1 | # -*- coding: utf-8 -*- |
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2 | # |
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3 | # This file is part of Glances. |
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4 | # |
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5 | # Copyright (C) 2019 Nicolargo <[email protected]> |
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6 | # |
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7 | # Glances is free software; you can redistribute it and/or modify |
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8 | # it under the terms of the GNU Lesser General Public License as published by |
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9 | # the Free Software Foundation, either version 3 of the License, or |
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10 | # (at your option) any later version. |
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11 | # |
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12 | # Glances is distributed in the hope that it will be useful, |
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13 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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15 | # GNU Lesser General Public License for more details. |
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16 | # |
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17 | # You should have received a copy of the GNU Lesser General Public License |
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18 | # along with this program. If not, see <http://www.gnu.org/licenses/>. |
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19 | |||
20 | """InfluxDB interface class.""" |
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21 | |||
22 | import sys |
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23 | |||
24 | from glances.logger import logger |
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25 | from glances.exports.glances_export import GlancesExport |
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26 | |||
27 | from influxdb import InfluxDBClient |
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28 | from influxdb.client import InfluxDBClientError |
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29 | |||
30 | |||
31 | class Export(GlancesExport): |
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32 | """This class manages the InfluxDB export module.""" |
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33 | |||
34 | def __init__(self, config=None, args=None): |
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35 | """Init the InfluxDB export IF.""" |
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36 | super(Export, self).__init__(config=config, args=args) |
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37 | |||
38 | # Mandatories configuration keys (additional to host and port) |
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39 | self.user = None |
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40 | self.password = None |
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41 | self.db = None |
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42 | |||
43 | # Optionals configuration keys |
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44 | self.protocol = 'http' |
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45 | self.prefix = None |
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46 | self.tags = None |
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47 | |||
48 | # Load the InfluxDB configuration file |
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49 | self.export_enable = self.load_conf('influxdb', |
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50 | mandatories=['host', 'port', |
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51 | 'user', 'password', |
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52 | 'db'], |
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53 | options=['protocol', |
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54 | 'prefix', |
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55 | 'tags']) |
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56 | if not self.export_enable: |
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57 | sys.exit(2) |
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58 | |||
59 | # Init the InfluxDB client |
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60 | self.client = self.init() |
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61 | |||
62 | def init(self): |
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63 | """Init the connection to the InfluxDB server.""" |
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64 | if not self.export_enable: |
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65 | return None |
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66 | |||
67 | # Correct issue #1530 |
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68 | if self.protocol is not None and (self.protocol.lower() == 'https'): |
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69 | ssl = True |
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70 | else: |
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71 | ssl = False |
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72 | |||
73 | try: |
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74 | db = InfluxDBClient(host=self.host, |
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75 | port=self.port, |
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76 | ssl=ssl, |
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77 | verify_ssl=False, |
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78 | username=self.user, |
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79 | password=self.password, |
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80 | database=self.db) |
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81 | get_all_db = [i['name'] for i in db.get_list_database()] |
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82 | except InfluxDBClientError as e: |
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83 | logger.critical("Cannot connect to InfluxDB database '%s' (%s)" % (self.db, e)) |
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84 | sys.exit(2) |
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85 | |||
86 | if self.db in get_all_db: |
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87 | logger.info( |
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88 | "Stats will be exported to InfluxDB server: {}".format(db._baseurl)) |
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89 | else: |
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90 | logger.critical("InfluxDB database '%s' did not exist. Please create it" % self.db) |
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91 | sys.exit(2) |
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92 | |||
93 | return db |
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94 | |||
95 | def _normalize(self, name, columns, points): |
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96 | """Normalize data for the InfluxDB's data model.""" |
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97 | |||
98 | for i, _ in enumerate(points): |
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99 | # Supported type: |
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100 | # https://docs.influxdata.com/influxdb/v1.5/write_protocols/line_protocol_reference/ |
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101 | if points[i] is None: |
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102 | # Ignore points with None value |
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103 | del(points[i]) |
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104 | del(columns[i]) |
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105 | continue |
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106 | try: |
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107 | points[i] = float(points[i]) |
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108 | except (TypeError, ValueError): |
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109 | pass |
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110 | else: |
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111 | continue |
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112 | try: |
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113 | points[i] = str(points[i]) |
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114 | except (TypeError, ValueError): |
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115 | pass |
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116 | else: |
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117 | continue |
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118 | |||
119 | return [{'measurement': name, |
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120 | 'tags': self.parse_tags(self.tags), |
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121 | 'fields': dict(zip(columns, points))}] |
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122 | |||
123 | def export(self, name, columns, points): |
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124 | """Write the points to the InfluxDB server.""" |
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125 | # Manage prefix |
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126 | if self.prefix is not None: |
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127 | name = self.prefix + '.' + name |
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128 | # Write input to the InfluxDB database |
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129 | try: |
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130 | self.client.write_points(self._normalize(name, columns, points)) |
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131 | except Exception as e: |
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132 | logger.error("Cannot export {} stats to InfluxDB ({})".format(name, |
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133 | e)) |
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134 | else: |
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135 | logger.debug("Export {} stats to InfluxDB".format(name)) |
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136 |
Cyclic imports may cause partly loaded modules to be returned. This might lead to unexpected runtime behavior which is hard to debug.