feat: Enhance config flexibility and setup

Introduced command-line flags for improved configuration management, including the creation of a default config file, and specified listening address override capabilities. This update facilitates easier and more flexible setup and deployment processes for the PostgreSQL connection exporter. The `.gitignore` and documentation were updated to align with these changes, reflecting the new command-line options and the removal of the `config.dist.yaml` in favor of creating a default configuration through the tool itself.

- Command-line flags `--create-config`, `--config`, `--host`, and `--port` added to streamline customization.
- Configuration now supports naming database hosts for clearer metrics identification.
- Documentation revised to guide through the new configuration and setup process.
- Changelog introduced to track project evolution.

These enhancements aim to make the exporter more adaptable to various deployment environments and to simplify the initial setup for users.

2024-05-16 06:33:21 +02:00

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PostgreSQL Connection Exporter for Prometheus

This is a simple server that exports PostgreSQL connection metrics in a format that can be scraped by Prometheus.

It outputs the following metrics:

The number of connections per database
The number of connections per user
The number of connections per client address
The number of connections per state

Installation

You can install the exporter from PyPI. Within a virtual environment, run:

pip install postgres-connection-exporter

Configuration

The exporter is configured using a config.yaml. You can create a default configuration file in the current working directory with:

postgres-connection-exporter --create-config

Now, edit the config.yaml file to match your PostgreSQL connection settings. Here is an example configuration:

hosts:
  host: localhost
  port: 5432
  user: postgres
  password: postgres

The user must have the pg_monitor role to access the pg_stat_activity view.

Usage

After you have created your config.yaml, you can start the exporter with:

postgres-connection-exporter

By default, the exporter listens on localhost:8989. You can change the address in the config.yaml file, or using the --host and --port flags:

postgres-connection-exporter --host 0.0.0.0 --port 9898

You can also specify a different configuration file with the --config flag:

postgres-connection-exporter --config /path/to/config.yaml

License

This project is licensed under the MIT License. See the LICENSE file for details.