remote,
"DstPrefix": "eth",
},
"Gateway": linux_net.gateway_get(network_id),
}
return jsonify(response)
@app.route('/NetworkDriver.Leave', methods=['POST'])
def leave():
data = request.get_json(force=True)
app.logger.debug("Leave %s", data)
endpoint_id = data["EndpointID"]
dev = generate_devname(LOCAL_PREFIX, endpoint_id)
linux_net.delete_ovs_port(BRIDGE, dev)
linux_net.delete_net_dev(dev)
return jsonify({})
@app.route('/NetworkDriver.DiscoverNew', methods=['POST'])
def discover_new():
data = request.get_json(force=True)
app.logger.debug("Discover New %s", data)
return jsonify({})
@app.route('/NetworkDriver.DiscoverDelete', methods=['POST'])
def discover_delete():
data = request.get_json(force=True)
app.logger.debug("Discover Delete %s", data)
return jsonify({})