Script to kill resque processes running > 1 day

resque_zombie_killer.rb

#!/usr/bin/env ruby

# Kills resque workers that are there for longer than 24 hours

processes = `ps ax -o pid,cmd`.split("\n")

processes_by_pid = processes.inject({}) do |hash, line|
  pid, cmd = line.split(" resque-1.25.2: ")

  hash unless pid && cmd

  hash.update(pid.strip => cmd)
end

def in_past?(cmd, regexp)
  _, time = regexp.match(cmd).to_a

  time && Time.at(time.to_i).utc < Time.now.utc - 24 * 60 * 60
end

processes_to_kill = processes_by_pid.each_with_object([]) do |(pid, cmd), result|
  if in_past?(cmd, /Forked \d+ at (\d+)/) || in_past?(cmd, /Processing \w+ since (\d+)/)
    result << pid
  end
end

`kill -9 #{processes_to_kill.join(' ')}`