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https://github.com/chuan-yun/Molten

php probe for zipkin and opentracing
https://github.com/chuan-yun/Molten

apm instrumentation lucency opentracing php probe trace tracing transparent zipkin

Last synced: about 2 months ago
JSON representation

php probe for zipkin and opentracing

Host: GitHub
URL: https://github.com/chuan-yun/Molten
Owner: chuan-yun
License: apache-2.0
Created: 2017-07-04T01:26:11.000Z (over 7 years ago)
Default Branch: master
Last Pushed: 2021-05-27T09:11:49.000Z (over 3 years ago)
Last Synced: 2024-08-03T20:06:29.827Z (5 months ago)
Topics: apm, instrumentation, lucency, opentracing, php, probe, trace, tracing, transparent, zipkin
Language: C
Homepage:
Size: 281 KB
Stars: 793
Watchers: 45
Forks: 160
Open Issues: 56
Metadata Files:
- Readme: README.md
- Changelog: CHANGES.md
- License: LICENSE

Awesome Lists containing this project

awesome-php-extensions - Molten - zipkin 集成 (代码分析)

README

# molten

> Readme in [Chinese 中文](https://github.com/chuan-yun/Molten/blob/master/README_ZH.md)

[![Build Status](https://travis-ci.org/chuan-yun/Molten.svg?branch=master)](https://travis-ci.org/chuan-yun/Molten)

molten is transparency tool for application tracing it self module call.

It trace php app core call and output zipkin/opentracing format trace log.

Provides features about muliti trace sapi, multi sampling type, upload tracing
status, module control and muliti sink type.

It very easy to build a [distributed systems tracing infrastructure](https://research.google.com/pubs/pub36356.html)
base on php, already run on thousand instance on production env.

# Table of contents
----
1. [Installing](#install)
2. [QuickStart](#quickstart)
3. [Configure](#configure)
4. [Function](#function)
5. [Verify](#verify)
6. [Features](#features)
7. [Contributing](#contributing)
8. [License](#license)

# Installing

Everything you should need to install molten on your system.

~~~
phpize
./configure
make && make install
~~~

`make install` copies `molten.so` to and appropriate location, but you still need to enable the module int the PHP config file, To do so, either edit your php.ini or add ad molten.ini file in `/etc/php5/conf.d` with the following contents:`extension=molten.so`.

at `./configure` phase, you can also add `--enable-zipkin-header=yes` to support zipkin B3 header.

if you want molten support `POST` method , at the compile phase you should check `libcurl-devel` is installed.

# QuickStart

~~~
cd example
sh run.sh
~~~
open `http://127.0.0.1:9411/zipkin/` in your browser, you can see the tracing detail in it.

if you think above is too simple, you also can do this.

~~~
cd example
sh complex.sh
~~~
it is cool, alright?

`NOTICE` if you not see the trace, you select EndTime +1 hour.

# Configure
## Base Config

`molten.enable` set 1 enable or set 0 disable, default `1`.

`molten.service_name` is to set service name for label app service name. now we support add `ini_set('molten.service_name', 'YOUR_PROJECT_NAME'); ` to code to trace different projects using same php enveroment.

`molten.tracing_cli` set `1` to trace, cli sapi, `0` not trace, just use for trace unit test, default `0`.

`molten.open_report` set `1` to open report php error, default `0`.

## Sampling Config

`molten.sampling_type` sampling type choose to use sampling by rate(`1`) or request(`2`), default is `1`.

`molten.sampling_request` sampling by request, set to per min request num, defualt is `1000`.

`molten.sampling_rate` determine a request sampled or not by rate, default is `64`.

## Control Config

`molten.notify_uri` the uri for molten to notify manger.

## Report Config

report module output type is same as sink module

`molten.report_interval` reporter call interval, default `60`.

`molten.report_limit` reporter list limit current only for error num, default `100`.

## Sink Config

`molten.sink_type` sink type, `1` write log, log path is depend on `molten.sink_log_path`, `2` write log to standand output, `3` write log to syslog, `4` use curl to send trace log, http uri depend on `molten.sink_http_uri`.

`molten.output_type` output spans on one line(`1`) or one line one span(`2`).

`molten.sink_log_path` locate log path.

`molten.sink_http_uri` locate log http uri.

`molten.sink_syslog_unix_socket` transform log to syslog udp unix domain collector.

## Spans Config

`molten.span_format` span format, you can select `zipkin` or `zipkin_v2` or `opentracing` for different tracing system.

# Function

`molten_span_format()` get current span format, return zipkin or opentraceing (string).

`molten_get_traceid()` get current context traceid, return hex string.

`molten_set_traceid($trace_id)` set current context traceid, return void.

# Verify

```shell
php -d extension=molten.so -d molten.enable=1 -d molten.sink_type=2 -d molten.tracing_cli=1 -d molten.sampling_rate=1 -r '$c=curl_init("http://localhost:12345");curl_exec($c);'
```
You can see output below:

```
[{"traceId":"%s","name":"php_curl","version":"php-4","id":"1.1","parentId":"1","timestamp":%d,"duration":%d,"annotations":[{"value":"cs","timestamp":%d,"endpoint":{"serviceName":"%s","ipv4":"%s"}},{"value":"cr","timestamp":%d,"endpoint":{"serviceName":"%s","ipv4":"%s"}}],"binaryAnnotations":[{"key":"http.url","value":"http:\/\/localhost:12345\/","endpoint":{"serviceName":"%s","ipv4":"%s"}},{"key":"error","value":"Failed
connect to localhost:12345; Connection
refused","endpoint":{"serviceName":"%s","ipv4":"%s"}}]},{"traceId":"%s","name":"cli","version":"php-4","id":"1","timestamp":%d,"duration":%d,"annotations":[{"value":"sr","timestamp":%d,"endpoint":{"serviceName":"%s","ipv4":"%s"}},{"value":"ss","timestamp":%d,"endpoint":{"serviceName":"%s","ipv4":"%s"}}],"binaryAnnotations":[{"key":"path","value":"-","endpoint":{"serviceName":"%s","ipv4":"%s"}}]}]
```

# Features

the Config Block above, you can see which feature we support.

## Interceptor

we intercept curl,pdo,mysqli,redis,mongodb,memcached extension to build execute time span info. for chain http request, we replace curl_exec,curl_setopt,curl_setopt_array to add http request trace header (x-w-traceid, x-w-spanid and so on).

the span_format is the way to custom span format, for two popular kinds (`zipkin` and `opentracing`).

## Sampling

different sampling type and change parameter to control sampling, rate or request.

## Sink

Sink is the output where you locate, molten support to standard fd, file, http and others (continue), on this way, we can choose where to output trace log.

## Control

Use http to control our sampling.

see molten status, request `http://domain/molten/status` use GET method.

the output is below, already adapt the style of [prometheus](https://prometheus.io).

```
# HELP molten_request_all Number of all request.
# TYPE molten_request_all counter
molten_request_all %d
# HELP molten_request_capture Number of request be capture.
# TYPE molten_request_capture counter
molten_request_capture %d
# HELP molten_sampling_type the type of sampling.
# TYPE molten_sampling_type gauge
molten_sampling_type %d
# HELP molten_sampling_rate the rate of sampling.
# TYPE molten_sampling_rate gauge
molten_sampling_rate %d
# HELP molten_sampling_request the request be capture one min.
# TYPE molten_sampling_request gauge
molten_sampling_request %d
```
modify molten sampling, request `http://domain/molten/status` use POST method,

body is json format, field has the same meaning of config.

```
{"enable":1,"samplingType":2,"samplingRate":20,"samplingRequest":100}

```

## Report

Report base import info which we do not sampled like error list.

# Contributing

Welcome developers who willing to make it better.

the mail list below you can contract for discuss and improve more power.

[email protected]

You may contribute in the following ways:

* [Repost issues and feedback](https://github.com/chuan-yun/Molten/issues).
* Submit fixes, features via Pull Request.

# License

Apache License Version 2.0 see http://www.apache.org/licenses/LICENSE-2.0.html