Merge pull request #15990 from jameswnl/rep-server-settings

Tool to replicate server settings to other servers

spec/tools/server_settings_replicator/server_settings_replicator_spec.rb

@@ -0,0 +1,31 @@
+$LOAD_PATH << Rails.root.join("tools")
+
+require "server_settings_replicator/server_settings_replicator"
+
+describe ServerSettingsReplicator do
+  let(:miq_server) { EvmSpecHelper.local_miq_server }
+  let!(:miq_server_remote) { EvmSpecHelper.remote_miq_server }
+  let(:settings) { {:k1 => {:k2 => {:k3 => 'v3'}}} }
+
+  describe "#replicate" do
+    it "targets only other servers" do
+      miq_server.add_settings_for_resource(settings)
+      expect(described_class).to receive(:copy_to).with([miq_server_remote], settings)
+      described_class.replicate(miq_server, 'k1/k2')
+    end
+  end
+
+  describe "#construct_setting_tree" do
+    it "handle simple value" do
+      path = [:k1, :k2]
+      values = 'abc'
+      expect(described_class.construct_setting_tree(path, values)).to eq(:k1 => {:k2 => 'abc'})
+    end
+
+    it "handle hash value" do
+      path = [:k1, :k2]
+      values = {:k3 => 'v3', :k4 => 'v4'}
+      expect(described_class.construct_setting_tree(path, values)).to eq(:k1 => {:k2 => {:k3 => 'v3', :k4 => 'v4'}})
+    end
+  end
+end

tools/replicate_server_settings.rb

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+#!/usr/bin/env ruby
+require File.expand_path("../config/environment", __dir__)
+$LOAD_PATH << Rails.root.join("tools")
+require 'trollop'
+require 'server_settings_replicator/server_settings_replicator'
+
+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]
+
+server = opts[:serverid] ? MiqServer.find(opts[:serverid]) : MiqServer.my_server
+ServerSettingsReplicator.replicate(server, opts[:path], opts[:dry_run])

tools/server_settings_replicator/server_settings_replicator.rb

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+class ServerSettingsReplicator
+  def self.replicate(server, path_string, dry_run = false)
+    path = path_string.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).to_h)
+
+    puts "Replicating from server id=#{server.id}, path=#{path_string} to #{target_servers.count} servers"
+    puts "Settings: #{settings}"
+
+    if dry_run
+      puts "Dry run, no updates have been made"
+    else
+      copy_to(target_servers, settings)
+    end
+    puts "Done"
+  end
+
+  def self.construct_setting_tree(path, values)
+    # construct the partial tree containing the target values
+    path.reverse.inject(values) { |merged, element| {element => merged} }
+  end
+
+  def self.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)
+    end
+  end
+end