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Example code of zlodes/prometheus-client

Informations about the package prometheus-client

PHP Prometheus Client

codecov

This package provides you an ability to collect and export Prometheus metrics from any modern PHP application.

Why?

Adapters

Installation

Flow

TL;DR: Read Simple example.

1. Preparation

  1. Set up a storage to store metrics. There are four interfaces can be implemented:
    1. CounterStorage
    2. GaugeStorage
    3. HistogramStorage
    4. SummaryStorage
  2. Set up a ArrayRegistry is a default implementation.
  3. Register your metrics using the Registry from step 2.

2. Collecting

  1. Get a collector for your metric from a CollectorFactory
  2. Call metric update method (e.g. increment on CounterCollector)

3. Exporting

  1. Create a controller to export metrics. Your controller should use FetcherExporter is a default implementation.
  2. Set up a Prometheus to scrape metrics from your application using the controller from step 1.

Simple example

Output example:

Testing

Run tests

Creating your own Storage

Keys serialization

There is a Serializer interface (with JSON-based implementation) to simplify work with a key-value storage.

Example can be found in InMemoryStorage.

Storage Testing

There are four useful traits to simplify your storage testing:

  1. CounterStorageTesting
  2. GaugeStorageTesting
  3. HistogramStorageTesting
  4. SummaryStorageTesting

They provide you a set of tests to check your storage implementation to be compatible with the library.

Example:

All versions of prometheus-client with dependencies

PHP Build Version
Package Version
Requires php Version ^8.1
psr/log Version ^1.0 || ^2.0 || ^3.0
webmozart/assert Version ^1.11
Composer command for our command line client (download client) This client runs in each environment. You don't need a specific PHP version etc. The first 20 API calls are free. Standard composer command

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