A docker image for Willy Tarreu's http terminator. See http://git.1wt.eu/web?p=httpterm.git;a=summary
By default, an instance is started on port 8000. If are you pushing serious traffic, you probably want --net=host
and should disable conntrack in iptables. Starting the docker daemon with --ip-masq=false --iptables=false should
be sufficient to do this -- if you understand the implications!
As httpterm is used in load testing scenarios, you may want to support a high number of connections. Recent versions
of docker use a far more restrictive ulimit -n, so you will probably see the following warning:
[WARNING] 061/144051 (7) : [httpterm.main()] Cannot raise FD limit to 300011.
[WARNING] 061/144051 (7) : [httpterm.main()] FD limit (1024) too low for maxconn=300000/maxsock=300011. Please raise 'ulimit-n' to 300011 or more to avoid any trouble.
Try running the container with --ulimit nofile=1000000 or some other high number to alleviate this.
If you are pinning interrupts, make sure httpterm runs on a dedicated CPU core. --cpuset-cpus 0 or whichever CPU is
free from these interrupts (si in top).
Any args passed to the container are args directly applied to httpterm process. The default is to start the container with -n 300000 -N 300000 -L :8000 which starts a server listening on port 8000 and caps the max connections per listener and the total global max to 300000.
An example of a more complicated run:
docker run -d --ulimit nofile=1000000 --cpuset-cpus 5 --name httpterm -it --net=host -v /tmp/httpterm.cfg:/tmp/httpterm.cfg aasmith/httpterm -f /tmp/httpterm.cfg -V
A list of parameters can be fetched from localhost:8000/?:
The following arguments are supported to override the default objects:
/?s=<size>[kmg] : return <size> bytes (may be kB, MB, GB). Eg: /?s=20k
/?r=<retcode> : present <retcode> as the HTTP return code. Eg: /?r=404
/?c=<cache> : set the return as not cacheable if zero. Eg: /?c=0
/?t=<time> : wait <time> milliseconds before responding. Eg: /?t=500
/?k={0|1} : Enable transfer encoding chunked with 1 byte chunks
/?S={0|1} : Disable/enable use of splice() to send data
/?R={0|1} : Disable/enable sending random data (disables splicing)
Note that those arguments may be cumulated on one line separated by the '&' sign :
GET /?s=20k&c=1&t=700 HTTP/1.0
GET /?r=500&s=0&c=0&t=1000 HTTP/1.0