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
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.