A CoreOS / Docker version of commander is now available at pete0emerson/docker-commander
This set of scripts uses Redis as its storage engine and in particular uses Redis's blocking pop off of lists to avoid polling the database for command status. It also uses zeromq for all interprocess transportation.
AppNexus Tech Talk video: http://www.youtube.com/watch?v=Z-4EqEZbfBM
Diagram about how the data flows: http://www.asciiflow.com/#868081871833843538
Install zeromq from source: http://www.zeromq.org/intro:get-the-software
Install redis from source: http://redis.io/download
Fire up:
./transmitter.py &
./processor.py &
./receiver.py &Run the commander:
./commander.py --host=localhost --receiver=tcp://localhost:9999 --command=date$ ./commander.py --help
usage: commander.py [-h] --host HOST --receiver RECEIVER [--verbose]
(--command COMMAND | --code CODE)
Execute a command asynchronously on multiple hosts
optional arguments:
-h, --help show this help message and exit
--host HOST The target host(s) (multiple --host flags may be
specified)
--receiver RECEIVER The receiver to send results to
--verbose Turn on verbose mode
--command COMMAND The command to be run
--code CODE File to be injected and runYou can even inject and run code:
$ ./commander.py --host=localhost --receiver=tcp://localhost:9999 --code=./inject.py
localhost => Darwin