1 | # -*- coding: utf-8 -*- |
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2 | # |
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3 | # This file is part of Glances. |
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4 | # |
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5 | # SPDX-FileCopyrightText: 2023 Nicolas Hennion <[email protected]> |
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6 | # |
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7 | # SPDX-License-Identifier: LGPL-3.0-only |
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8 | # |
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9 | # |
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10 | |||
11 | """Init the Glances software.""" |
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12 | |||
13 | # Import system libs |
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14 | import locale |
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15 | import platform |
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16 | import signal |
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17 | import sys |
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18 | |||
19 | # Global name |
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20 | # Version should start and end with a numerical char |
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21 | # See https://packaging.python.org/specifications/core-metadata/#version |
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22 | __version__ = '3.4.0.5' |
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23 | __author__ = 'Nicolas Hennion <[email protected]>' |
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24 | __license__ = 'LGPLv3' |
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25 | |||
26 | # Import psutil |
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27 | try: |
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28 | from psutil import __version__ as psutil_version |
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29 | except ImportError: |
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30 | print('psutil library not found. Glances cannot start.') |
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31 | sys.exit(1) |
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32 | |||
33 | # Import Glances libs |
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34 | # Note: others Glances libs will be imported optionally |
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35 | from glances.compat import PY3 |
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36 | from glances.logger import logger |
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37 | from glances.main import GlancesMain |
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38 | from glances.timer import Counter |
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39 | |||
40 | # Check locale |
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41 | try: |
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42 | locale.setlocale(locale.LC_ALL, '') |
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43 | except locale.Error: |
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44 | print("Warning: Unable to set locale. Expect encoding problems.") |
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45 | |||
46 | # Check Python version |
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47 | if sys.version_info < (2, 7) or (3, 0) <= sys.version_info < (3, 4): |
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48 | print('Glances requires at least Python 2.7 or 3.4 to run.') |
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49 | sys.exit(1) |
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50 | |||
51 | # Check psutil version |
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52 | psutil_min_version = (5, 3, 0) |
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53 | psutil_version_info = tuple([int(num) for num in psutil_version.split('.')]) |
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54 | if psutil_version_info < psutil_min_version: |
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55 | print('psutil 5.3.0 or higher is needed. Glances cannot start.') |
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56 | sys.exit(1) |
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57 | |||
58 | # Trac malloc is only available on Python 3.4 or higher |
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59 | if PY3: |
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60 | import tracemalloc |
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61 | |||
62 | |||
63 | def __signal_handler(signal, frame): |
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64 | logger.debug("Signal {} catched".format(signal)) |
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65 | end() |
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66 | |||
67 | |||
68 | def end(): |
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69 | """Stop Glances.""" |
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70 | try: |
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71 | mode.end() |
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72 | except (NameError, KeyError): |
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73 | # NameError: name 'mode' is not defined in case of interrupt shortly... |
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74 | # ...after starting the server mode (issue #1175) |
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75 | pass |
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76 | |||
77 | logger.info("Glances stopped gracefully") |
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78 | |||
79 | # The end... |
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80 | sys.exit(0) |
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81 | |||
82 | |||
83 | def start(config, args): |
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84 | """Start Glances.""" |
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85 | |||
86 | # Load mode |
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87 | global mode |
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88 | |||
89 | if args.trace_malloc or args.memory_leak: |
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90 | tracemalloc.start() |
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91 | |||
92 | start_duration = Counter() |
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93 | |||
94 | if core.is_standalone(): |
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95 | from glances.standalone import GlancesStandalone as GlancesMode |
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96 | elif core.is_client(): |
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97 | if core.is_client_browser(): |
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98 | from glances.client_browser import GlancesClientBrowser as GlancesMode |
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99 | else: |
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100 | from glances.client import GlancesClient as GlancesMode |
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101 | elif core.is_server(): |
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102 | from glances.server import GlancesServer as GlancesMode |
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103 | elif core.is_webserver(): |
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104 | from glances.webserver import GlancesWebServer as GlancesMode |
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105 | |||
106 | # Init the mode |
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107 | logger.info("Start {} mode".format(GlancesMode.__name__)) |
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108 | mode = GlancesMode(config=config, args=args) |
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109 | |||
110 | # Start the main loop |
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111 | logger.debug("Glances started in {} seconds".format(start_duration.get())) |
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112 | if args.stop_after: |
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113 | logger.info('Glances will be stopped in ~{} seconds'.format(args.stop_after * args.time * args.memory_leak * 2)) |
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114 | |||
115 | if args.memory_leak: |
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116 | print( |
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117 | 'Memory leak detection, please wait ~{} seconds...'.format( |
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118 | args.stop_after * args.time * args.memory_leak * 2 |
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119 | ) |
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120 | ) |
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121 | # First run without dump to fill the memory |
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122 | mode.serve_n(args.stop_after) |
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123 | # Then start the memory-leak loop |
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124 | snapshot_begin = tracemalloc.take_snapshot() |
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125 | |||
126 | if args.stdout_issue or args.stdout_apidoc: |
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127 | # Serve once for issue/test mode |
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128 | mode.serve_issue() |
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129 | else: |
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130 | # Serve forever |
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131 | mode.serve_forever() |
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132 | |||
133 | if args.memory_leak: |
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134 | snapshot_end = tracemalloc.take_snapshot() |
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135 | snapshot_diff = snapshot_end.compare_to(snapshot_begin, 'filename') |
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136 | memory_leak = sum([s.size_diff for s in snapshot_diff]) |
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137 | print("Memory consumption: {0:.1f}KB (see log for details)".format(memory_leak / 1000)) |
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138 | logger.info("Memory consumption (top 5):") |
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139 | for stat in snapshot_diff[:5]: |
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140 | logger.info(stat) |
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141 | elif args.trace_malloc: |
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142 | # See more options here: https://docs.python.org/3/library/tracemalloc.html |
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143 | snapshot = tracemalloc.take_snapshot() |
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144 | top_stats = snapshot.statistics("filename") |
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145 | print("[ Trace malloc - Top 10 ]") |
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146 | for stat in top_stats[:10]: |
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147 | print(stat) |
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148 | |||
149 | # Shutdown |
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150 | mode.end() |
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151 | |||
152 | |||
153 | def main(): |
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154 | """Main entry point for Glances. |
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155 | |||
156 | Select the mode (standalone, client or server) |
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157 | Run it... |
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158 | """ |
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159 | # SIGHUP not available on Windows (see issue #2408) |
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160 | if sys.platform.startswith('win'): |
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161 | signal_list = (signal.SIGTERM, signal.SIGINT) |
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162 | else: |
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163 | signal_list = (signal.SIGTERM, signal.SIGINT, signal.SIGHUP) |
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164 | # Catch the kill signal |
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165 | for sig in signal_list: |
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166 | signal.signal(sig, __signal_handler) |
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167 | |||
168 | # Log Glances and psutil version |
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169 | logger.info('Start Glances {}'.format(__version__)) |
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170 | logger.info( |
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171 | '{} {} ({}) and psutil {} detected'.format( |
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172 | platform.python_implementation(), platform.python_version(), sys.executable, psutil_version |
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173 | ) |
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174 | ) |
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175 | |||
176 | # Share global var |
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177 | global core |
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178 | |||
179 | # Create the Glances main instance |
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180 | # Glances options from the command line are read first (in __init__) |
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181 | # then the options from the config file (in parse_args) |
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182 | core = GlancesMain() |
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183 | |||
184 | # Glances can be ran in standalone, client or server mode |
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185 | start(config=core.get_config(), args=core.get_args()) |
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186 |