Using AWS SSM Parameter Store to load configuration in Ruby

config.rb

require 'aws-sdk-ssm'
require_relative './neko-logger'

L = Neko::Logger.logger
SSMPS_KEY_PATH = '/config/path/'

def config
  # Skip if config was loaded within the last hour  
  if @config_loaded.nil? || (Time.now - @config_loaded > 3600)
    L.info('Loading config from SSMPS')
    @config = {}
    ssm = Aws::SSM::Client.new
    ps_path = {
      path: SSMPS_KEY_PATH,
      recursive: true,
      with_decryption: true,
    }
    ssm.get_parameters_by_path(ps_path).parameters.each do |prm|
      k = prm[:name][SSMPS_KEY_PATH.length..].gsub(/\//,'_').to_sym
      @config[k] = prm[:value]
    end
    @config_loaded = Time.now
    L.debug("Config loaded #{@config_loaded}")
  end
  @config
end