1 | # -*- coding: utf-8 -*- |
||
2 | # |
||
3 | # This file is part of Glances. |
||
4 | # |
||
5 | # Copyright (C) 2015 Nicolargo <[email protected]> |
||
6 | # |
||
7 | # Glances is free software; you can redistribute it and/or modify |
||
8 | # it under the terms of the GNU Lesser General Public License as published by |
||
9 | # the Free Software Foundation, either version 3 of the License, or |
||
10 | # (at your option) any later version. |
||
11 | # |
||
12 | # Glances is distributed in the hope that it will be useful, |
||
13 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
||
14 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
||
15 | # GNU Lesser General Public License for more details. |
||
16 | # |
||
17 | # You should have received a copy of the GNU Lesser General Public License |
||
18 | # along with this program. If not, see <http://www.gnu.org/licenses/>. |
||
19 | |||
20 | """ElasticSearch interface class.""" |
||
21 | |||
22 | import sys |
||
23 | from datetime import datetime |
||
24 | |||
25 | from glances.compat import NoOptionError, NoSectionError |
||
26 | from glances.logger import logger |
||
27 | from glances.exports.glances_export import GlancesExport |
||
28 | |||
29 | from elasticsearch import Elasticsearch, helpers |
||
30 | |||
31 | |||
32 | class Export(GlancesExport): |
||
33 | |||
34 | """This class manages the ElasticSearch (ES) export module.""" |
||
35 | |||
36 | def __init__(self, config=None, args=None): |
||
37 | """Init the ES export IF.""" |
||
38 | super(Export, self).__init__(config=config, args=args) |
||
39 | |||
40 | # Load the ES configuration file |
||
41 | self.host = None |
||
42 | self.port = None |
||
43 | self.index = None |
||
44 | self.export_enable = self.load_conf() |
||
45 | if not self.export_enable: |
||
46 | sys.exit(2) |
||
47 | |||
48 | # Init the ES client |
||
49 | self.client = self.init() |
||
50 | |||
51 | View Code Duplication | def load_conf(self, section="elasticsearch"): |
|
0 ignored issues
–
show
Duplication
introduced
by
Loading history...
|
|||
52 | """Load the ES configuration in the Glances configuration file.""" |
||
53 | if self.config is None: |
||
54 | return False |
||
55 | try: |
||
56 | self.host = self.config.get_value(section, 'host') |
||
57 | self.port = self.config.get_value(section, 'port') |
||
58 | self.index = self.config.get_value(section, 'index') |
||
59 | except NoSectionError: |
||
60 | logger.critical("No ElasticSearch configuration found") |
||
61 | return False |
||
62 | except NoOptionError as e: |
||
63 | logger.critical("Error in the ElasticSearch configuration (%s)" % e) |
||
64 | return False |
||
65 | else: |
||
66 | logger.debug("Load ElasticSearch from the Glances configuration file") |
||
67 | |||
68 | return True |
||
69 | |||
70 | def init(self): |
||
71 | """Init the connection to the ES server.""" |
||
72 | if not self.export_enable: |
||
73 | return None |
||
74 | |||
75 | try: |
||
76 | es = Elasticsearch(hosts=['{}:{}'.format(self.host, self.port)]) |
||
77 | except Exception as e: |
||
78 | logger.critical("Cannot connect to ElasticSearch server %s:%s (%s)" % (self.host, self.port, e)) |
||
79 | sys.exit(2) |
||
80 | else: |
||
81 | logger.info("Connected to the ElasticSearch server %s:%s" % (self.host, self.port)) |
||
82 | |||
83 | try: |
||
84 | index_count = es.count(index=self.index)['count'] |
||
85 | except Exception as e: |
||
86 | # Index did not exist, it will be created at the first write |
||
87 | # Create it... |
||
88 | es.indices.create(self.index) |
||
89 | else: |
||
90 | logger.info("There is already %s entries in the ElasticSearch %s index" % (index_count, self.index)) |
||
91 | |||
92 | return es |
||
93 | |||
94 | def export(self, name, columns, points): |
||
95 | """Write the points to the ES server.""" |
||
96 | logger.debug("Export {} stats to ElasticSearch".format(name)) |
||
97 | |||
98 | # Create DB input |
||
99 | # https://elasticsearch-py.readthedocs.io/en/master/helpers.html |
||
100 | actions = [] |
||
101 | for c, p in zip(columns, points): |
||
102 | action = { |
||
103 | "_index": self.index, |
||
104 | "_type": name, |
||
105 | "_id": c, |
||
106 | "_source": { |
||
107 | "value": str(p), |
||
108 | "timestamp": datetime.now() |
||
109 | } |
||
110 | } |
||
111 | actions.append(action) |
||
112 | |||
113 | # Write input to the ES index |
||
114 | try: |
||
115 | helpers.bulk(self.client, actions) |
||
116 | except Exception as e: |
||
117 | logger.error("Cannot export {} stats to ElasticSearch ({})".format(name, e)) |
||
118 |