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Tiny Go webserver that prints os information and HTTP request to output



  • /data?size=n[&unit=u]: creates a response with a size n. The unit of measure, if specified, accepts the following values: KB, MB, GB, TB (optional, default: bytes).
  • /echo: webSocket echo.
  • /bench: always return the same response (1).
  • /[?wait=d]: returns the whoami information (request and network information). The optional wait query parameter can be provided to tell the server to wait before sending the response. The duration is expected in Go's time.Duration format (e.g. /?wait=100ms to wait 100 milliseconds).
  • /api: returns the whoami information as JSON.
  • /health: heath check
    • GET, HEAD, ...: returns a response with the status code defined by the POST
    • POST: changes the status code of the GET (HEAD, ...) response.


  • cert: give me a certificate.
  • key: give me a key.
  • port: give me a port number. (default: 80)
  • name: give me a name. (it can be also defined with WHOAMI_NAME environment variable)


$ docker run -d -P --name iamfoo traefik/whoami

$ docker inspect --format '{{ .NetworkSettings.Ports }}'  iamfoo
map[80/tcp:[{ 32769}]]

$ curl ""
Hostname :  6e0030e67d6a
IP :
IP :  ::1
IP :
IP :  fe80::42:acff:fe11:1b
GET / HTTP/1.1
User-Agent: curl/7.35.0
Accept: */*
# updates health check status
$ curl -X POST -d '500' http://localhost:80/health

# calls the health check
$ curl -v http://localhost:80/health
*   Trying ::1:80...
* Connected to localhost (::1) port 80 (#0)
> GET /health HTTP/1.1
> Host: localhost:80
> User-Agent: curl/7.65.3
> Accept: */*
* Mark bundle as not supporting multiuse
< HTTP/1.1 500 Internal Server Error
< Date: Mon, 16 Sep 2019 22:52:40 GMT
< Content-Length: 0
docker run -d -P -v ./certs:/certs --name iamfoo traefik/whoami --cert /certs/cert.cer --key /certs/key.key