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# -*- coding: utf-8 -*- |
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# |
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# This file is part of Glances. |
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# |
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# Copyright (C) 2016 Nicolargo <[email protected]> |
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# |
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# Glances is free software; you can redistribute it and/or modify |
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# it under the terms of the GNU Lesser General Public License as published by |
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# the Free Software Foundation, either version 3 of the License, or |
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# (at your option) any later version. |
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# |
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# Glances is distributed in the hope that it will be useful, |
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# but WITHOUT ANY WARRANTY; without even the implied warranty of |
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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# GNU Lesser General Public License for more details. |
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# |
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# You should have received a copy of the GNU Lesser General Public License |
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# along with this program. If not, see <http://www.gnu.org/licenses/>. |
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"""CouchDB interface class.""" |
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import sys |
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from datetime import datetime |
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from glances.compat import NoOptionError, NoSectionError |
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from glances.logger import logger |
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from glances.exports.glances_export import GlancesExport |
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import couchdb |
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import couchdb.mapping |
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class Export(GlancesExport): |
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"""This class manages the CouchDB export module.""" |
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View Code Duplication |
def __init__(self, config=None, args=None): |
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"""Init the CouchDB export IF.""" |
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super(Export, self).__init__(config=config, args=args) |
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# Load the Couchdb configuration file section ([export_couchdb]) |
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self.host = None |
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self.port = None |
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self.user = None |
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self.password = None |
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self.db = None |
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self.export_enable = self.load_conf() |
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if not self.export_enable: |
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sys.exit(2) |
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# Init the CouchDB client |
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self.client = self.init() |
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View Code Duplication |
def load_conf(self, section="couchdb"): |
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"""Load the CouchDB configuration in the Glances configuration file.""" |
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if self.config is None: |
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return False |
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try: |
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self.host = self.config.get_value(section, 'host') |
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self.port = self.config.get_value(section, 'port') |
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self.db = self.config.get_value(section, 'db') |
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except NoSectionError: |
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logger.critical("No CouchDB configuration found") |
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return False |
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except NoOptionError as e: |
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logger.critical("Error in the CouchDB configuration (%s)" % e) |
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return False |
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else: |
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logger.debug("Load CouchDB from the Glances configuration file") |
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# user and password are optional |
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try: |
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self.user = self.config.get_value(section, 'user') |
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self.password = self.config.get_value(section, 'password') |
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except NoOptionError: |
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pass |
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return True |
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def init(self): |
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"""Init the connection to the CouchDB server.""" |
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if not self.export_enable: |
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return None |
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if self.user is None: |
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server_uri = 'http://{}:{}/'.format(self.host, |
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self.port) |
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else: |
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server_uri = 'http://{}:{}@{}:{}/'.format(self.user, |
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self.password, |
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self.host, |
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self.port) |
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try: |
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s = couchdb.Server(server_uri) |
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except Exception as e: |
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logger.critical("Cannot connect to CouchDB server %s (%s)" % (server_uri, e)) |
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sys.exit(2) |
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else: |
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logger.info("Connected to the CouchDB server %s" % server_uri) |
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try: |
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s[self.db] |
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except Exception as e: |
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# Database did not exist |
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# Create it... |
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s.create(self.db) |
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else: |
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logger.info("There is already a %s database" % self.db) |
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return s |
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def database(self): |
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"""Return the CouchDB database object""" |
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return self.client[self.db] |
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def export(self, name, columns, points): |
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"""Write the points to the CouchDB server.""" |
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logger.debug("Export {} stats to CouchDB".format(name)) |
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# Create DB input |
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data = dict(zip(columns, points)) |
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# Set the type to the current stat name |
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data['type'] = name |
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data['time'] = couchdb.mapping.DateTimeField()._to_json(datetime.now()) |
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# Write input to the CouchDB database |
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# Result can be view: http://127.0.0.1:5984/_utils |
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try: |
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self.client[self.db].save(data) |
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except Exception as e: |
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logger.error("Cannot export {} stats to CouchDB ({})".format(name, e)) |
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nicolargo /
glances
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