|
1
|
|
|
# |
|
2
|
|
|
# This file is part of Glances. |
|
3
|
|
|
# |
|
4
|
|
|
# SPDX-FileCopyrightText: 2022 Nicolas Hennion <[email protected]> |
|
5
|
|
|
# |
|
6
|
|
|
# SPDX-License-Identifier: LGPL-3.0-only |
|
7
|
|
|
# |
|
8
|
|
|
|
|
9
|
|
|
"""Prometheus interface class.""" |
|
10
|
|
|
|
|
11
|
|
|
import sys |
|
12
|
|
|
from numbers import Number |
|
13
|
|
|
|
|
14
|
|
|
from prometheus_client import Gauge, start_http_server |
|
15
|
|
|
|
|
16
|
|
|
from glances.api import GlancesStats |
|
17
|
|
|
from glances.exports.export import GlancesExport |
|
18
|
|
|
from glances.globals import listkeys |
|
19
|
|
|
from glances.logger import logger |
|
20
|
|
|
|
|
21
|
|
|
class Export(GlancesExport): |
|
22
|
|
|
"""This class manages the Prometheus export module.""" |
|
23
|
|
|
|
|
24
|
|
|
METRIC_SEPARATOR = '_' |
|
25
|
|
|
|
|
26
|
|
|
def __init__(self, config=None, args=None): |
|
27
|
|
|
"""Init the Prometheus export IF.""" |
|
28
|
|
|
super().__init__(config=config, args=args) |
|
29
|
|
|
|
|
30
|
|
|
# Load the Prometheus configuration file section |
|
31
|
|
|
self.export_enable = self.load_conf('prometheus', mandatories=['host', 'port', 'labels'], options=['prefix']) |
|
32
|
|
|
if not self.export_enable: |
|
33
|
|
|
exit('Missing PROMETHEUS config') |
|
34
|
|
|
|
|
35
|
|
|
# Optionals configuration keys |
|
36
|
|
|
if self.prefix is None: |
|
37
|
|
|
self.prefix = 'glances' |
|
38
|
|
|
|
|
39
|
|
|
if self.labels is None: |
|
40
|
|
|
self.labels = 'src:glances' |
|
41
|
|
|
|
|
42
|
|
|
# Init the metric dict |
|
43
|
|
|
# Perhaps a better method is possible... |
|
44
|
|
|
self._metric_dict = {} |
|
45
|
|
|
|
|
46
|
|
|
self._stats = GlancesStats() |
|
47
|
|
|
|
|
48
|
|
|
# Init the Prometheus Exporter |
|
49
|
|
|
self.init() |
|
50
|
|
|
|
|
51
|
|
|
def init(self): |
|
52
|
|
|
"""Init the Prometheus Exporter""" |
|
53
|
|
|
try: |
|
54
|
|
|
start_http_server(port=int(self.port), addr=self.host) |
|
55
|
|
|
except Exception as e: |
|
56
|
|
|
logger.critical(f"Can not start Prometheus exporter on {self.host}:{self.port} ({e})") |
|
57
|
|
|
sys.exit(2) |
|
58
|
|
|
else: |
|
59
|
|
|
logger.info(f"Start Prometheus exporter on {self.host}:{self.port}") |
|
60
|
|
|
|
|
61
|
|
|
def export(self, name, columns, points): |
|
62
|
|
|
"""Write the points to the Prometheus exporter using Gauge.""" |
|
63
|
|
|
logger.debug(f"Export {name} stats to Prometheus exporter") |
|
64
|
|
|
|
|
65
|
|
|
# Remove non number stats and convert all to float (for Boolean) |
|
66
|
|
|
data = {str(k): float(v) for k, v in zip(columns, points) if isinstance(v, Number)} |
|
67
|
|
|
|
|
68
|
|
|
key_name = self._stats.get_plugin(name).get_key() |
|
69
|
|
|
|
|
70
|
|
|
# Write metrics to the Prometheus exporter |
|
71
|
|
|
for metric, value in data.items(): |
|
72
|
|
|
labels = self.labels |
|
73
|
|
|
metric_name = self.prefix + self.METRIC_SEPARATOR + name + self.METRIC_SEPARATOR |
|
74
|
|
|
try: |
|
75
|
|
|
obj, stat = metric.split('.') |
|
76
|
|
|
metric_name += stat |
|
77
|
|
|
labels += f",{key_name}:{obj}" |
|
78
|
|
|
except ValueError: |
|
79
|
|
|
metric_name += metric |
|
80
|
|
|
|
|
81
|
|
|
# Prometheus is very sensible to the metric name |
|
82
|
|
|
# See: https://prometheus.io/docs/practices/naming/ |
|
83
|
|
|
for c in ' .-/:[]': |
|
84
|
|
|
metric_name = metric_name.replace(c, self.METRIC_SEPARATOR) |
|
85
|
|
|
|
|
86
|
|
|
# Get the labels |
|
87
|
|
|
labels = self.parse_tags(labels) |
|
88
|
|
|
# Manage an internal dict between metric name and Gauge |
|
89
|
|
|
if metric_name not in self._metric_dict: |
|
90
|
|
|
self._metric_dict[metric_name] = Gauge(metric_name, "", labelnames=listkeys(labels)) |
|
91
|
|
|
# Write the value |
|
92
|
|
|
if hasattr(self._metric_dict[metric_name], 'labels'): |
|
93
|
|
|
# Add the labels (see issue #1255) |
|
94
|
|
|
self._metric_dict[metric_name].labels(**labels).set(value) |
|
95
|
|
|
else: |
|
96
|
|
|
self._metric_dict[metric_name].set(value) |
|
97
|
|
|
|
nicolargo /
glances
