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 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)
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://{0}:{1}@{2}:{3}'.format(server['username'],
server['password'],
server['ip'],
server['port'])
else:
return 'http://{0}:{1}'.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 {0}: {1}".
format(uri, e))
else:
# Mandatory stats
try:
# CPU%
cpu_percent = 100 - json.loads(s.getCpu())['idle']
v['cpu_percent'] = '{0:.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 {0}: {1}".
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 {0} ({1} {2})".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'] = '{0:.2f}'.format(load_min5)
except Exception as e:
logger.warning(
"Error while grabbing stats form {0}: {1}".
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: {0}".format(
self.get_servers_list()[self.screen.active_server]))
# Connection can take time
# Display a popup
self.screen.display_popup('Connect to {0}:{1}'.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 {0}: '.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 {0} 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 '{0}'\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 {0} 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()
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://{0}:{1}@{2}:{3}'.format(server['username'], server['password'],
server['ip'], server['port'])
else:
return 'http://{0}:{1}'.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 {0}: {1}".format(uri, e))
else:
# Mandatory stats
try:
# CPU%
cpu_percent = 100 - json.loads(s.getCpu())['idle']
v['cpu_percent'] = '{0:.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 {0}: {1}".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 {0} ({1} {2})".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'] = '{0:.2f}'.format(load_min5)
except Exception as e:
logger.warning(
"Error while grabbing stats form {0}: {1}".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 not self.screen.active_server:
# Display the Glances browser
self.screen.update(self.get_servers_list())
else:
# Display the Glances client for the selected server
logger.debug("Selected server: {0}".format(self.get_servers_list()[self.screen.active_server]))
# Connection can take time
# Display a popup
self.screen.display_popup(
'Connect to {0}:{1}'.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 {0}: '.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 {0} 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 '{0}'\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 {0} 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()