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# -*- coding: utf-8 -*- |
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# |
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# This file is part of Glances. |
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# |
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# Copyright (C) 2017 Nicolargo <[email protected]> |
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# |
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# Glances is free software; you can redistribute it and/or modify |
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# it under the terms of the GNU Lesser 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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# Glances 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 Lesser General Public License for more details. |
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# |
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# You should have received a copy of the GNU Lesser 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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"""Init the Glances software.""" |
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# Import system libs |
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import locale |
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import platform |
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import signal |
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import sys |
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# Global name |
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__version__ = '2.8.3' |
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__author__ = 'Nicolas Hennion <[email protected]>' |
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__license__ = 'LGPLv3' |
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# Import psutil |
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try: |
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from psutil import __version__ as psutil_version |
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except ImportError: |
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print('PSutil library not found. Glances cannot start.') |
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sys.exit(1) |
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# Import Glances libs |
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# Note: others Glances libs will be imported optionally |
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from glances.logger import logger |
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from glances.main import GlancesMain |
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from glances.globals import WINDOWS |
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# Check locale |
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try: |
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locale.setlocale(locale.LC_ALL, '') |
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except locale.Error: |
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print("Warning: Unable to set locale. Expect encoding problems.") |
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# Check Python version |
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if sys.version_info < (2, 7) or (3, 0) <= sys.version_info < (3, 3): |
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print('Glances requires at least Python 2.7 or 3.3 to run.') |
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sys.exit(1) |
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# Check PSutil version |
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psutil_min_version = (2, 0, 0) |
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psutil_version_info = tuple([int(num) for num in psutil_version.split('.')]) |
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if psutil_version_info < psutil_min_version: |
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print('PSutil 2.0 or higher is needed. Glances cannot start.') |
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sys.exit(1) |
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def __signal_handler(signal, frame): |
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"""Callback for CTRL-C.""" |
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end() |
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def end(): |
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"""Stop Glances.""" |
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if core.is_standalone(): |
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# Stop the standalone (CLI) |
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standalone.end() |
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logger.info("Stop Glances (with CTRL-C)") |
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elif core.is_client(): |
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# Stop the client |
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client.end() |
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logger.info("Stop Glances client (with CTRL-C)") |
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elif core.is_server(): |
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# Stop the server |
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server.end() |
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logger.info("Stop Glances server (with CTRL-C)") |
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elif core.is_webserver() or core.is_standalone(): |
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# Stop the Web server |
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webserver.end() |
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logger.info("Stop Glances web server(with CTRL-C)") |
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# The end... |
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sys.exit(0) |
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def start_standalone(config, args): |
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"""Start the standalone mode""" |
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logger.info("Start standalone mode") |
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# Share global var |
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global standalone |
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# Import the Glances standalone module |
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from glances.standalone import GlancesStandalone |
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# Init the standalone mode |
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standalone = GlancesStandalone(config=config, args=args) |
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# Start the standalone (CLI) loop |
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standalone.serve_forever() |
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def start_clientbrowser(config, args): |
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"""Start the browser client mode""" |
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logger.info("Start client mode (browser)") |
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# Share global var |
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global client |
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# Import the Glances client browser module |
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from glances.client_browser import GlancesClientBrowser |
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# Init the client |
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client = GlancesClientBrowser(config=config, args=args) |
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# Start the client loop |
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client.serve_forever() |
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# Shutdown the client |
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client.end() |
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def start_client(config, args): |
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"""Start the client mode""" |
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logger.info("Start client mode") |
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# Share global var |
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global client |
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# Import the Glances client browser module |
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from glances.client import GlancesClient |
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# Init the client |
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client = GlancesClient(config=config, args=args) |
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# Test if client and server are in the same major version |
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if not client.login(): |
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logger.critical("The server version is not compatible with the client") |
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sys.exit(2) |
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# Start the client loop |
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client.serve_forever() |
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# Shutdown the client |
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client.end() |
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def start_server(config, args): |
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"""Start the server mode""" |
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logger.info("Start server mode") |
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# Share global var |
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global server |
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# Import the Glances server module |
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from glances.server import GlancesServer |
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server = GlancesServer(cached_time=args.cached_time, |
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config=config, |
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args=args) |
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print('Glances server is running on {}:{}'.format(args.bind_address, args.port)) |
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# Set the server login/password (if -P/--password tag) |
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if args.password != "": |
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server.add_user(args.username, args.password) |
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# Start the server loop |
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server.serve_forever() |
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# Shutdown the server? |
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server.server_close() |
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def start_webserver(config, args): |
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"""Start the Web server mode""" |
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logger.info("Start web server mode") |
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# Share global var |
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global webserver |
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# Import the Glances web server module |
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from glances.webserver import GlancesWebServer |
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# Init the web server mode |
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webserver = GlancesWebServer(config=config, args=args) |
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# Start the web server loop |
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webserver.serve_forever() |
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def main(): |
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"""Main entry point for Glances. |
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Select the mode (standalone, client or server) |
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Run it... |
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""" |
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# Log Glances and PSutil version |
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logger.info('Start Glances {}'.format(__version__)) |
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logger.info('{} {} and PSutil {} detected'.format( |
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platform.python_implementation(), |
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platform.python_version(), |
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psutil_version)) |
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# Share global var |
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global core |
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# Create the Glances main instance |
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core = GlancesMain() |
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config = core.get_config() |
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args = core.get_args() |
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# Catch the CTRL-C signal |
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signal.signal(signal.SIGINT, __signal_handler) |
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# Glances can be ran in standalone, client or server mode |
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if core.is_standalone(): |
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start_standalone(config=config, args=args) |
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elif core.is_client() and not WINDOWS: |
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if core.is_client_browser(): |
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start_clientbrowser(config=config, args=args) |
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else: |
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start_client(config=config, args=args) |
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elif core.is_server(): |
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start_server(config=config, args=args) |
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elif core.is_webserver(): |
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# Web server mode replace the standalone mode on Windows OS |
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# In this case, try to start the web browser mode automaticaly |
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if WINDOWS: |
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args.open_web_browser = True |
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start_webserver(config=config, args=args) |
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nicolargo /
glances
