Tool to replicate server settings to other servers

https://www.pivotaltracker.com/n/projects/1644071/stories/149319063

tools/replicate_server_settings.rb

@@ -0,0 +1,49 @@
+#!/usr/bin/env ruby
+require File.expand_path("../config/environment", __dir__)
+require 'trollop'
+
+opts = Trollop.options(ARGV) do
+  banner "USAGE:   #{__FILE__} -s <server id> -p <path/to/the/settings> \n" \
+         "Example: #{__FILE__} -d -s 1 -p ems/ems_amazon/additional_instance_types"
+
+  opt :dry_run,  "Dry Run",                                                :short => "d"
+  opt :serverid, "Replicating source server Id (default: current server)", :short => "s"
+  opt :path,     "Replicating source path within advanced settings hash",  :short => "p", :default => ""
+end
+
+puts opts.inspect
+Trollop.die :path, "is required" unless opts[:path_given]
+
+def replicate(opts)
+  server = opts[:serverid] ? MiqServer.find(opts[:serverid]) : MiqServer.my_server
+  path = opts[:path].split("/").map(&:to_sym)
+
+  # all servers except source
+  target_servers = MiqServer.where.not(:id => server.id)
+  settings = construct_setting_tree(path, server.settings_for_resource.fetch_path(path))
+
+  puts "Replicating from server id=#{server.id}, path=#{opts[:path]} to #{target_servers.count} servers"
+  puts "Settings: #{settings}"
+
+  if opts[:dry_run]
+    puts "Dry run, no updates have been made"
+  else
+    copy_to(target_servers, settings)
+  end
+  puts "Done"
+end
+
+def construct_setting_tree(path, values)
+  # construct the partial tree containing the target values
+  path.reverse.inject(values) { |m, e| {e => m} }
+end
+
+def copy_to(target_servers, target_settings)
+  target_servers.each do |target|
+    puts " - replicating to server id=#{target.id}..."
+    target.add_settings_for_resource(target_settings)
+    target.save!
+  end
+end
+
+replicate(opts)