#!/usr/bin/env python
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import json
import sys
import base64
import ConfigParser
import logging
import argparse
from distutils.util import strtobool
from kafka import KafkaConsumer
from normalizer import Normalizer
from normalizer import CollectdValue
try:
# For Python 3.0 and later
import urllib.request as url
except ImportError:
# Fall back to Python 2's urllib2
import urllib2 as url
class VESApp(Normalizer):
"""VES Application"""
def __init__(self):
"""Application initialization"""
self._app_config = {
'Domain': '127.0.0.1',
'Port': 30000,
'Path': '',
'Username': '',
'Password': '',
'Topic': '',
'UseHttps': False,
'SendEventInterval': 20.0,
'ApiVersion': 5.1,
'KafkaPort': 9092,
'KafkaBroker': 'localhost'
}
def send_data(self, event):
"""Send event to VES"""
server_url = "http{}://{}:{}{}/eventListener/v{}{}".format(
's' if self._app_config['UseHttps'] else '',
self._app_config['Domain'], int(self._app_config['Port']),
'{}'.format('/{}'.format(self._app_config['Path']) if len(
self._app_config['Path']) > 0 else ''),
int(self._app_config['ApiVersion']), '{}'.format(
'/{}'.format(self._app_config['Topic']) if len(
self._app_config['Topic']) > 0 else ''))
logging.info('Vendor Event Listener is at: {}'.format(server_url))
credentials = base64.b64encode('{}:{}'.format(
self._app_config['Username'],
self._app_config['Password']).encode()).decode()
logging.info('Authentication credentials are: {}'.format(credentials))
try:
request = url.Request(server_url)
request.add_header('Authorization', 'Basic {}'.format(credentials))
request.add_header('Content-Type', 'application/json')
event_str = json.dumps(event).encode()
logging.debug("Sending {} to {}".format(event_str, server_url))
url.urlopen(request, event_str, timeout=1)
logging.debug("Sent data to {} successfully".format(server_url))
except url.HTTPError as e:
logging.error('Vendor Event Listener exception: {}'.format(e))
except url.URLError as e:
logging.error(
'Vendor Event Listener is is not reachable: {}'.format(e))
except Exception as e:
logging.error('Vendor Event Listener error: {}'.format(e))
def config(self, config):
"""VES option configuration"""
for key, value in config.items('config'):
if key in self._app_config:
try:
if type(self._app_config[key]) == int:
value = int(value)
elif type(self._app_config[key]) == float:
value = float(value)
elif type(self._app_config[key]) == bool:
value = bool(strtobool(value))
if isinstance(value, type(self._app_config[key])):
self._app_config[key] = value
else:
logging.error("Type mismatch with %s" % key)
sys.exit()
except ValueError:
logging.error("Incorrect value type for %s" % key)
sys.exit()
else:
logging.error("Incorrect key configuration %s" % key)
sys.exit()
def init(self, configfile, schema_file):
if configfile is not None:
# read VES configuration file if provided
config = ConfigParser.ConfigParser()
config.optionxform = lambda option: option
config.read(configfile)
self.config(config)
# initialize normalizer
self.initialize(schema_file, self._app_config['SendEventInterval'])
def run(self):
"""Consumer JSON data from kafka broker"""
kafka_server = '{}:{}'.format(
self._app_config.get('KafkaBroker'),
self._app_config.get('KafkaPort'))
consumer = KafkaConsumer(
'collectd', bootstrap_servers=kafka_server,
auto_offset_reset='latest', enable_auto_commit=False,
value_deserializer=lambda m: json.loads(m.decode('ascii')))
for message in consumer:
for kafka_data in message.value:
# {
# u'dstypes': [u'derive'],
# u'plugin': u'cpu',
# u'dsnames': [u'value'],
# u'interval': 10.0,
# u'host': u'localhost',
# u'values': [99.9978996416267],
# u'time': 1502114956.244,
# u'plugin_instance': u'44',
# u'type_instance': u'idle',
# u'type': u'cpu'
# }
logging.debug('{}:run():data={}'.format(
self.__class__.__name__, kafka_data))
for ds_name in kafka_data['dsnames']:
index = kafka_data['dsnames'].index(ds_name)
val_hash = CollectdValue.hash_gen(
kafka_data['host'], kafka_data['plugin'],
kafka_data['plugin_instance'], kafka_data['type'],
kafka_data['type_instance'], ds_name)
collector = self.get_collector()
val = collector.get(val_hash)
if val:
# update the value
val.value = kafka_data['values'][index]
val.time = kafka_data['time']
del(val)
else:
# add new value into the collector
val = CollectdValue()
val.host = kafka_data['host']
val.plugin = kafka_data['plugin']
val.plugin_instance = kafka_data['plugin_instance']
val.type = kafka_data['type']
val.type_instance = kafka_data['type_instance']
val.value = kafka_data['values'][index]
val.interval = kafka_data['interval']
val.time = kafka_data['time']
val.ds_name = ds_name
collector.add(val)
def main():
# Parsing cmdline options
parser = argparse.ArgumentParser()
parser.add_argument("--events-schema", dest="schema", required=True,
help="YAML events schema definition", metavar="FILE")
parser.add_argument("--config", dest="configfile", default=None,
help="Specify config file", metavar="FILE")
parser.add_argument("--loglevel", dest="level", default='INFO',
choices=['DEBUG', 'INFO', 'WARNING', 'ERROR'],
help="Specify log level (default: %(default)s)",
metavar="LEVEL")
parser.add_argument("--logfile", dest="logfile", default='ves_app.log',
help="Specify log file (default: %(default)s)",
metavar="FILE")
args = parser.parse_args()
# Create log file
logging.basicConfig(filename=args.logfile,
format='%(asctime)s %(message)s',
level=args.level)
if args.configfile is None:
logging.warning("No configfile specified, using default options")
# Create Application Instance
application_instance = VESApp()
application_instance.init(args.configfile, args.schema)
try:
# Run the plugin
application_instance.run()
except KeyboardInterrupt:
logging.info(" - Ctrl-C handled, exiting gracefully")
except Exception as e:
logging.error('{}, {}'.format(type(e), e))
finally:
application_instance.destroy()
sys.exit()
if __name__ == '__main__':
main()