how to assign an ip address to an ec2 instance using the v2 ruby sdk

Question

how to assign an ip address to an ec2 instance using the v2 ruby sdk after the instance has been created.

I tried the

ec2.associate_address()

method (mentioned in http://docs.aws.amazon.com/sdk-for-ruby/v2/developer-guide/ec2-using-elastic-ip-addresses.html ) but that seems to be a v1 method

Answer 1

This is the code in Ruby with aws Ruby SDK v1. I am fetching allocation id of the Elastic IP and passing it to associate_elastic_ip method of instance object.

require 'aws-sdk-v1'
require 'json'

temp_ec2 = AWS::EC2.new
instance = temp_ec2.instances["i-8392ld62828f0c97"]
elasticIp = AWS::EC2::ElasticIp.new("49.234.122.12")
if elasticIp.exists?
           begin
                  instance.associate_elastic_ip(elasticIp.allocation_id)
              puts "[Success]EIP has been associated successfully...."
           rescue Exception => e
                  puts "There is an exception in allocating elastic ip and the exception is..#{e}"
           end
else
           puts "[Failed]EIP doesn't exist in the account."
end