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https://github.com/hipages/php-fpm_exporter

A prometheus exporter for PHP-FPM.
https://github.com/hipages/php-fpm_exporter

golang php-fpm prometheus prometheus-exporter

Last synced: about 2 months ago
JSON representation

A prometheus exporter for PHP-FPM.

Host: GitHub
URL: https://github.com/hipages/php-fpm_exporter
Owner: hipages
License: apache-2.0
Created: 2018-02-16T01:20:31.000Z (over 6 years ago)
Default Branch: master
Last Pushed: 2024-06-21T14:39:46.000Z (3 months ago)
Last Synced: 2024-06-22T07:13:42.333Z (3 months ago)
Topics: golang, php-fpm, prometheus, prometheus-exporter
Language: Go
Homepage:
Size: 656 KB
Stars: 574
Watchers: 12
Forks: 111
Open Issues: 52
Metadata Files:
- Readme: README.md
- Funding: .github/FUNDING.yml
- License: LICENSE
- Code of conduct: CODE_OF_CONDUCT.md

Awesome Lists containing this project

awesome-ops - hipages/php-fpm_exporter - 2.0|585|2018-02-16|2024-08-01 | 用于 PHP-FPM 指标的 Prometheus Exporter | (Prometheus-Exporter)

README

# php-fpm_exporter

![Test](https://github.com/hipages/php-fpm_exporter/workflows/Test/badge.svg)
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[![GoDoc](https://godoc.org/github.com/hipages/php-fpm_exporter?status.svg)](https://godoc.org/github.com/hipages/php-fpm_exporter)
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[![Docker Pulls](https://img.shields.io/docker/pulls/hipages/php-fpm_exporter.svg)](https://hub.docker.com/r/hipages/php-fpm_exporter/)
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[![Percentage of issues still open](http://isitmaintained.com/badge/open/hipages/php-fpm_exporter.svg)](http://isitmaintained.com/project/hipages/php-fpm_exporter "Percentage of issues still open")
[![Open Source Helpers](https://www.codetriage.com/hipages/php-fpm_exporter/badges/users.svg)](https://www.codetriage.com/hipages/php-fpm_exporter)
[![All Contributors](https://img.shields.io/badge/all_contributors-4-orange.svg?style=flat-square)](#contributors)

A [prometheus](https://prometheus.io/) exporter for PHP-FPM.
The exporter connects directly to PHP-FPM and exports the metrics via HTTP.

A webserver such as NGINX or Apache is **NOT** needed!

## Table of Contents

- [Features](#features)
- [Usage](#usage)
* [Options and defaults](#options-and-defaults)
* [Why `--phpfpm.fix-process-count`?](#why---phpfpmfix-process-count)
* [CLI Examples](#cli-examples)
* [Docker Examples](#docker-examples)
* [Kubernetes Example](#kubernetes-example)
- [Metrics collected](#metrics-collected)
- [Grafana Dasbhoard for Kubernetes](#grafana-dasbhoard-for-kubernetes)
- [FAQ](#faq)
- [Development](#development)
* [E2E Tests](#e2e-tests)
- [Contributing](#contributing)
- [Contributors](#contributors)
- [Alternatives](#alternatives)

## Features

* Export single or multiple pools
* Export to CLI as text or JSON
* Connects directly to PHP-FPM via TCP or Socket
* Maps environment variables to CLI options
* Fix for PHP-FPM metrics oddities
* [Grafana Dashboard](https://grafana.com/dashboards/4912) for Kubernetes

## Usage

`php-fpm_exporter` is released as [binary](https://github.com/hipages/php-fpm_exporter/releases) and [docker](https://hub.docker.com/r/hipages/php-fpm_exporter/) image.
It uses sensible defaults which usually avoids the need to use command parameters or environment variables.

`php-fpm_exporter` supports 2 commands, `get` and `server`.
The `get` command allows to retrieve information from PHP-FPM without running as a server and exposing an endpoint.
The `server` command runs the server required for prometheus to retrieve the statistics.

### Options and defaults

| Option | Description | Environment variable | Default value |
|------------------------|-------------------------------------------------------|------------------------------|-----------------|
| `--web.listen-address` | Address on which to expose metrics and web interface. | `PHP_FPM_WEB_LISTEN_ADDRESS` | [`:9253`](https://github.com/prometheus/prometheus/wiki/Default-port-allocations) |
| `--web.telemetry-path` | Path under which to expose metrics. | `PHP_FPM_WEB_TELEMETRY_PATH` | `/metrics` |
| `--phpfpm.scrape-uri` | FastCGI address, e.g. unix:///tmp/php.sock;/status or tcp://127.0.0.1:9000/status | `PHP_FPM_SCRAPE_URI` | `tcp://127.0.0.1:9000/status` |
| `--phpfpm.fix-process-count` | Enable to calculate process numbers via php-fpm_exporter since PHP-FPM sporadically reports wrong active/idle/total process numbers. | `PHP_FPM_FIX_PROCESS_COUNT`| `false` |
| `--log.level` | Only log messages with the given severity or above. Valid levels: [debug, info, warn, error, fatal] (default "error") | `PHP_FPM_LOG_LEVEL` | info |

### Why `--phpfpm.fix-process-count`?

`php-fpm_exporter` implements an option to "fix" the reported metrics based on the provided processes list by PHP-FPM.

We have seen PHP-FPM provide metrics (e.g. active processes) which don't match reality.
Specially `active processes` being larger than `max_children` and the actual number of running processes on the host.
Looking briefly at the source code of PHP-FPM it appears a scoreboard is being kept and the values are increased/decreased once an action is executed.
The metric `active processes` is also an accumulation of multiple states (e.g. Reading headers, Getting request information, Running).
Which shouldn't matter and `active processes` should still be equal or lower to `max_children`.

`--phpfpm.fix-process-count` will emulate PHP-FPMs implementation including the accumulation of multiple states.

If you like to have a more granular reporting please use `phpfpm_process_state`.

* https://bugs.php.net/bug.php?id=76003
* https://stackoverflow.com/questions/48961556/can-active-processes-be-larger-than-max-children-for-php-fpm

### CLI Examples

* Retrieve information from PHP-FPM running on `127.0.0.1:9000` with status endpoint being `/status`
```
php-fpm_exporter get
```

* Retrieve information from PHP-FPM running on `127.0.0.1:9000` and `127.0.0.1:9001`
```
php-fpm_exporter get --phpfpm.scrape-uri tcp://127.0.0.1:9000/status,tcp://127.0.0.1:9001/status
```

* Run as server with 2 pools:
```
php-fpm_exporter server --phpfpm.scrape-uri tcp://127.0.0.1:9000/status,tcp://127.0.0.1:9001/status
```

* Run as server and enable process count fix via environment variable:
```
PHP_FPM_FIX_PROCESS_COUNT=1 go run main.go server --web.listen-address ":12345" --log.level=debug
```

### Docker Examples

* Run docker manually
```
docker pull hipages/php-fpm_exporter
docker run -it --rm -e PHP_FPM_SCRAPE_URI="tcp://127.0.0.1:9000/status,tcp://127.0.0.1:9001/status" hipages/php-fpm_exporter
```

* Run the docker-compose example
```
git clone [email protected]:hipages/php-fpm_exporter.git
cd php-fpm_exporter/test
docker-compose -p php-fpm_exporter up
```
You can now access the following links:

* Prometheus: http://127.0.0.1:9090/
* php-fpm_exporter metrics: http://127.0.0.1:9253/metrics

[![asciicast](https://asciinema.org/a/1msR8nqAsFdHzROosUb7PiHvf.png)](https://asciinema.org/a/1msR8nqAsFdHzROosUb7PiHvf)

### Kubernetes Example

TBD

## Metrics collected

```
# HELP phpfpm_accepted_connections The number of requests accepted by the pool.
# TYPE phpfpm_accepted_connections counter
# HELP phpfpm_active_processes The number of active processes.
# TYPE phpfpm_active_processes gauge
# HELP phpfpm_idle_processes The number of idle processes.
# TYPE phpfpm_idle_processes gauge
# HELP phpfpm_listen_queue The number of requests in the queue of pending connections.
# TYPE phpfpm_listen_queue gauge
# HELP phpfpm_listen_queue_length The size of the socket queue of pending connections.
# TYPE phpfpm_listen_queue_length gauge
# HELP phpfpm_max_active_processes The maximum number of active processes since FPM has started.
# TYPE phpfpm_max_active_processes counter
# HELP phpfpm_max_children_reached The number of times, the process limit has been reached, when pm tries to start more children (works only for pm 'dynamic' and 'ondemand').
# TYPE phpfpm_max_children_reached counter
# HELP phpfpm_max_listen_queue The maximum number of requests in the queue of pending connections since FPM has started.
# TYPE phpfpm_max_listen_queue counter
# HELP phpfpm_process_last_request_cpu The %cpu the last request consumed.
# TYPE phpfpm_process_last_request_cpu gauge
# HELP phpfpm_process_last_request_memory The max amount of memory the last request consumed.
# TYPE phpfpm_process_last_request_memory gauge
# HELP phpfpm_process_request_duration The duration in microseconds of the requests.
# TYPE phpfpm_process_request_duration gauge
# HELP phpfpm_process_requests The number of requests the process has served.
# TYPE phpfpm_process_requests counter
# HELP phpfpm_process_state The state of the process (Idle, Running, ...).
# TYPE phpfpm_process_state gauge
# HELP phpfpm_scrape_failures The number of failures scraping from PHP-FPM.
# TYPE phpfpm_scrape_failures counter
# HELP phpfpm_slow_requests The number of requests that exceeded your 'request_slowlog_timeout' value.
# TYPE phpfpm_slow_requests counter
# HELP phpfpm_start_since The number of seconds since FPM has started.
# TYPE phpfpm_start_since counter
# HELP phpfpm_total_processes The number of idle + active processes.
# TYPE phpfpm_total_processes gauge
# HELP phpfpm_up Could PHP-FPM be reached?
# TYPE phpfpm_up gauge
```

## Grafana Dasbhoard for Kubernetes

The Grafana dashboard can be found [here](https://grafana.com/dashboards/4912).
There is also a more generic version [here](./grafana/kubernetes-php-fpm.json).

## FAQ

* **How to update "Metrics collected"?**

Copy&paste the output from:
```
curl http://127.0.0.1:12345/metrics | grep phpfpm | grep "#"
```

## Development

### E2E Tests

The E2E tests are based on docker-compose and bats-core. Install the required components, e.g. via brew on MacOS:

```bash
brew tap kaos/shell
brew install docker-compose bats-core kaos/shell/bats-assert kaos/shell/bats-support
```

After the components are installed run the E2E tests:

```bash
make test-e2e
```

## Contributing

Contributions are greatly appreciated.
The maintainers actively manage the issues list, and try to highlight issues suitable for newcomers.
The project follows the typical GitHub pull request model.
See " [How to Contribute to Open Source](https://opensource.guide/how-to-contribute/) " for more details.
Before starting any work, please either comment on an existing issue, or file a new one.

## Contributors

Thanks goes to these wonderful people ([emoji key](https://github.com/all-contributors/all-contributors#emoji-key)):

_{Enrico Stahn}
💬 💻 📖 🚧 ⚠️

_{Stanislav Antic}
💻

_herb
💻

_{Smoked Cheese}
🐛 💻

_Alexander
💻

_{Stan Xing}
💻

_itcsoft54
💻

_{John S Long}
🚇

_{Daniel O'Callaghan}
💻

_{Simon Stücher}
🐛

_{André Sterba}
💻

This project follows the [all-contributors](https://github.com/all-contributors/all-contributors) specification. Contributions of any kind welcome!

## Stargazers over time

[![Stargazers over time](https://starchart.cc/hipages/php-fpm_exporter.svg)](https://starchart.cc/hipages/php-fpm_exporter)

## Alternatives

* [bakins/php-fpm-exporter](https://github.com/bakins/php-fpm-exporter)
* [peakgames/php-fpm-prometheus](https://github.com/peakgames/php-fpm-prometheus)
* [craigmj/phpfpm_exporter](https://github.com/craigmj/phpfpm_exporter)