update OpsWorks Layers' enable_auto_healing

switch_opsworks_auto_healing.rb

require 'aws-sdk'

TO=false

def main
  client = AWS::OpsWorks::Client.new(region: 'us-east-1')
  client.describe_stacks[:stacks].each do |s|
    puts "## #{s[:stack_id]}: #{s[:name]}"
    puts "##### [begin] at #{Time.now}"    
    client.describe_layers(stack_id: s[:stack_id])[:layers].each do |l|
      client.update_layer(layer_id: l[:layer_id], enable_auto_healing: TO)
      print "- #{l[:name]}(#{l[:layer_id]}): "
      puts  "#{l[:enable_auto_healing]} to #{TO}"
    end
    puts "##### [finished] at #{Time.now}"
  end
end
 
main