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# -*- coding: utf-8 -*-
#
# This file is part of Glances.
#
# SPDX-FileCopyrightText: 2022 Nicolas Hennion <nicolas@nicolargo.com>
#
# SPDX-License-Identifier: LGPL-3.0-only
#
"""CouchDB interface class."""
import sys
from datetime import datetime
from glances.logger import logger
from glances.exports.glances_export import GlancesExport
import couchdb
import couchdb.mapping
class Export(GlancesExport):
"""This class manages the CouchDB export module."""
def __init__(self, config=None, args=None):
"""Init the CouchDB export IF."""
super(Export, self).__init__(config=config, args=args)
# Mandatory configuration keys (additional to host and port)
self.db = None
# Optional configuration keys
self.user = None
self.password = None
# Load the Cassandra configuration file section
self.export_enable = self.load_conf('couchdb', mandatories=['host', 'port', 'db'], options=['user', 'password'])
if not self.export_enable:
sys.exit(2)
# Init the CouchDB client
self.client = self.init()
def init(self):
"""Init the connection to the CouchDB server."""
if not self.export_enable:
return None
if self.user is None:
server_uri = 'http://{}:{}/'.format(self.host, self.port)
else:
# Force https if a login/password is provided
# Related to https://github.com/nicolargo/glances/issues/2124
server_uri = 'https://{}:{}@{}:{}/'.format(self.user, self.password, self.host, self.port)
try:
s = couchdb.Server(server_uri)
except Exception as e:
logger.critical("Cannot connect to CouchDB server %s (%s)" % (server_uri, e))
sys.exit(2)
else:
logger.info("Connected to the CouchDB server")
try:
s[self.db]
except Exception:
# Database did not exist
# Create it...
s.create(self.db)
else:
logger.info("There is already a %s database" % self.db)
return s
def database(self):
"""Return the CouchDB database object"""
return self.client[self.db]
def export(self, name, columns, points):
"""Write the points to the CouchDB server."""
logger.debug("Export {} stats to CouchDB".format(name))
# Create DB input
data = dict(zip(columns, points))
# Set the type to the current stat name
data['type'] = name
data['time'] = couchdb.mapping.DateTimeField()._to_json(datetime.now())
# Write data to the CouchDB database
# Result can be seen at: http://127.0.0.1:5984/_utils
try:
self.client[self.db].save(data)
except Exception as e:
logger.error("Cannot export {} stats to CouchDB ({})".format(name, e))