consul_dynamic_inventory.rb

#!/usr/bin/env ruby

require 'net/http'
require 'uri'
require 'json'

output = {}
s_json = JSON.parse(Net::HTTP.get_response(URI.parse('http://localhost:8500/v1/catalog/services')).body)
services = s_json.keys.reject{|k| k == 'consul'}
services.each do |srv|
  res = Net::HTTP.get_response(URI.parse("http://localhost:8500/v1/catalog/service/#{srv}")).body
  json = JSON.parse(res)
  a = []
  json.each {|j| a << j['Address'] }
  output = output.merge({srv => a})
end

puts JSON.generate(output)