mirror of
https://github.com/GNS3/gns3-server.git
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07395c9cf2
This is done only if you lock by pid to avoid killing process of another server. Fix #581
271 lines
9.9 KiB
Python
271 lines
9.9 KiB
Python
#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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#
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# Copyright (C) 2015 GNS3 Technologies Inc.
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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"""
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Start the program. Use main.py to load it.
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"""
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import os
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import datetime
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import sys
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import locale
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import argparse
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import psutil
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import asyncio
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from gns3server.server import Server
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from gns3server.web.logger import init_logger
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from gns3server.version import __version__
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from gns3server.config import Config
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from gns3server.modules.project import Project
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from gns3server.crash_report import CrashReport
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import logging
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log = logging.getLogger(__name__)
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def locale_check():
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"""
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Checks if this application runs with a correct locale (i.e. supports UTF-8 encoding) and attempt to fix
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if this is not the case.
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This is to prevent UnicodeEncodeError with unicode paths when using standard library I/O operation
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methods (e.g. os.stat() or os.path.*) which rely on the system or user locale.
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More information can be found there: http://seasonofcode.com/posts/unicode-i-o-and-locales-in-python.html
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or there: http://robjwells.com/post/61198832297/get-your-us-ascii-out-of-my-face
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"""
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# no need to check on Windows or when this application is frozen
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if sys.platform.startswith("win") or hasattr(sys, "frozen"):
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return
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language = encoding = None
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try:
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language, encoding = locale.getlocale()
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except ValueError as e:
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log.error("Could not determine the current locale: {}".format(e))
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if not language and not encoding:
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try:
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log.warn("Could not find a default locale, switching to C.UTF-8...")
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locale.setlocale(locale.LC_ALL, ("C", "UTF-8"))
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except locale.Error as e:
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log.error("Could not switch to the C.UTF-8 locale: {}".format(e))
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raise SystemExit
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elif encoding != "UTF-8":
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log.warn("Your locale {}.{} encoding is not UTF-8, switching to the UTF-8 version...".format(language, encoding))
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try:
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locale.setlocale(locale.LC_ALL, (language, "UTF-8"))
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except locale.Error as e:
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log.error("Could not set an UTF-8 encoding for the {} locale: {}".format(language, e))
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raise SystemExit
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else:
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log.info("Current locale is {}.{}".format(language, encoding))
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def parse_arguments(argv):
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"""
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Parse command line arguments and override local configuration
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:params args: Array of command line arguments
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"""
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parser = argparse.ArgumentParser(description="GNS3 server version {}".format(__version__))
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parser.add_argument("-v", "--version", help="show the version", action="version", version=__version__)
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parser.add_argument("--host", help="run on the given host/IP address")
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parser.add_argument("--port", help="run on the given port", type=int)
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parser.add_argument("--ssl", action="store_true", help="run in SSL mode")
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parser.add_argument("--controller", action="store_true", help="start as a GNS3 controller")
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parser.add_argument("--config", help="Configuration file")
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parser.add_argument("--certfile", help="SSL cert file")
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parser.add_argument("--certkey", help="SSL key file")
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parser.add_argument("--record", help="save curl requests into a file (for developers)")
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parser.add_argument("-L", "--local", action="store_true", help="local mode (allows some insecure operations)")
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parser.add_argument("-A", "--allow", action="store_true", help="allow remote connections to local console ports")
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parser.add_argument("-q", "--quiet", action="store_true", help="do not show logs on stdout")
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parser.add_argument("-d", "--debug", action="store_true", help="show debug logs")
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parser.add_argument("--live", action="store_true", help="enable code live reload")
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parser.add_argument("--shell", action="store_true", help="start a shell inside the server (debugging purpose only you need to install ptpython before)")
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parser.add_argument("--log", help="send output to logfile instead of console")
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parser.add_argument("--daemon", action="store_true", help="start as a daemon")
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parser.add_argument("--pid", help="store process pid")
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args = parser.parse_args(argv)
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if args.config:
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Config.instance(files=[args.config])
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config = Config.instance().get_section_config("Server")
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defaults = {
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"host": config.get("host", "0.0.0.0"),
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"port": config.get("port", 3080),
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"ssl": config.getboolean("ssl", False),
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"certfile": config.get("certfile", ""),
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"certkey": config.get("certkey", ""),
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"record": config.get("record", ""),
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"local": config.getboolean("local", False),
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"controller": config.getboolean("controller", False),
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"allow": config.getboolean("allow_remote_console", False),
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"quiet": config.getboolean("quiet", False),
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"debug": config.getboolean("debug", False),
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"live": config.getboolean("live", False),
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"logfile": config.getboolean("logfile", ""),
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}
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parser.set_defaults(**defaults)
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return parser.parse_args(argv)
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def set_config(args):
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config = Config.instance()
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server_config = config.get_section_config("Server")
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server_config["local"] = str(args.local)
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server_config["controller"] = str(args.controller)
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server_config["allow_remote_console"] = str(args.allow)
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server_config["host"] = args.host
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server_config["port"] = str(args.port)
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server_config["ssl"] = str(args.ssl)
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server_config["certfile"] = args.certfile
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server_config["certkey"] = args.certkey
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server_config["record"] = args.record
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server_config["debug"] = str(args.debug)
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server_config["live"] = str(args.live)
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server_config["shell"] = str(args.shell)
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config.set_section_config("Server", server_config)
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def pid_lock(path):
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"""
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Write the file in a file on the system.
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Check if the process is not already running.
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"""
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if os.path.exists(path):
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pid = None
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try:
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with open(path) as f:
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pid = int(f.read())
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try:
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os.kill(pid, 0) # If the proces is not running kill return an error
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except OSError:
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pid = None
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except OSError as e:
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log.critical("Can't open pid file %s: %s", pid, str(e))
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sys.exit(1)
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if pid:
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log.critical("GNS3 is already running pid: %d", pid)
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sys.exit(1)
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try:
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with open(path, 'w+') as f:
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f.write(str(os.getpid()))
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except OSError as e:
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log.critical("Can't write pid file %s: %s", path, str(e))
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sys.exit(1)
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def kill_ghosts():
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"""
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Kill process from previous GNS3 session
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"""
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detect_process = ["vpcs", "ubridge", "dynamips"]
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for proc in psutil.process_iter():
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try:
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name = proc.name().lower().split(".")[0]
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if name in detect_process:
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proc.kill()
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log.warning("Killed ghost process %s", name)
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except (psutil.NoSuchProcess, psutil.AccessDenied):
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pass
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def run():
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args = parse_arguments(sys.argv[1:])
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if args.daemon and sys.platform.startswith("win"):
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log.critical("Daemon is not supported on Windows")
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sys.exit(1)
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if args.pid:
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pid_lock(args.pid)
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kill_ghosts()
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level = logging.INFO
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if args.debug:
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level = logging.DEBUG
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user_log = init_logger(level, logfile=args.log, quiet=args.quiet)
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user_log.info("GNS3 server version {}".format(__version__))
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current_year = datetime.date.today().year
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user_log.info("Copyright (c) 2007-{} GNS3 Technologies Inc.".format(current_year))
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for config_file in Config.instance().get_config_files():
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user_log.info("Config file {} loaded".format(config_file))
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set_config(args)
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server_config = Config.instance().get_section_config("Server")
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if server_config.getboolean("controller"):
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log.info("Controller mode is enabled.")
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if server_config.getboolean("local"):
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log.warning("Local mode is enabled. Beware, clients will have full control on your filesystem")
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# we only support Python 3 version >= 3.4
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if sys.version_info < (3, 4):
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raise SystemExit("Python 3.4 or higher is required")
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user_log.info("Running with Python {major}.{minor}.{micro} and has PID {pid}".format(
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major=sys.version_info[0], minor=sys.version_info[1],
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micro=sys.version_info[2], pid=os.getpid()))
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# check for the correct locale (UNIX/Linux only)
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locale_check()
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try:
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os.getcwd()
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except FileNotFoundError:
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log.critical("The current working directory doesn't exist")
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return
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Project.clean_project_directory()
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CrashReport.instance()
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host = server_config["host"]
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port = int(server_config["port"])
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server = Server.instance(host, port)
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try:
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server.run()
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except OSError as e:
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# This is to ignore OSError: [WinError 0] The operation completed successfully exception on Windows.
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if not sys.platform.startswith("win") and not e.winerror == 0:
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raise
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except Exception as e:
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log.critical("Critical error while running the server: {}".format(e), exc_info=1)
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CrashReport.instance().capture_exception()
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return
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if args.pid:
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log.info("Remove PID file %s", args.pid)
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try:
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os.remove(args.pid)
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except OSError as e:
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log.critical("Can't remove pid file %s: %s", args.pid, str(e))
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