modify_EC2_InstanceType

modify_ec2_instancetype.rb

# -*- coding: utf-8 -*-
#
# http://buta9999.hatenablog.jp/entry/2014/01/30/010351を参考に作成
require 'aws-sdk'
require 'yaml'
require 'pp'
require "optparse"

opts = OptionParser.new

ec2_instance_id = nil
ec2_type = nil

opts.on("-i","--instance_id INSTANCE_ID") do |instance_id|
  ec2_instance_id = instance_id
end
opts.on("-t","--type INSTANCE_TYPE") do |type|
  ec2_type = type
end
opts.parse!(ARGV)
instance_types=%w{ m3.medium m3.large m3.xlarge m3.2xlarge 
                   m1.small m1.medium m1.large m1.xlarge
                   c3.large c3.xlarge c3.2xlarge c3.4xlarge c3.8xlarge
                   c1.medium c1.xlarge cc2.8xlarge g2.2xlarge cg1.4xlarge
                   m2.xlarge m2.2xlarge m2.4xlarge cr1.8xlarge
                   i2.xlarge i2.2xlarge i2.4xlarge i2.8xlarge hs1.8xlarge
                   hi1.4xlarge t1.micro 
               }
#pp instance_types
#pp ec2_instance_id
#pp ec2_type
raise "Option instance_id Required!" if (ec2_instance_id == nil)
raise "Option instance_type Required!" if (ec2_type == nil)

if !instance_types.include?(ec2_type)
  pp "Unknown Instance Type"
  exit 1
end

config=YAML.load(File.read("config.yml"))
AWS.config(config)
ec2_region = "ec2.ap-northeast-1.amazonaws.com"
ec2 = AWS::EC2.new(
  :ec2_endpoint => ec2_region
)

instance = ec2.instances["#{ec2_instance_id}"]
if !instance.exists?
  pp "Instance NotFound!!"
  exit 1
end

if instance.instance_type == ec2_type
  exit 0
end

eip = instance.ip_address
pp "EIP:#{eip}"
pp "start"
if instance.status == :running
pp "stopping..."
  instance.stop
  while instance.status != :stopped
    sleep(2)
  end
end
if instance.status == :stopped
pp "modify instance"
  ec2.client.modify_instance_attribute(:instance_id => "#{ec2_instance_id}",
                                       :attribute => "instanceType",
                                       :value => "#{ec2_type}")
  instance.start
  while instance.status != :running
    sleep(2)
  end
end

exit 0