sidekiq_health.rb

require 'rubygems'
require 'bundler/setup'
require 'sidekiq'
require 'sidekiq/api'

Sidekiq.configure_server do |server|
  config.redis = {url: ENV["REDIS_URL"] || "redis://localhost:6379/12"}
end

workers = Sidekiq::ProcessSet.new.size
if workers == 0
  STDERR.puts "no workers"
  exit 1
end
puts "#{workers} active workers"