mirror of
https://github.com/xcat2/confluent.git
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124 lines
3.6 KiB
Python
124 lines
3.6 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright 2014 IBM Corporation
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# This is the main application.
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# It should check for existing UDP socket to negotiate socket listen takeover
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# It will have three paths into it:
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# -Unix domain socket
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# -TLS socket
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# -WSGI
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# Additionally, it will be able to receive particular UDP packets to facilitate
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# Things like heartbeating and discovery
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# It also will optionally snoop SLP DA requests
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import atexit
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import confluent.pluginapi as pluginapi
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import confluent.httpapi as httpapi
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import confluent.sockapi as sockapi
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import eventlet
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#import eventlet.backdoor as backdoor
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import fcntl
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#import multiprocessing
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import sys
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import os
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import signal
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def _daemonize():
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thispid = os.fork()
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if thispid > 0:
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os.waitpid(thispid, 0)
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os._exit(0)
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os.setsid()
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thispid = os.fork()
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if thispid > 0:
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print 'confluent server starting as pid %d' % thispid
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os._exit(0)
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os.closerange(0, 2)
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os.umask(63)
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os.open(os.devnull, os.O_RDWR)
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os.dup2(0, 1)
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os.dup2(0, 2)
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def _updatepidfile():
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pidfile = open('/var/run/confluent/pid', 'w+')
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fcntl.flock(pidfile, fcntl.LOCK_EX)
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pidfile.write(str(os.getpid()))
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fcntl.flock(pidfile, fcntl.LOCK_UN)
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pidfile.close()
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def _checkpidfile():
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try:
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pidfile = open('/var/run/confluent/pid', 'r+')
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fcntl.flock(pidfile, fcntl.LOCK_EX)
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pid = pidfile.read()
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if pid != '':
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print ('/var/run/confluent/pid exists and indicates %s is still '
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'running' % pid)
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sys.exit(1)
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pidfile.write(str(os.getpid()))
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fcntl.flock(pidfile, fcntl.LOCK_UN)
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pidfile.close()
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except IOError:
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pidfile = open('/var/run/confluent/pid', 'w')
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fcntl.flock(pidfile, fcntl.LOCK_EX)
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pidfile.write(str(os.getpid()))
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fcntl.flock(pidfile, fcntl.LOCK_UN)
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pidfile.close()
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pidfile = open('/var/run/confluent/pid', 'r')
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fcntl.flock(pidfile, fcntl.LOCK_SH)
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pid = pidfile.read()
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if pid != str(os.getpid()):
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print ('/var/run/confluent/pid exists and indicates %s is still '
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'running' % pid)
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sys.exit(1)
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fcntl.flock(pidfile, fcntl.LOCK_UN)
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pidfile.close()
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def terminate(signalname, frame):
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sys.exit(0)
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def doexit():
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pidfile = open('/var/run/confluent/pid')
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pid = pidfile.read()
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if pid == str(os.getpid()):
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os.remove('/var/run/confluent/pid')
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def run():
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_checkpidfile()
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pluginapi.load_plugins()
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_daemonize()
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_updatepidfile()
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signal.signal(signal.SIGINT, terminate)
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signal.signal(signal.SIGTERM, terminate)
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#TODO(jbjohnso): eventlet has a bug about unix domain sockets, this code
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#works with bugs fixed
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#dbgsock = eventlet.listen("/var/run/confluent/dbg.sock",
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# family=socket.AF_UNIX)
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#eventlet.spawn_n(backdoor.backdoor_server, dbgsock)
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webservice = httpapi.HttpApi()
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webservice.start()
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sockservice = sockapi.SockApi()
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sockservice.start()
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atexit.register(doexit)
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while 1:
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eventlet.sleep(100)
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