/usr/lib/python3/dist-packages/glances/core/glances_client.py is in glances 2.1.1-1.
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 | # -*- coding: utf-8 -*-
#
# This file is part of Glances.
#
# Copyright (C) 2014 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."""
# Import system libs
import json
import socket
import sys
try:
from xmlrpc.client import Transport, ServerProxy, ProtocolError, Fault
except ImportError:
# Python 2
from xmlrpclib import Transport, ServerProxy, ProtocolError, Fault
try:
import http.client as httplib
except:
# Python 2
import httplib
# Import Glances libs
from glances.core.glances_globals import version, logger
from glances.core.glances_stats import GlancesStatsClient
from glances.outputs.glances_curses import GlancesCurses
class GlancesClientTransport(Transport):
"""This class overwrite the default XML-RPC transport and manage timeout"""
def set_timeout(self, timeout):
self.timeout = timeout
def make_connection(self, host):
return httplib.HTTPConnection(host, timeout=self.timeout)
class GlancesClient(object):
"""This class creates and manages the TCP client."""
def __init__(self, config=None, args=None):
# Store the arg/config
self.args = args
self.config = config
# Client mode:
self.set_mode()
# Build the URI
if args.password != "":
uri = 'http://{0}:{1}@{2}:{3}'.format(args.username, args.password,
args.client, args.port)
else:
uri = 'http://{0}:{1}'.format(args.client, args.port)
# Try to connect to the URI
transport = GlancesClientTransport()
# Configure the server timeout to 7 seconds
transport.set_timeout(7)
try:
self.client = ServerProxy(uri, transport = transport)
except Exception as e:
logger.error(_("Couldn't create socket {0}: {1}").format(uri, e))
sys.exit(2)
def set_mode(self, mode='glances'):
"""Set the client mode.
- 'glances' = Glances server (default)
- 'snmp' = SNMP (fallback)
"""
self.mode = mode
return self.mode
def get_mode(self):
"""Get the client mode.
- 'glances' = Glances server (default)
- 'snmp' = SNMP (fallback)
"""
return self.mode
def login(self):
"""Logon to the server."""
ret = True
if not self.args.snmp_force:
# First of all, trying to connect to a Glances server
self.set_mode('glances')
client_version = None
try:
client_version = self.client.init()
except socket.error as err:
# Fallback to SNMP
logger.error(_("Connection to Glances server failed"))
self.set_mode('snmp')
fallbackmsg = _("Trying fallback to SNMP...")
print(fallbackmsg)
except ProtocolError as err:
# Others errors
if str(err).find(" 401 ") > 0:
logger.error(_("Connection to server failed (Bad password)"))
else:
logger.error(_("Connection to server failed ({0})").format(err))
sys.exit(2)
if self.get_mode() == 'glances' and version[:3] == client_version[:3]:
# Init stats
self.stats = GlancesStatsClient()
self.stats.set_plugins(json.loads(self.client.getAllPlugins()))
else:
logger.error("Client version: %s / Server version: %s" % (version, client_version))
else:
self.set_mode('snmp')
if self.get_mode() == 'snmp':
logger.info(_("Trying to grab stats by SNMP..."))
# Fallback to SNMP if needed
from glances.core.glances_stats import GlancesStatsClientSNMP
# Init stats
self.stats = GlancesStatsClientSNMP(args=self.args)
if not self.stats.check_snmp():
logger.error(_("Connection to SNMP server failed"))
sys.exit(2)
if ret:
# Load limits from the configuration file
# Each client can choose its owns limits
self.stats.load_limits(self.config)
# Init screen
self.screen = GlancesCurses(args=self.args)
# Return result
return ret
def update(self):
"""Update stats from Glances/SNMP server."""
if self.get_mode() == 'glances':
return self.update_glances()
elif self.get_mode() == 'snmp':
return self.update_snmp()
else:
self.end()
logger.critical(_("Unknown server mode: {0}").format(self.get_mode()))
sys.exit(2)
def update_glances(self):
"""Get stats from Glances server.
Return the client/server connection status:
- Connected: Connection OK
- Disconnected: Connection NOK
"""
# Update the stats
try:
server_stats = json.loads(self.client.getAll())
server_stats['monitor'] = json.loads(self.client.getAllMonitored())
except socket.error:
# Client cannot get server stats
return "Disconnected"
except Fault:
# Client cannot get server stats (issue #375)
return "Disconnected"
else:
# Put it in the internal dict
self.stats.update(server_stats)
return "Connected"
def update_snmp(self):
"""Get stats from SNMP server.
Return the client/server connection status:
- SNMP: Connection with SNMP server OK
- Disconnected: Connection NOK
"""
# Update the stats
try:
self.stats.update()
except:
# Client can not get SNMP server stats
return "Disconnected"
else:
# Grab success
return "SNMP"
def serve_forever(self):
"""Main client loop."""
while True:
# Update the stats
cs_status = self.update()
# Update the screen
self.screen.update(self.stats, cs_status=cs_status)
def end(self):
"""End of the client session."""
self.screen.end()
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