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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."""
#
# How to test ?
#
# 1) docker run -d -e COUCHDB_USER=admin -e COUCHDB_PASSWORD=admin -p 5984:5984 --name my-couchdb couchdb
# 2) ./venv/bin/python -m glances -C ./conf/glances.conf --export couchdb --quiet
# 3) Result can be seen at: http://127.0.0.1:5984/_utils
#
import sys
from datetime import datetime
from glances.logger import logger
from glances.exports.export import GlancesExport
import pycouchdb
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)
# Load the CouchDB configuration file section
# User and Password are mandatory with CouchDB 3.0 and higher
self.export_enable = self.load_conf('couchdb', mandatories=['host', 'port', 'db', '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
# @TODO: https
server_uri = 'http://{}:{}@{}:{}/'.format(self.user, self.password, self.host, self.port)
try:
s = pycouchdb.Server(server_uri)
except Exception as e:
logger.critical("Cannot connect to CouchDB server (%s)" % e)
sys.exit(2)
else:
logger.info("Connected to the CouchDB server version %s" % s.info()['version'])
try:
s.database(self.db)
except Exception:
# Database did not exist
# Create it...
s.create(self.db)
logger.info("Create CouchDB database %s" % self.db)
else:
logger.info("CouchDB database %s already exist" % self.db)
return s.database(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))
# Add the type and the timestamp in ISO format
data['type'] = name
data['time'] = datetime.now().isoformat()[:-3] + 'Z'
# Write data to the CouchDB database
try:
self.client.save(data)
except Exception as e:
logger.error("Cannot export {} stats to CouchDB ({})".format(name, e))
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