EC2 show instance tags

boxcast_origin_instance_info.rb

require 'rubygems'
require 'aws-sdk'

LAYER      = 'boxcast_origin'
STACK      = 'dev.boxcast.com'
TAG_PREFIX = 'boxcast:origin'

ec2 = AWS::EC2.new()

boxcast_origin_instances = []

ec2.instances.with_tag('opsworks:stack', STACK).tagged("opsworks:layer:#{LAYER}").each do |instance|
  tags = {}
  instance.tags.to_h.each do |k,v|
    tags[k] = v if k[/^#{TAG_PREFIX}/]
  end
  tags['id'] = instance.id
  tags['availability_zone'] = instance.availability_zone
  boxcast_origin_instances << tags
end

p boxcast_origin_instances