This project can help you understand wrk's scripting capabilities.
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environments
README.md
docker-compose.yml

README.md

WRK Debugging Environment

This project can help you understand wrk's scripting capabilities.

It consists of:

  • the application container
  • the wrk container used for debugging

The application uses Express framework and is based on the Node.js platform. It is very simple. It returns an 200 status code for all requests and logs each request details into the console.

A sample request:

curl -i -XPOST http://app:3000/test?test=true -d 'test'

Would return:

HTTP/1.1 200 OK
X-Powered-By: Express
X-Debug: true
Content-Type: text/html; charset=utf-8
Content-Length: 2
ETag: W/"2-79dcdd47"
Date: Mon, 11 May 2015 00:18:58 GMT
Connection: keep-alive

Additionally the application would log:

--- --- --- --- --- --- --- --- --- --- --- --- ---

[2015-05-11 00:18:58] Request 2983

POST/1.1 /test?test=true on :::3000

Headers:
 - user-agent: curl/7.38.0
 - host: app:3000
 - accept: */*
 - content-length: 4
 - content-type: application/x-www-form-urlencoded

No cookies

Body:
test

Requirements:

Setup

To start the environment use this command:

docker-compose run --rm wrk bash

It will spin up the application container and a container with wrk.

Now inside the wrk container use the following command to benchmark the application:

wrk -c3 -d1s -t2 -s /scripts/debug.lua http://app:3000 -- debug true

Use the debug.lua file to print debugging messages.

Leave the wrk container with exit.