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#!/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 logging
import argparse
try:
import configparser
except ImportError:
import ConfigParser as configparser
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()
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