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 | # Copyright (C) 2019 Nicolargo <[email protected]> |
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6 | # |
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7 | # Glances is free software; you can redistribute it and/or modify |
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8 | # it under the terms of the GNU Lesser General Public License as published by |
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9 | # the Free Software Foundation, either version 3 of the License, or |
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10 | # (at your option) any later version. |
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11 | # |
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12 | # Glances is distributed in the hope that it will be useful, |
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13 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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15 | # GNU Lesser General Public License for more details. |
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16 | # |
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17 | # You should have received a copy of the GNU Lesser General Public License |
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18 | # along with this program. If not, see <http://www.gnu.org/licenses/>. |
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19 | |||
20 | """Manage the Glances client browser (list of Glances server).""" |
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21 | |||
22 | import json |
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23 | import socket |
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24 | import threading |
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25 | |||
26 | from glances.compat import Fault, ProtocolError, ServerProxy |
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27 | from glances.client import GlancesClient, GlancesClientTransport |
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28 | from glances.logger import logger, LOG_FILENAME |
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29 | from glances.password_list import GlancesPasswordList as GlancesPassword |
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30 | from glances.static_list import GlancesStaticServer |
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31 | from glances.autodiscover import GlancesAutoDiscoverServer |
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32 | from glances.outputs.glances_curses_browser import GlancesCursesBrowser |
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33 | |||
34 | |||
35 | class GlancesClientBrowser(object): |
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36 | |||
37 | """This class creates and manages the TCP client browser (servers list).""" |
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38 | |||
39 | def __init__(self, config=None, args=None): |
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40 | # Store the arg/config |
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41 | self.args = args |
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42 | self.config = config |
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43 | self.static_server = None |
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44 | self.password = None |
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45 | |||
46 | # Load the configuration file |
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47 | self.load() |
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48 | |||
49 | # Start the autodiscover mode (Zeroconf listener) |
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50 | if not self.args.disable_autodiscover: |
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51 | self.autodiscover_server = GlancesAutoDiscoverServer() |
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52 | else: |
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53 | self.autodiscover_server = None |
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54 | |||
55 | # Init screen |
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56 | self.screen = GlancesCursesBrowser(args=self.args) |
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57 | |||
58 | def load(self): |
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59 | """Load server and password list from the confiuration file.""" |
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60 | # Init the static server list (if defined) |
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61 | self.static_server = GlancesStaticServer(config=self.config) |
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62 | |||
63 | # Init the password list (if defined) |
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64 | self.password = GlancesPassword(config=self.config) |
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65 | |||
66 | def get_servers_list(self): |
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67 | """Return the current server list (list of dict). |
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68 | |||
69 | Merge of static + autodiscover servers list. |
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70 | """ |
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71 | ret = [] |
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72 | |||
73 | if self.args.browser: |
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74 | ret = self.static_server.get_servers_list() |
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75 | if self.autodiscover_server is not None: |
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76 | ret = self.static_server.get_servers_list() + self.autodiscover_server.get_servers_list() |
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77 | |||
78 | return ret |
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79 | |||
80 | def __get_uri(self, server): |
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81 | """Return the URI for the given server dict.""" |
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82 | # Select the connection mode (with or without password) |
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83 | if server['password'] != "": |
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84 | if server['status'] == 'PROTECTED': |
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85 | # Try with the preconfigure password (only if status is PROTECTED) |
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86 | clear_password = self.password.get_password(server['name']) |
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87 | if clear_password is not None: |
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88 | server['password'] = self.password.sha256_hash(clear_password) |
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89 | return 'http://{}:{}@{}:{}'.format(server['username'], server['password'], |
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90 | server['ip'], server['port']) |
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91 | else: |
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92 | return 'http://{}:{}'.format(server['ip'], server['port']) |
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93 | |||
94 | def __update_stats(self, server): |
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95 | """ |
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96 | Update stats for the given server (picked from the server list) |
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97 | """ |
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98 | # Get the server URI |
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99 | uri = self.__get_uri(server) |
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100 | |||
101 | # Try to connect to the server |
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102 | t = GlancesClientTransport() |
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103 | t.set_timeout(3) |
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104 | |||
105 | # Get common stats |
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106 | try: |
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107 | s = ServerProxy(uri, transport=t) |
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The name
s does not conform to the variable naming conventions ((([a-z][a-z0-9_]{2,30})|(_[a-z0-9_]*))$ ).
This check looks for invalid names for a range of different identifiers. You can set regular expressions to which the identifiers must conform if the defaults do not match your requirements. If your project includes a Pylint configuration file, the settings contained in that file take precedence. To find out more about Pylint, please refer to their site.
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108 | except Exception as e: |
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Catching very general exceptions such as
Exception is usually not recommended.
Generally, you would want to handle very specific errors in the exception handler. This ensure that you do not hide other types of errors which should be fixed. So, unless you specifically plan to handle any error, consider adding a more specific exception.
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e does not conform to the variable naming conventions ((([a-z][a-z0-9_]{2,30})|(_[a-z0-9_]*))$ ).
This check looks for invalid names for a range of different identifiers. You can set regular expressions to which the identifiers must conform if the defaults do not match your requirements. If your project includes a Pylint configuration file, the settings contained in that file take precedence. To find out more about Pylint, please refer to their site.
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109 | logger.warning( |
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110 | "Client browser couldn't create socket {}: {}".format(uri, e)) |
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111 | else: |
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112 | # Mandatory stats |
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113 | try: |
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114 | # CPU% |
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115 | cpu_percent = 100 - json.loads(s.getCpu())['idle'] |
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116 | server['cpu_percent'] = '{:.1f}'.format(cpu_percent) |
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117 | # MEM% |
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118 | server['mem_percent'] = json.loads(s.getMem())['percent'] |
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119 | # OS (Human Readable name) |
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120 | server['hr_name'] = json.loads(s.getSystem())['hr_name'] |
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121 | except (socket.error, Fault, KeyError) as e: |
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The name
e does not conform to the variable naming conventions ((([a-z][a-z0-9_]{2,30})|(_[a-z0-9_]*))$ ).
This check looks for invalid names for a range of different identifiers. You can set regular expressions to which the identifiers must conform if the defaults do not match your requirements. If your project includes a Pylint configuration file, the settings contained in that file take precedence. To find out more about Pylint, please refer to their site.
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122 | logger.debug( |
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123 | "Error while grabbing stats form {}: {}".format(uri, e)) |
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124 | server['status'] = 'OFFLINE' |
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125 | except ProtocolError as e: |
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The name
e does not conform to the variable naming conventions ((([a-z][a-z0-9_]{2,30})|(_[a-z0-9_]*))$ ).
This check looks for invalid names for a range of different identifiers. You can set regular expressions to which the identifiers must conform if the defaults do not match your requirements. If your project includes a Pylint configuration file, the settings contained in that file take precedence. To find out more about Pylint, please refer to their site.
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126 | if e.errcode == 401: |
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127 | # Error 401 (Authentication failed) |
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128 | # Password is not the good one... |
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129 | server['password'] = None |
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130 | server['status'] = 'PROTECTED' |
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131 | else: |
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132 | server['status'] = 'OFFLINE' |
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133 | logger.debug("Cannot grab stats from {} ({} {})".format(uri, e.errcode, e.errmsg)) |
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134 | else: |
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135 | # Status |
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136 | server['status'] = 'ONLINE' |
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137 | |||
138 | # Optional stats (load is not available on Windows OS) |
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139 | try: |
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140 | # LOAD |
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141 | load_min5 = json.loads(s.getLoad())['min5'] |
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142 | server['load_min5'] = '{:.2f}'.format(load_min5) |
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143 | except Exception as e: |
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0 ignored issues
–
show
Catching very general exceptions such as
Exception is usually not recommended.
Generally, you would want to handle very specific errors in the exception handler. This ensure that you do not hide other types of errors which should be fixed. So, unless you specifically plan to handle any error, consider adding a more specific exception.
Loading history...
The name
e does not conform to the variable naming conventions ((([a-z][a-z0-9_]{2,30})|(_[a-z0-9_]*))$ ).
This check looks for invalid names for a range of different identifiers. You can set regular expressions to which the identifiers must conform if the defaults do not match your requirements. If your project includes a Pylint configuration file, the settings contained in that file take precedence. To find out more about Pylint, please refer to their site.
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144 | logger.warning( |
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145 | "Error while grabbing stats form {}: {}".format(uri, e)) |
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146 | |||
147 | return server |
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148 | |||
149 | def __display_server(self, server): |
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150 | """ |
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151 | Connect and display the given server |
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152 | """ |
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153 | # Display the Glances client for the selected server |
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154 | logger.debug("Selected server {}".format(server)) |
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155 | |||
156 | # Connection can take time |
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157 | # Display a popup |
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158 | self.screen.display_popup( |
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159 | 'Connect to {}:{}'.format(server['name'], server['port']), duration=1) |
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160 | |||
161 | # A password is needed to access to the server's stats |
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162 | if server['password'] is None: |
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163 | # First of all, check if a password is available in the [passwords] section |
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164 | clear_password = self.password.get_password(server['name']) |
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165 | if (clear_password is None or self.get_servers_list() |
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166 | [self.screen.active_server]['status'] == 'PROTECTED'): |
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167 | # Else, the password should be enter by the user |
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168 | # Display a popup to enter password |
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169 | clear_password = self.screen.display_popup( |
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170 | 'Password needed for {}: '.format(server['name']), is_input=True) |
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171 | # Store the password for the selected server |
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172 | if clear_password is not None: |
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173 | self.set_in_selected('password', self.password.sha256_hash(clear_password)) |
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174 | |||
175 | # Display the Glance client on the selected server |
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176 | logger.info("Connect Glances client to the {} server".format(server['key'])) |
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177 | |||
178 | # Init the client |
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179 | args_server = self.args |
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180 | |||
181 | # Overwrite connection setting |
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182 | args_server.client = server['ip'] |
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183 | args_server.port = server['port'] |
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184 | args_server.username = server['username'] |
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185 | args_server.password = server['password'] |
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186 | client = GlancesClient(config=self.config, args=args_server, return_to_browser=True) |
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187 | |||
188 | # Test if client and server are in the same major version |
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189 | if not client.login(): |
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190 | self.screen.display_popup( |
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191 | "Sorry, cannot connect to '{}'\n" |
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192 | "See '{}' for more details".format(server['name'], LOG_FILENAME)) |
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193 | |||
194 | # Set the ONLINE status for the selected server |
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195 | self.set_in_selected('status', 'OFFLINE') |
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196 | else: |
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197 | # Start the client loop |
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198 | # Return connection type: 'glances' or 'snmp' |
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199 | connection_type = client.serve_forever() |
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200 | |||
201 | try: |
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202 | logger.debug("Disconnect Glances client from the {} server".format(server['key'])) |
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203 | except IndexError: |
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204 | # Server did not exist anymore |
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205 | pass |
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206 | else: |
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207 | # Set the ONLINE status for the selected server |
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208 | if connection_type == 'snmp': |
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209 | self.set_in_selected('status', 'SNMP') |
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210 | else: |
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211 | self.set_in_selected('status', 'ONLINE') |
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212 | |||
213 | # Return to the browser (no server selected) |
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214 | self.screen.active_server = None |
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215 | |||
216 | def __serve_forever(self): |
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217 | """Main client loop.""" |
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218 | # No need to update the server list |
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219 | # It's done by the GlancesAutoDiscoverListener class (autodiscover.py) |
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220 | # Or define staticaly in the configuration file (module static_list.py) |
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221 | # For each server in the list, grab elementary stats (CPU, LOAD, MEM, OS...) |
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222 | thread_list = {} |
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223 | while self.screen.is_end == False: |
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224 | logger.debug("Iter through the following server list: {}".format(self.get_servers_list())) |
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225 | for v in self.get_servers_list(): |
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0 ignored issues
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The name
v does not conform to the variable naming conventions ((([a-z][a-z0-9_]{2,30})|(_[a-z0-9_]*))$ ).
This check looks for invalid names for a range of different identifiers. You can set regular expressions to which the identifiers must conform if the defaults do not match your requirements. If your project includes a Pylint configuration file, the settings contained in that file take precedence. To find out more about Pylint, please refer to their site.
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226 | key = v["key"] |
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227 | thread = thread_list.get(key, None) |
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228 | if thread is None or thread.is_alive() == False: |
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229 | thread = threading.Thread(target=self.__update_stats, args=[v]) |
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230 | thread_list[key] = thread |
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231 | thread.start() |
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232 | |||
233 | # Update the screen (list or Glances client) |
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234 | if self.screen.active_server is None: |
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235 | # Display the Glances browser |
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236 | self.screen.update(self.get_servers_list()) |
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237 | else: |
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238 | # Display the active server |
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239 | self.__display_server(self.get_servers_list()[self.screen.active_server]) |
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240 | |||
241 | # exit key pressed |
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242 | for thread in thread_list.values(): |
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243 | thread.join() |
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244 | |||
245 | def serve_forever(self): |
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246 | """Wrapper to the serve_forever function. |
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247 | |||
248 | This function will restore the terminal to a sane state |
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249 | before re-raising the exception and generating a traceback. |
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250 | """ |
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251 | try: |
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252 | return self.__serve_forever() |
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253 | finally: |
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254 | self.end() |
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255 | |||
256 | def set_in_selected(self, key, value): |
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257 | """Set the (key, value) for the selected server in the list.""" |
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258 | # Static list then dynamic one |
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259 | if self.screen.active_server >= len(self.static_server.get_servers_list()): |
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260 | self.autodiscover_server.set_server( |
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261 | self.screen.active_server - len(self.static_server.get_servers_list()), |
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262 | key, value) |
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263 | else: |
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264 | self.static_server.set_server(self.screen.active_server, key, value) |
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265 | |||
266 | def end(self): |
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267 | """End of the client browser session.""" |
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268 | self.screen.end() |
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269 |
This check looks for invalid names for a range of different identifiers.
You can set regular expressions to which the identifiers must conform if the defaults do not match your requirements.
If your project includes a Pylint configuration file, the settings contained in that file take precedence.
To find out more about Pylint, please refer to their site.