Havoc

A ChaosMonkey style application that can randomly kill processes, as well as TCP and UDP connections. Inspired by dLuna/chaos_monkey.

Basic Usage

havoc:on().

This will use the default options. The following is a list of currently allowed options

• avg_wait - The average amount of time you would like to wait between kills. (default 5000)
• deviation - The deviation of time allowed between kills. (default 0.3)
• supervisor - Whether or not to kill supervisors. (default false)
• process - Whether or not to kill processes. (default true)
• tcp - Whether or not to kill TCP connections. (default false)
• udp - Whether or not to kill UDP connections. (default false)
• nodes - Either a list of atoms for node names, or any value that erlang:nodes/1 accepts. (default this)
• applications - A list of application names that you want to target. (defaults to all applications except kernel and havoc)
• otp_applications - A list of OTP applications that you would like to target. (default [])
• supervisors - A list of supervisors that you want to target. Can be any valid supervisor reference. (defaults to all supervisors)
• killable_callback - A Fun that gets called to decide if a pid or port may be killed or not by returning true or false.
• prekill_callback - A Fun that gets called just before killing.

You can specify options using havoc:on/1.

havoc:on([{avg_wait, 3000}, {deviation, 0.5}, process, tcp])

It is also possible to check if havoc is currently active.

havoc:is_active()

Build

$ rebar3 compile