# -*- coding: utf-8 -*-
#
# This file is part of Glances.
#
# SPDX-FileCopyrightText: 2022 Nicolas Hennion <nicolas@nicolargo.com>
#
# SPDX-License-Identifier: LGPL-3.0-only
#
"""The stats manager."""
import re
from glances.stats import GlancesStats
from glances.compat import iteritems
from glances.logger import logger
# SNMP OID regexp pattern to short system name dict
oid_to_short_system_name = {
'.*Linux.*': 'linux',
'.*Darwin.*': 'mac',
'.*BSD.*': 'bsd',
'.*Windows.*': 'windows',
'.*Cisco.*': 'cisco',
'.*VMware ESXi.*': 'esxi',
'.*NetApp.*': 'netapp',
}
class GlancesStatsClientSNMP(GlancesStats):
"""This class stores, updates and gives stats for the SNMP client."""
def __init__(self, config=None, args=None):
super(GlancesStatsClientSNMP, self).__init__()
# Init the configuration
self.config = config
# Init the arguments
self.args = args
# OS name is used because OID is different between system
self.os_name = None
# Load AMPs, plugins and exports modules
self.load_modules(self.args)
def check_snmp(self):
"""Check if SNMP is available on the server."""
# Import the SNMP client class
from glances.snmp import GlancesSNMPClient
# Create an instance of the SNMP client
snmp_client = GlancesSNMPClient(
host=self.args.client,
port=self.args.snmp_port,
version=self.args.snmp_version,
community=self.args.snmp_community,
user=self.args.snmp_user,
auth=self.args.snmp_auth,
)
# If we cannot grab the hostname, then exit...
ret = snmp_client.get_by_oid("1.3.6.1.2.1.1.5.0") != {}
if ret:
# Get the OS name (need to grab the good OID...)
oid_os_name = snmp_client.get_by_oid("1.3.6.1.2.1.1.1.0")
try:
self.system_name = self.get_system_name(oid_os_name['1.3.6.1.2.1.1.1.0'])
logger.info("SNMP system name detected: {}".format(self.system_name))
except KeyError:
self.system_name = None
logger.warning("Cannot detect SNMP system name")
return ret
def get_system_name(self, oid_system_name):
"""Get the short os name from the OS name OID string."""
short_system_name = None
if oid_system_name == '':
return short_system_name
# Find the short name in the oid_to_short_os_name dict
for r, v in iteritems(oid_to_short_system_name):
if re.search(r, oid_system_name):
short_system_name = v
break
return short_system_name
def update(self):
"""Update the stats using SNMP."""
# For each plugins, call the update method
for p in self._plugins:
if self._plugins[p].is_disabled():
# If current plugin is disable
# then continue to next plugin
continue
# Set the input method to SNMP
self._plugins[p].input_method = 'snmp'
self._plugins[p].short_system_name = self.system_name
# Update the stats...
try:
self._plugins[p].update()
except Exception as e:
logger.error("Update {} failed: {}".format(p, e))
else:
# ... the history
self._plugins[p].update_stats_history()
# ... and the views
self._plugins[p].update_views()
|