/usr/lib/python3/dist-packages/glances/client_browser.py is in glances 2.7.1.1-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 | # -*- coding: utf-8 -*-
#
# This file is part of Glances.
#
# Copyright (C) 2016 Nicolargo <nicolas@nicolargo.com>
#
# Glances is free software; you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Glances is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
"""Manage the Glances client browser (list of Glances server)."""
import json
import socket
from glances.compat import Fault, ProtocolError, ServerProxy
from glances.autodiscover import GlancesAutoDiscoverServer
from glances.client import GlancesClient, GlancesClientTransport
from glances.logger import logger
from glances.password_list import GlancesPasswordList as GlancesPassword
from glances.static_list import GlancesStaticServer
from glances.outputs.glances_curses_browser import GlancesCursesBrowser
class GlancesClientBrowser(object):
"""This class creates and manages the TCP client browser (servers list)."""
def __init__(self, config=None, args=None):
# Store the arg/config
self.args = args
self.config = config
self.static_server = None
self.password = None
# Load the configuration file
self.load()
# Start the autodiscover mode (Zeroconf listener)
if not self.args.disable_autodiscover:
self.autodiscover_server = GlancesAutoDiscoverServer()
else:
self.autodiscover_server = None
# Init screen
self.screen = GlancesCursesBrowser(args=self.args)
def load(self):
"""Load server and password list from the confiuration file."""
# Init the static server list (if defined)
self.static_server = GlancesStaticServer(config=self.config)
# Init the password list (if defined)
self.password = GlancesPassword(config=self.config)
def get_servers_list(self):
"""Return the current server list (list of dict).
Merge of static + autodiscover servers list.
"""
ret = []
if self.args.browser:
ret = self.static_server.get_servers_list()
if self.autodiscover_server is not None:
ret = self.static_server.get_servers_list() + self.autodiscover_server.get_servers_list()
return ret
def __get_uri(self, server):
"""Return the URI for the given server dict."""
# Select the connection mode (with or without password)
if server['password'] != "":
if server['status'] == 'PROTECTED':
# Try with the preconfigure password (only if status is PROTECTED)
clear_password = self.password.get_password(server['name'])
if clear_password is not None:
server['password'] = self.password.sha256_hash(clear_password)
return 'http://{}:{}@{}:{}'.format(server['username'], server['password'],
server['ip'], server['port'])
else:
return 'http://{}:{}'.format(server['ip'], server['port'])
def __serve_forever(self):
"""Main client loop."""
while True:
# No need to update the server list
# It's done by the GlancesAutoDiscoverListener class (autodiscover.py)
# Or define staticaly in the configuration file (module static_list.py)
# For each server in the list, grab elementary stats (CPU, LOAD, MEM, OS...)
# logger.debug(self.get_servers_list())
try:
for v in self.get_servers_list():
# Do not retreive stats for statics server
# Why ? Because for each offline servers, the timeout will be reached
# So ? The curse interface freezes
if v['type'] == 'STATIC' and v['status'] in ['UNKNOWN', 'SNMP', 'OFFLINE']:
continue
# Get the server URI
uri = self.__get_uri(v)
# Try to connect to the server
t = GlancesClientTransport()
t.set_timeout(3)
# Get common stats
try:
s = ServerProxy(uri, transport=t)
except Exception as e:
logger.warning(
"Client browser couldn't create socket {}: {}".format(uri, e))
else:
# Mandatory stats
try:
# CPU%
cpu_percent = 100 - json.loads(s.getCpu())['idle']
v['cpu_percent'] = '{:.1f}'.format(cpu_percent)
# MEM%
v['mem_percent'] = json.loads(s.getMem())['percent']
# OS (Human Readable name)
v['hr_name'] = json.loads(s.getSystem())['hr_name']
except (socket.error, Fault, KeyError) as e:
logger.debug(
"Error while grabbing stats form {}: {}".format(uri, e))
v['status'] = 'OFFLINE'
except ProtocolError as e:
if e.errcode == 401:
# Error 401 (Authentication failed)
# Password is not the good one...
v['password'] = None
v['status'] = 'PROTECTED'
else:
v['status'] = 'OFFLINE'
logger.debug("Cannot grab stats from {} ({} {})".format(uri, e.errcode, e.errmsg))
else:
# Status
v['status'] = 'ONLINE'
# Optional stats (load is not available on Windows OS)
try:
# LOAD
load_min5 = json.loads(s.getLoad())['min5']
v['load_min5'] = '{:.2f}'.format(load_min5)
except Exception as e:
logger.warning(
"Error while grabbing stats form {}: {}".format(uri, e))
# List can change size during iteration...
except RuntimeError:
logger.debug(
"Server list dictionnary change inside the loop (wait next update)")
# Update the screen (list or Glances client)
if self.screen.active_server is None:
# Display the Glances browser
self.screen.update(self.get_servers_list())
else:
# Display the Glances client for the selected server
logger.debug("Selected server: {}".format(self.get_servers_list()[self.screen.active_server]))
# Connection can take time
# Display a popup
self.screen.display_popup(
'Connect to {}:{}'.format(v['name'], v['port']), duration=1)
# A password is needed to access to the server's stats
if self.get_servers_list()[self.screen.active_server]['password'] is None:
# First of all, check if a password is available in the [passwords] section
clear_password = self.password.get_password(v['name'])
if (clear_password is None or self.get_servers_list()
[self.screen.active_server]['status'] == 'PROTECTED'):
# Else, the password should be enter by the user
# Display a popup to enter password
clear_password = self.screen.display_popup(
'Password needed for {}: '.format(v['name']), is_input=True)
# Store the password for the selected server
if clear_password is not None:
self.set_in_selected('password', self.password.sha256_hash(clear_password))
# Display the Glance client on the selected server
logger.info("Connect Glances client to the {} server".format(
self.get_servers_list()[self.screen.active_server]['key']))
# Init the client
args_server = self.args
# Overwrite connection setting
args_server.client = self.get_servers_list()[self.screen.active_server]['ip']
args_server.port = self.get_servers_list()[self.screen.active_server]['port']
args_server.username = self.get_servers_list()[self.screen.active_server]['username']
args_server.password = self.get_servers_list()[self.screen.active_server]['password']
client = GlancesClient(config=self.config, args=args_server, return_to_browser=True)
# Test if client and server are in the same major version
if not client.login():
self.screen.display_popup(
"Sorry, cannot connect to '{}'\n"
"See 'glances.log' for more details".format(v['name']))
# Set the ONLINE status for the selected server
self.set_in_selected('status', 'OFFLINE')
else:
# Start the client loop
# Return connection type: 'glances' or 'snmp'
connection_type = client.serve_forever()
try:
logger.debug("Disconnect Glances client from the {} server".format(
self.get_servers_list()[self.screen.active_server]['key']))
except IndexError:
# Server did not exist anymore
pass
else:
# Set the ONLINE status for the selected server
if connection_type == 'snmp':
self.set_in_selected('status', 'SNMP')
else:
self.set_in_selected('status', 'ONLINE')
# Return to the browser (no server selected)
self.screen.active_server = None
def serve_forever(self):
"""Wrapper to the serve_forever function.
This function will restore the terminal to a sane state
before re-raising the exception and generating a traceback.
"""
try:
return self.__serve_forever()
finally:
self.end()
def set_in_selected(self, key, value):
"""Set the (key, value) for the selected server in the list."""
# Static list then dynamic one
if self.screen.active_server >= len(self.static_server.get_servers_list()):
self.autodiscover_server.set_server(
self.screen.active_server - len(self.static_server.get_servers_list()),
key, value)
else:
self.static_server.set_server(self.screen.active_server, key, value)
def end(self):
"""End of the client browser session."""
self.screen.end()
|