test-logging.rb

#!/usr/bin/env ruby

require 'logger'

# rotatelogs required...
# http://httpd.apache.org/docs/2.2/programs/rotatelogs.html
logger = Logger.new("|rotatelogs ./foo.log.%Y-%m-%d-%H 3600", 0, 0)

10.times do 
  logger.error "testing..."
  sleep 1
end