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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) 2017 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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"""ElasticSearch interface class.""" |
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import sys |
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from datetime import datetime |
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from glances.logger import logger |
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from glances.exports.glances_export import GlancesExport |
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from elasticsearch import Elasticsearch, helpers |
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class Export(GlancesExport): |
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"""This class manages the ElasticSearch (ES) export module.""" |
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def __init__(self, config=None, args=None): |
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"""Init the ES export IF.""" |
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super(Export, self).__init__(config=config, args=args) |
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# Mandatories configuration keys (additional to host and port) |
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self.index = None |
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# Optionals configuration keys |
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# N/A |
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# Load the ES configuration file |
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self.export_enable = self.load_conf('elasticsearch', |
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mandatories=['host', 'port', 'index'], |
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options=[]) |
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if not self.export_enable: |
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sys.exit(2) |
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# Init the ES client |
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self.client = self.init() |
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def init(self): |
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"""Init the connection to the ES server.""" |
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if not self.export_enable: |
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return None |
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try: |
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es = Elasticsearch(hosts=['{}:{}'.format(self.host, self.port)]) |
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except Exception as e: |
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logger.critical("Cannot connect to ElasticSearch server %s:%s (%s)" % (self.host, self.port, e)) |
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sys.exit(2) |
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else: |
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logger.info("Connected to the ElasticSearch server %s:%s" % (self.host, self.port)) |
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try: |
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index_count = es.count(index=self.index)['count'] |
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except Exception as e: |
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# Index did not exist, it will be created at the first write |
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# Create it... |
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es.indices.create(self.index) |
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else: |
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logger.info("There is already %s entries in the ElasticSearch %s index" % (index_count, self.index)) |
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return es |
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def export(self, name, columns, points): |
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"""Write the points to the ES server.""" |
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logger.debug("Export {} stats to ElasticSearch".format(name)) |
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# Create DB input |
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# https://elasticsearch-py.readthedocs.io/en/master/helpers.html |
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actions = [] |
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for c, p in zip(columns, points): |
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action = { |
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"_index": self.index, |
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"_type": name, |
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"_id": c, |
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"_source": { |
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"value": str(p), |
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"timestamp": datetime.now() |
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} |
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} |
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actions.append(action) |
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# Write input to the ES index |
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try: |
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helpers.bulk(self.client, actions) |
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except Exception as e: |
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logger.error("Cannot export {} stats to ElasticSearch ({})".format(name, e)) |
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nicolargo /
glances
