From b12129f0da219291e52b1725dae24528c882a55e Mon Sep 17 00:00:00 2001 From: Christopher Baines Date: Thu, 24 Dec 2015 10:59:02 +0000 Subject: Initial commit --- .gitignore | 11 + LICENSE | 661 ++++++++++++++++++++++++++++ debian/changelog | 5 + debian/compat | 1 + debian/control | 27 ++ debian/install | 1 + debian/rules | 12 + debian/source/format | 1 + prometheus-pgbouncer-exporter.service | 11 + prometheus_pgbouncer_exporter/__init__.py | 0 prometheus_pgbouncer_exporter/__main__.py | 3 + prometheus_pgbouncer_exporter/cli.py | 103 +++++ prometheus_pgbouncer_exporter/collectors.py | 210 +++++++++ prometheus_pgbouncer_exporter/exposition.py | 56 +++ prometheus_pgbouncer_exporter/utils.py | 50 +++ setup.py | 11 + 16 files changed, 1163 insertions(+) create mode 100644 .gitignore create mode 100644 LICENSE create mode 100644 debian/changelog create mode 100644 debian/compat create mode 100644 debian/control create mode 100644 debian/install create mode 100755 debian/rules create mode 100644 debian/source/format create mode 100644 prometheus-pgbouncer-exporter.service create mode 100644 prometheus_pgbouncer_exporter/__init__.py create mode 100644 prometheus_pgbouncer_exporter/__main__.py create mode 100644 prometheus_pgbouncer_exporter/cli.py create mode 100644 prometheus_pgbouncer_exporter/collectors.py create mode 100644 prometheus_pgbouncer_exporter/exposition.py create mode 100644 prometheus_pgbouncer_exporter/utils.py create mode 100644 setup.py diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..1ade7e4 --- /dev/null +++ b/.gitignore @@ -0,0 +1,11 @@ + +__pycache__ +*.pyc +*.egg-info + +.pybuild +debian/files +debian/prometheus-pgbouncer-exporter +*.log +*.debhelper +*.substvars diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..dba13ed --- /dev/null +++ b/LICENSE @@ -0,0 +1,661 @@ + GNU AFFERO GENERAL PUBLIC LICENSE + Version 3, 19 November 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU Affero General Public License is a free, copyleft license for +software and other kinds of works, specifically designed to ensure +cooperation with the community in the case of network server software. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. 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It is safest +to attach them to the start of each source file to most effectively +state the exclusion of warranty; and each file should have at least +the "copyright" line and a pointer to where the full notice is found. + + + Copyright (C) + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU Affero General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU Affero General Public License for more details. + + You should have received a copy of the GNU Affero General Public License + along with this program. If not, see . + +Also add information on how to contact you by electronic and paper mail. + + If your software can interact with users remotely through a computer +network, you should also make sure that it provides a way for users to +get its source. For example, if your program is a web application, its +interface could display a "Source" link that leads users to an archive +of the code. There are many ways you could offer source, and different +solutions will be better for different programs; see section 13 for the +specific requirements. + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU AGPL, see +. diff --git a/debian/changelog b/debian/changelog new file mode 100644 index 0000000..8e1bb86 --- /dev/null +++ b/debian/changelog @@ -0,0 +1,5 @@ +prometheus-pgbouncer-exporter (1.0) unstable; urgency=low + + * Initial release + + -- Christopher Baines Sun, 27 Dec 2015 14:57:54 +0000 diff --git a/debian/compat b/debian/compat new file mode 100644 index 0000000..ec63514 --- /dev/null +++ b/debian/compat @@ -0,0 +1 @@ +9 diff --git a/debian/control b/debian/control new file mode 100644 index 0000000..e41fa60 --- /dev/null +++ b/debian/control @@ -0,0 +1,27 @@ +Source: prometheus-pgbouncer-exporter +Section: net +Priority: optional +Maintainer: Christopher Baines +Build-Depends: debhelper (>= 9), + dh-systemd, + dh-python, + python3-all, + python3-setuptools, +Standards-Version: 3.9.6 +X-Python3-Version: >= 3.2 + +Package: prometheus-pgbouncer-exporter +Architecture: all +Depends: ${misc:Depends}, + ${python3:Depends}, + python3-configargparse, + python3-prometheus-client, + python3-psycopg2, + python3-pkg-resources, +Description: Export metrics from pgbouncer to Prometheus + This is a simple exporter for PgBouncer that makes several metrics available to + Prometheus. + . + Metrics are exported from the SHOW LISTS, STATS, POOLS and DATABASE comand + output. For the full list, see the prometheus_pgbouncer_exporter/collectors.py + file. diff --git a/debian/install b/debian/install new file mode 100644 index 0000000..819d3d9 --- /dev/null +++ b/debian/install @@ -0,0 +1 @@ +prometheus-pgbouncer-exporter.service lib/systemd/system/ diff --git a/debian/rules b/debian/rules new file mode 100755 index 0000000..b06eef5 --- /dev/null +++ b/debian/rules @@ -0,0 +1,12 @@ +#!/usr/bin/make -f + +export DH_VERBOSE=1 + +%: + dh $@ --with=python3,systemd --buildsystem=pybuild + +override_dh_systemd_enable: + dh_systemd_enable prometheus-pgbouncer-exporter.service + +override_dh_systemd_start: + dh_systemd_start --restart-after-upgrade prometheus-pgbouncer-exporter.service diff --git a/debian/source/format b/debian/source/format new file mode 100644 index 0000000..89ae9db --- /dev/null +++ b/debian/source/format @@ -0,0 +1 @@ +3.0 (native) diff --git a/prometheus-pgbouncer-exporter.service b/prometheus-pgbouncer-exporter.service new file mode 100644 index 0000000..e6269af --- /dev/null +++ b/prometheus-pgbouncer-exporter.service @@ -0,0 +1,11 @@ +[Unit] +Description=Expose data from pgbouncer for collection by Prometheus +Requires=pgbouncer.service +After=pgbouncer.service + +[Service] +User=postgres +ExecStart=/usr/bin/prometheus-pgbouncer-exporter + +[Install] +WantedBy=multi-user.target diff --git a/prometheus_pgbouncer_exporter/__init__.py b/prometheus_pgbouncer_exporter/__init__.py new file mode 100644 index 0000000..e69de29 diff --git a/prometheus_pgbouncer_exporter/__main__.py b/prometheus_pgbouncer_exporter/__main__.py new file mode 100644 index 0000000..4e28416 --- /dev/null +++ b/prometheus_pgbouncer_exporter/__main__.py @@ -0,0 +1,3 @@ +from .cli import main + +main() diff --git a/prometheus_pgbouncer_exporter/cli.py b/prometheus_pgbouncer_exporter/cli.py new file mode 100644 index 0000000..7284baa --- /dev/null +++ b/prometheus_pgbouncer_exporter/cli.py @@ -0,0 +1,103 @@ +#!/usr/bin/python3 + +# Copyright (C) 2015 Christopher Baines +# +# This program is free software: you can redistribute it and/or modify +# it under the terms of the GNU Affero General Public License as published by +# the Free Software Foundation, either version 3 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU Affero General Public License for more details. +# +# You should have received a copy of the GNU Affero General Public License +# along with this program. If not, see . + +import logging +from http.server import HTTPServer + +import configargparse +from prometheus_client.core import REGISTRY + +from .utils import get_connection +from .exposition import RequestHandler +from .collectors import StatsCollector, ListsCollector, PoolsCollector, \ + DatabasesCollector + + +def main(): + p = configargparse.ArgParser( + default_config_files=[ + '/etc/prometheus-pgbouncer-exporter/config', + ], + ) + + p.add( + '-c', + '--config', + is_config_file=True, + help='config file path', + ) + + p.add( + '--port', + default='6432', + help="Port to connect to pgbouncer", + env_var='PGBOUNCER_PORT', + ) + p.add( + '--user', + default='pgbouncer', + help="User to connect to pgbouncer with", + env_var='PGBOUNCER_USER', + ) + + p.add( + '--database', + action='append', + help="Databases to report metrics for, if this is not specified, all metrics will be reported", + env_var='PGBOUNCER_DATABASES', + ) + + options = p.parse_args() + + logging.basicConfig(level=logging.DEBUG) + + logging.info(p.format_values()) + + connection = get_connection(options.user, options.port) + + REGISTRY.register(StatsCollector( + connection=connection, + databases=options.database, + )) + + REGISTRY.register(PoolsCollector( + connection=connection, + databases=options.database, + )) + + REGISTRY.register(DatabasesCollector( + connection=connection, + databases=options.database, + )) + + REGISTRY.register(ListsCollector( + connection=connection, + )) + + host = '0.0.0.0' + port = 9127 + + httpd = HTTPServer((host, port), RequestHandler) + + logging.info("Listing on port %s:%d" % (host, port)) + + try: + httpd.serve_forever() + except KeyboardInterrupt: + pass + finally: + connection.close() diff --git a/prometheus_pgbouncer_exporter/collectors.py b/prometheus_pgbouncer_exporter/collectors.py new file mode 100644 index 0000000..75aef90 --- /dev/null +++ b/prometheus_pgbouncer_exporter/collectors.py @@ -0,0 +1,210 @@ +#!/usr/bin/python3 + +# This program is free software: you can redistribute it and/or modify +# it under the terms of the GNU Affero General Public License as published by +# the Free Software Foundation, either version 3 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU Affero General Public License for more details. +# +# You should have received a copy of the GNU Affero General Public License +# along with this program. If not, see . + +from prometheus_client.core import GaugeMetricFamily + +from .utils import get_data_by_named_column, get_data_by_named_row + + +class PgBouncerCollector(object): + def __init__(self, connection, namespace='pgbouncer'): + self.connection = connection + self.namespace = namespace + + +class NamedColumnCollector(PgBouncerCollector): + def get_labels_for_row(self, row): + raise NotImplementedError() + + def collect(self): + # Each of the metrics is recorded per database, by calling add_metric + # with the database as the label on the appropriate GaugeMetricFamily. + + # First, create the GaugeMetricFamily objects for each metric + gauges = { + key: GaugeMetricFamily( + name="%s_%s" % (self.namespace, name), + documentation="%s (%s)" % (documentation, key), + labels=self.labels, + ) + for key, (name, documentation) in self.metrics.items() + } + + rows = get_data_by_named_column(self.connection, self.query_parameter) + + # Each row coresponds to the metrics for a particular database + for row in rows: + database = row['database'] + + if self.databases is not None and database not in self.databases: + continue + + # Sort for deterministic ordering in the output + for key in sorted(self.metrics.keys()): + value = row[key] + label_values = self.get_labels_for_row(row) + + gauges[key].add_metric(label_values, value) + + for gauge in gauges.values(): + yield gauge + + +class ListsCollector(PgBouncerCollector): + metrics = { + 'databases': ( + 'database_count', + "Number of databases", + ), + 'users': ( + 'user_count', + "Number of users", + ), + 'pools': ( + 'pool_count', + "Number of pools", + ), + 'free_clients': ( + 'free_client_count', + "Number of free clients", + ), + 'used_clients': ( + 'used_client_count', + "Number of used clients", + ), + 'login_clients': ( + 'login_client_count', + "Number of clients in the login stats", + ), + 'free_servers': ( + 'free_server_count', + "Number of free servers", + ), + 'used_servers': ( + 'used_server_count', + "Number of used servers", + ), + 'dns_names': ( + 'dns_name_count', + "", + ), + 'dns_zones': ( + 'dns_zone_count', + "", + ), + 'dns_queries': ( + 'dns_querie_count', + "", + ), + 'dns_pending': ( + 'dns_pending_count', + "", + ), + } + + def collect(self): + data = get_data_by_named_row(self.connection, 'LISTS') + + for key, (name, documentation) in sorted( + self.metrics.items(), key=lambda x: x[0] + ): + yield GaugeMetricFamily( + name="%s_%s" % (self.namespace, name), + documentation="%s (%s)" % (documentation, key), + value=data[key], + ) + + +class StatsCollector(NamedColumnCollector): + query_parameter = 'STATS' + + labels = ['database'] + + metrics = { + 'total_requests': ( + 'requests_total', + "Total number of SQL requests pooled by pgbouncer", + ), + 'total_received': ( + 'received_bytes_total', + "Total volume in bytes of network traffic received by pgbouncer", + ), + 'total_sent': ( + 'sent_bytes_total', + "Total volume in bytes of network traffic sent by pgbouncer", + ), + 'total_query_time': ( + 'query_microseconds_total', + "Total number of microseconds spent by pgbouncer when actively connected to PostgreSQL", + ), + } + + def __init__(self, databases, *args, **kwargs): + super().__init__(*args, **kwargs) + + self.databases = databases + + def get_labels_for_row(self, row): + return [row['database']] + + +class PoolsCollector(NamedColumnCollector): + query_parameter = 'POOLS' + + labels = ['database', 'user'] + + metrics = { + 'cl_active': ( + 'active_client_count', + "Client connections that are linked to server connection and can process queries", + ), + 'cl_waiting': ( + 'waiting_client_count', + "Client connections have sent queries but have not yet got a server connection", + ), + } + + def __init__(self, databases, *args, **kwargs): + super().__init__(*args, **kwargs) + + self.databases = databases + + def get_labels_for_row(self, row): + return [row['database'], row['user']] + + +class DatabasesCollector(NamedColumnCollector): + query_parameter = 'DATABASES' + + labels = ['database'] + + metrics = { + 'pool_size': ( + 'pool_size', + "", + ), + 'reserve_pool': ( + 'reserve_pool_count', + "", + ), + } + + def __init__(self, databases, *args, **kwargs): + super().__init__(*args, **kwargs) + + self.databases = databases + + def get_labels_for_row(self, row): + return [row['database']] diff --git a/prometheus_pgbouncer_exporter/exposition.py b/prometheus_pgbouncer_exporter/exposition.py new file mode 100644 index 0000000..4396b73 --- /dev/null +++ b/prometheus_pgbouncer_exporter/exposition.py @@ -0,0 +1,56 @@ +#!/usr/bin/python3 + +# Copyright (C) 2015 Christopher Baines +# +# This program is free software: you can redistribute it and/or modify +# it under the terms of the GNU Affero General Public License as published by +# the Free Software Foundation, either version 3 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU Affero General Public License for more details. +# +# You should have received a copy of the GNU Affero General Public License +# along with this program. If not, see . + +from prometheus_client.exposition import MetricsHandler + +index_page = """ + + + + + + + Prometheus PgBouncer Exporter + + + +

PgBouncer exporter for Prometheus

+ +

+ This is a simple exporter for PgBouncer that makes several metrics + available to Prometheus. +

+ +

+ Metrics are exported from the SHOW LISTS, STATS, POOLS and DATABASE comand + output. +

+ + View metrics + + +""" + + +class RequestHandler(MetricsHandler): + def do_GET(self): + if self.path == "/metrics": + return super().do_GET() + else: + self.send_response(200) + self.end_headers() + self.wfile.write(index_page.encode('UTF-8')) diff --git a/prometheus_pgbouncer_exporter/utils.py b/prometheus_pgbouncer_exporter/utils.py new file mode 100644 index 0000000..6789290 --- /dev/null +++ b/prometheus_pgbouncer_exporter/utils.py @@ -0,0 +1,50 @@ +#!/usr/bin/python3 + +# This program is free software: you can redistribute it and/or modify +# it under the terms of the GNU Affero General Public License as published by +# the Free Software Foundation, either version 3 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU Affero General Public License for more details. +# +# You should have received a copy of the GNU Affero General Public License +# along with this program. If not, see . + +import psycopg2 + + +def get_connection(user, port): + connection = psycopg2.connect( + database='pgbouncer', + user=user, + port=port, + ) + + # pgbouncer does not support transactions (as it does not make sense to), + # so don't start a transaction when connecting + connection.set_session(autocommit=True) + + return connection + + +def get_data_by_named_column(connection, key): + with connection.cursor() as cursor: + cursor.execute('SHOW %s;' % key) + + rows = cursor.fetchall() + column_names = list(column.name for column in cursor.description) + + return [ + dict(zip(column_names, row)) + for row in rows + ] + + +def get_data_by_named_row(connection, key): + with connection.cursor() as cursor: + cursor.execute('SHOW %s;' % key) + + return dict(cursor.fetchall()) diff --git a/setup.py b/setup.py new file mode 100644 index 0000000..3035917 --- /dev/null +++ b/setup.py @@ -0,0 +1,11 @@ +from setuptools import setup, find_packages + +setup( + name="prometheus-pgbouncer-exporter", + packages=find_packages(), + entry_points={ + 'console_scripts': [ + 'prometheus-pgbouncer-exporter = prometheus_pgbouncer_exporter.cli:main', + ], + }, +) -- cgit v1.2.3