removed old script file from 5.1 merge
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Blake J. Harnden
parent
d988ff86d1
commit
90f95c633f
1 changed files with 0 additions and 357 deletions
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#!/usr/bin/env python
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#
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# CORE
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# Copyright (c)2010-2013 the Boeing Company.
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# See the LICENSE file included in this distribution.
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#
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# authors: Tom Goff <thomas.goff@boeing.com>
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# Jeff Ahrenholz <jeffrey.m.ahrenholz@boeing.com>
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#
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"""
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core-daemon: the CORE daemon is a server process that receives CORE API
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messages and instantiates emulated nodes and networks within the kernel. Various
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message handlers are defined and some support for sending messages.
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"""
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import ConfigParser
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import atexit
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import importlib
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import optparse
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import os
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import signal
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import socket
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import sys
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import threading
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import time
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from pkg_resources import require
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require("core_python", "corens3_python", "core_python_netns")
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from core import constants
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from core import corehandlers
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from core import coreserver
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from core import enumerations
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from core import logger
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from core import services
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from core.api import coreapi
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from core.corehandlers import CoreDatagramRequestHandler
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from core.enumerations import MessageFlags
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from core.enumerations import RegisterTlvs
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from core.misc import nodemaps
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from core.misc import nodeutils
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from core.misc.utils import closeonexec
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from core.misc.utils import daemonize
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DEFAULT_MAXFD = 1024
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def startudp(core_server, server_address):
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"""
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Start a thread running a UDP server on the same host,port for connectionless requests.
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:param core.coreserver.CoreServer core_server: core server instance
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:param tuple[str, int] server_address: server address
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:return: created core udp server
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:rtype: core.coreserver.CoreUdpServer
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"""
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core_server.udpserver = coreserver.CoreUdpServer(server_address, CoreDatagramRequestHandler, core_server)
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core_server.udpthread = threading.Thread(target=core_server.udpserver.start)
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core_server.udpthread.daemon = True
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core_server.udpthread.start()
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return core_server.udpserver
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def startaux(core_server, aux_address, aux_handler):
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"""
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Start a thread running an auxiliary TCP server on the given address.
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This server will communicate with client requests using a handler
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using the aux_handler class. The aux_handler can provide an alternative
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API to CORE.
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:param core.coreserver.CoreServer core_server: core server instance
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:param tuple[str, int] aux_address: auxiliary server address
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:param str aux_handler: auxiliary handler string to import
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:return: auxiliary server
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"""
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handlermodname, dot, handlerclassname = aux_handler.rpartition(".")
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handlermod = importlib.import_module(handlermodname)
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handlerclass = getattr(handlermod, handlerclassname)
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core_server.auxserver = coreserver.CoreAuxServer(aux_address, handlerclass, core_server)
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core_server.auxthread = threading.Thread(target=core_server.auxserver.start)
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core_server.auxthread.daemon = True
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core_server.auxthread.start()
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return core_server.auxserver
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def banner():
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"""
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Output the program banner printed to the terminal or log file.
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:return: nothing
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"""
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logger.info("CORE daemon v.%s started %s\n" % (constants.COREDPY_VERSION, time.ctime()))
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def cored(cfg=None):
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"""
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Start the CoreServer object and enter the server loop.
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:param dict cfg: core configuration
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:return: nothing
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"""
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host = cfg["listenaddr"]
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port = int(cfg["port"])
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if host == "" or host is None:
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host = "localhost"
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try:
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server = coreserver.CoreServer((host, port), corehandlers.CoreRequestHandler, cfg)
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except:
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logger.exception("error starting main server on: %s:%s", host, port)
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sys.exit(1)
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closeonexec(server.fileno())
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logger.info("main server started, listening on: %s:%s\n" % (host, port))
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udpserver = startudp(server, (host, port))
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closeonexec(udpserver.fileno())
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auxreqhandler = cfg["aux_request_handler"]
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if auxreqhandler:
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handler, auxport = auxreqhandler.rsplit(":")
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auxserver = startaux(server, (host, int(auxport)), handler)
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closeonexec(auxserver.fileno())
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server.serve_forever()
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# TODO: should sessions and the main core daemon both catch at exist to shutdown independently?
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def cleanup():
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"""
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Runs server shutdown and cleanup when catching an exit signal.
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:return: nothing
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"""
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while coreserver.CoreServer.servers:
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server = coreserver.CoreServer.servers.pop()
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server.shutdown()
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atexit.register(cleanup)
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def sighandler(signum, stackframe):
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"""
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Signal handler when different signals are sent.
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:param int signum: singal number sent
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:param stackframe: stack frame sent
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:return: nothing
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"""
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logger.error("terminated by signal: %s", signum)
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sys.exit(signum)
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signal.signal(signal.SIGHUP, sighandler)
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signal.signal(signal.SIGINT, sighandler)
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signal.signal(signal.SIGTERM, sighandler)
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signal.signal(signal.SIGUSR1, sighandler)
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signal.signal(signal.SIGUSR2, sighandler)
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def logrotate(stdout, stderr, stdoutmode=0644, stderrmode=0644):
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"""
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Log rotation method.
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:param stdout: stdout
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:param stderr: stderr
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:param int stdoutmode: stdout mode
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:param int stderrmode: stderr mode
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:return:
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"""
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def reopen(fileno, filename, mode):
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err = 0
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fd = -1
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try:
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fd = os.open(filename,
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os.O_WRONLY | os.O_CREAT | os.O_APPEND, mode)
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os.dup2(fd, fileno)
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except OSError as e:
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err = e.errno
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finally:
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if fd >= 0:
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os.close(fd)
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return err
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if stdout:
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err = reopen(1, stdout, stdoutmode)
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if stderr:
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if stderr == stdout and not err:
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try:
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os.dup2(1, 2)
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except OSError as e:
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pass
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else:
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reopen(2, stderr, stderrmode)
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def get_merged_config(filename):
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"""
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Return a configuration after merging config file and command-line arguments.
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:param str filename: file name to merge configuration settings with
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:return: merged configuration
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:rtype: dict
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"""
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# these are the defaults used in the config file
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defaults = {"port": "%d" % enumerations.CORE_API_PORT,
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"listenaddr": "localhost",
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"pidfile": "%s/run/core-daemon.pid" % constants.CORE_STATE_DIR,
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"logfile": "%s/log/core-daemon.log" % constants.CORE_STATE_DIR,
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"xmlfilever": "1.0",
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"numthreads": "1",
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"verbose": "False",
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"daemonize": "False",
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"debug": "False",
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"execfile": None,
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"aux_request_handler": None,
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}
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usagestr = "usage: %prog [-h] [options] [args]\n\n" + \
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"CORE daemon v.%s instantiates Linux network namespace " \
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"nodes." % constants.COREDPY_VERSION
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parser = optparse.OptionParser(usage=usagestr)
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parser.add_option("-f", "--configfile", dest="configfile",
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type="string",
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help="read config from specified file; default = %s" %
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filename)
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parser.add_option("-d", "--daemonize", dest="daemonize",
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action="store_true",
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help="run in background as daemon; default=%s" % \
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defaults["daemonize"])
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parser.add_option("-e", "--execute", dest="execfile", type="string",
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help="execute a Python/XML-based session")
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parser.add_option("-l", "--logfile", dest="logfile", type="string",
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help="log output to specified file; default = %s" %
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defaults["logfile"])
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parser.add_option("-p", "--port", dest="port", type=int,
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help="port number to listen on; default = %s" % \
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defaults["port"])
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parser.add_option("-i", "--pidfile", dest="pidfile",
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help="filename to write pid to; default = %s" % \
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defaults["pidfile"])
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parser.add_option("-t", "--numthreads", dest="numthreads", type=int,
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help="number of server threads; default = %s" % \
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defaults["numthreads"])
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parser.add_option("-v", "--verbose", dest="verbose", action="store_true",
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help="enable verbose logging; default = %s" % \
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defaults["verbose"])
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parser.add_option("-g", "--debug", dest="debug", action="store_true",
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help="enable debug logging; default = %s" % \
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defaults["debug"])
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# parse command line options
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options, args = parser.parse_args()
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# read the config file
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if options.configfile is not None:
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filename = options.configfile
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del options.configfile
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cfg = ConfigParser.SafeConfigParser(defaults)
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cfg.read(filename)
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section = "core-daemon"
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if not cfg.has_section(section):
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cfg.add_section(section)
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# gracefully support legacy configs (cored.py/cored now core-daemon)
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if cfg.has_section("cored.py"):
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for name, val in cfg.items("cored.py"):
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if name == "pidfile" or name == "logfile":
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bn = os.path.basename(val).replace("coredpy", "core-daemon")
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val = os.path.join(os.path.dirname(val), bn)
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cfg.set(section, name, val)
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if cfg.has_section("cored"):
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for name, val in cfg.items("cored"):
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if name == "pidfile" or name == "logfile":
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bn = os.path.basename(val).replace("cored", "core-daemon")
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val = os.path.join(os.path.dirname(val), bn)
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cfg.set(section, name, val)
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# merge command line with config file
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for opt in options.__dict__:
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val = options.__dict__[opt]
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if val is not None:
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cfg.set(section, opt, val.__str__())
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return dict(cfg.items(section)), args
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def exec_file(cfg):
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"""
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Send a Register Message to execute a new session based on XML or Python script file.
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:param dict cfg: configuration settings
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:return: 0
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"""
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filename = cfg["execfile"]
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logger.info("Telling daemon to execute file: %s...", filename)
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tlvdata = coreapi.CoreRegisterTlv.pack(RegisterTlvs.EXECUTE_SERVER.value, filename)
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msg = coreapi.CoreRegMessage.pack(MessageFlags.ADD.value, tlvdata)
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sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
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# TODO: connect address option
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sock.connect(("localhost", int(cfg["port"])))
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sock.sendall(msg)
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return 0
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def main():
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"""
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Main program startup.
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:return: nothing
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"""
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# get a configuration merged from config file and command-line arguments
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cfg, args = get_merged_config("%s/core.conf" % constants.CORE_CONF_DIR)
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for a in args:
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logger.error("ignoring command line argument: %s", a)
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if cfg["daemonize"] == "True":
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daemonize(rootdir=None, umask=0, close_fds=False,
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stdin=os.devnull,
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stdout=cfg["logfile"], stderr=cfg["logfile"],
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pidfilename=cfg["pidfile"],
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defaultmaxfd=DEFAULT_MAXFD)
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signal.signal(signal.SIGUSR1, lambda signum, stackframe:
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logrotate(stdout=cfg["logfile"], stderr=cfg["logfile"]))
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banner()
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if cfg["execfile"]:
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cfg["execfile"] = os.path.abspath(cfg["execfile"])
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sys.exit(exec_file(cfg))
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try:
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cored(cfg)
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except KeyboardInterrupt:
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logger.info("keyboard interrupt, stopping core daemon")
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sys.exit(0)
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if __name__ == "__main__":
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# configure nodes to use
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node_map = nodemaps.NODES
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if len(sys.argv) == 2 and sys.argv[1] == "ovs":
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from core.netns.openvswitch import OVS_NODES
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node_map.update(OVS_NODES)
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# update with BSD based nodes
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if os.uname()[0] == "FreeBSD":
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from core.bsd.nodes import BSD_NODES
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node_map.update(BSD_NODES)
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nodeutils.set_node_map(node_map)
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# load default services
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services.load()
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main()
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