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#!/usr/bin/env python
"""Copyright 2009 Chris Davis
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."""
from os.path import exists
from twisted.application.service import MultiService
from twisted.application.internet import TCPServer, TCPClient, UDPServer
import carbon.instrumentation # fulfill import deps to avoid circularities
from carbon.protocols import protocolManager
def createBaseService(config):
from carbon.conf import settings
from carbon.protocols import (MetricLineReceiver, MetricPickleReceiver,
MetricDatagramReceiver)
root_service = MultiService()
root_service.setName(settings.program)
use_amqp = settings.get("ENABLE_AMQP", False)
if use_amqp:
from carbon import amqp_listener
amqp_host = settings.get("AMQP_HOST", "localhost")
amqp_port = settings.get("AMQP_PORT", 5672)
amqp_user = settings.get("AMQP_USER", "guest")
amqp_password = settings.get("AMQP_PASSWORD", "guest")
amqp_verbose = settings.get("AMQP_VERBOSE", False)
amqp_vhost = settings.get("AMQP_VHOST", "/")
amqp_spec = settings.get("AMQP_SPEC", None)
amqp_exchange_name = settings.get("AMQP_EXCHANGE", "graphite")
for interface, port, protocol in ((settings.LINE_RECEIVER_INTERFACE,
settings.LINE_RECEIVER_PORT,
MetricLineReceiver),
(settings.PICKLE_RECEIVER_INTERFACE,
settings.PICKLE_RECEIVER_PORT,
MetricPickleReceiver)):
if port:
factory = protocolManager.createFactory(protocol)
service = TCPServer(int(port), factory, interface=interface)
service.setServiceParent(root_service)
if settings.ENABLE_UDP_LISTENER:
service = UDPServer(int(settings.UDP_RECEIVER_PORT),
MetricDatagramReceiver(),
interface=settings.UDP_RECEIVER_INTERFACE)
service.setServiceParent(root_service)
if use_amqp:
factory = amqp_listener.createAMQPListener(
amqp_user, amqp_password,
vhost=amqp_vhost, spec=amqp_spec,
exchange_name=amqp_exchange_name,
verbose=amqp_verbose)
service = TCPClient(amqp_host, int(amqp_port), factory)
service.setServiceParent(root_service)
if settings.ENABLE_MANHOLE:
from carbon import manhole
factory = manhole.createManholeListener()
service = TCPServer(int(settings.MANHOLE_PORT), factory,
interface=settings.MANHOLE_INTERFACE)
service.setServiceParent(root_service)
# Instantiate an instrumentation service that will record metrics about
# this service.
from carbon.instrumentation import InstrumentationService
service = InstrumentationService()
service.setServiceParent(root_service)
return root_service
def createCacheService(config):
from carbon.cache import MetricCache
from carbon.conf import settings
from carbon.events import metricReceived
from carbon.protocols import CacheQueryHandler
# Configure application components
metricReceived.installHandler(MetricCache.store)
root_service = createBaseService(config)
factory = protocolManager.createFactory(CacheQueryHandler)
service = TCPServer(int(settings.CACHE_QUERY_PORT), factory,
interface=settings.CACHE_QUERY_INTERFACE)
service.setServiceParent(root_service)
# have to import this *after* settings are defined
from carbon.writer import WriterService
service = WriterService()
service.setServiceParent(root_service)
return root_service
def createAggregatorService(config):
from carbon.events import metricReceived
from carbon.aggregator import receiver
from carbon.aggregator.rules import RuleManager
from carbon.aggregator import client
from carbon.rewrite import RewriteRuleManager
from carbon.conf import settings
root_service = createBaseService(config)
# Configure application components
metricReceived.installHandler(receiver.process)
RuleManager.read_from(settings["aggregation-rules"])
if exists(settings["rewrite-rules"]):
RewriteRuleManager.read_from(settings["rewrite-rules"])
client.connect(settings["DESTINATION_HOST"],
int(settings["DESTINATION_PORT"]))
return root_service
def createRelayService(config):
from carbon.log import msg
from carbon.conf import settings
from carbon.events import metricReceived
from carbon.hashing import setDestinationHosts
from carbon.relay import createClientConnections, relay
from carbon.rules import loadRules, allDestinationServers, parseHostList
root_service = createBaseService(config)
# Configure application components
metricReceived.installHandler(relay)
if settings["RELAY_METHOD"] == "rules":
loadRules(settings["relay-rules"])
createClientConnections(allDestinationServers())
elif settings["RELAY_METHOD"] == "consistent-hashing":
hosts = parseHostList(settings["CH_HOST_LIST"])
msg('consistent-hashing hosts = %s' % str(hosts))
setDestinationHosts(hosts)
createClientConnections(hosts)
return root_service
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