Ruby scripts to create a load balanced cluster on AWS.

gistfile1.rb

#!/usr/bin/env ruby

require 'aws-sdk'

@elb = Aws::ElasticLoadBalancing::Client.new(region: 'us-east-1')
@ec2 = Aws::EC2::Client.new(region: 'us-east-1')

def create_load_balancer
  response = @elb.create_load_balancer(
    load_balancer_name: "jboss-cluster-lb",
    listeners: [
      {
        protocol: "HTTP",
        load_balancer_port: "80",
        instance_protocol: "HTTP",
        instance_port: "8080"
      }
    ],
    subnets: ["subnet-df8225a8"],
    security_groups: ["sg-4463b820"],
  )
end

def create_ec2_instances(number_of_instances)
  response = @ec2.run_instances(
    image_id: 'ami-0a96d662',
    min_count: 1,
    max_count: number_of_instances,
    key_name: 'jprickett',
    security_group_ids: ['sg-4463b820', 'sg-724d9716'],
    instance_type: 'c4.large',
    placement: {
      availability_zone: 'us-east-1b',
      group_name: "Wildfly Servers"
    },
    subnet_id: 'subnet-df8225a8',
    monitoring: {
      enabled: true,
    }
  )
  
  response.instances
end


create_load_balancer()
instances = create_ec2_instances(3)
instance_ids = instances.map { |instance| { instance_id: instance.instance_id } }

@elb.register_instances_with_load_balancer(
  load_balancer_name: "jboss-cluster-lb",
  instances: instance_ids
)