Bulletproof novncproxy setting

This patch implements setting correct IP address in case FQDNs have not been correctly set
and somebody is trying to deploy multihost OpenStack.

Change-Id: Ib24ea4f5cbcb6a44f5d9d8d0a699e163c3b65c25
Fixes: rhbz#1172241

packstack/plugins/prescript_000.py

@@ -698,7 +698,8 @@ def discover(config, messages):
     #       be used for that too).
     details = {}
     release_regexp = re.compile(r'^(?P<OS>.*) release (?P<release>[\d\.]*)')
-    for host in filtered_hosts(config):
+    config['HOST_LIST'] = list(filtered_hosts(config))
+    for host in config['HOST_LIST']:
         details.setdefault(host, {})
         server = utils.ScriptRunner(host)
         # discover OS and release

packstack/puppet/modules/packstack/Gemfile

@@ -0,0 +1,14 @@
+source 'https://rubygems.org'
+
+group :development, :test do
+  gem 'puppetlabs_spec_helper', :require => false
+  gem 'puppet-lint', '~> 0.3.2'
+  gem 'rake', '10.1.1'
+  gem 'rspec', '< 2.99'
+end
+
+if puppetversion = ENV['PUPPET_GEM_VERSION']
+  gem 'puppet', puppetversion, :require => false
+else
+  gem 'puppet', :require => false
+end

packstack/puppet/modules/packstack/Rakefile

@@ -0,0 +1,6 @@
+require 'puppetlabs_spec_helper/rake_tasks'
+require 'puppet-lint/tasks/puppet-lint'
+
+PuppetLint.configuration.fail_on_warnings = true
+PuppetLint.configuration.send('disable_80chars')
+PuppetLint.configuration.send('disable_class_parameter_defaults')

packstack/puppet/modules/packstack/lib/puppet/parser/functions/choose_my_ip.rb

@@ -0,0 +1,30 @@
+
+# Function returns host's IP selected from list of IPs
+module Puppet::Parser::Functions
+  newfunction(:choose_my_ip, :type => :rvalue) do |args|
+
+    if args.size < 1
+      raise(
+        Puppet::ParseError,
+        "choose_my_ip(): Wrong number of arguments given (#{args.size} for 1)"
+      )
+    end
+
+    host_list = args[0]
+    if not host_list.kind_of?(Array)
+      host_list = [host_list]
+    end
+    my_ips = lookupvar('interfaces').split(',').map do |interface|
+        interface.strip!
+        lookupvar("ipaddress_#{interface}")
+    end
+
+    result = nil
+    host_list.each do |ip|
+      if my_ips.include? ip
+        result = ip
+      end
+    end
+    result
+  end
+end

packstack/puppet/modules/packstack/spec/spec_helper.rb

@@ -0,0 +1,10 @@
+require 'puppetlabs_spec_helper/module_spec_helper'
+
+fixture_path = File.expand_path(File.join(__FILE__, '..', 'fixtures'))
+
+RSpec.configure do |c|
+  c.alias_it_should_behave_like_to :it_configures, 'configures'
+  c.alias_it_should_behave_like_to :it_raises, 'raises'
+  c.module_path = File.join(fixture_path, 'modules')
+  c.manifest_dir = File.join(fixture_path, 'manifests')
+end

packstack/puppet/modules/packstack/spec/unit/puppet/parser/functions/choose_my_ip_spec.rb

@@ -0,0 +1,36 @@
+
+require 'spec_helper'
+
+describe "choose_my_ip function" do
+
+  let :scope do
+    PuppetlabsSpec::PuppetInternals.scope
+  end
+
+  let :subject do
+    function_name = Puppet::Parser::Functions.function(:choose_my_ip)
+    scope.method(function_name)
+  end
+
+  context "basic unit tests" do
+    before :each do
+      scope.stubs(:lookupvar).with('interfaces').returns('eth0,eth1,lo')
+      scope.stubs(:lookupvar).with('ipaddress_eth1').returns('1.2.3.4')
+      scope.stubs(:lookupvar).with('ipaddress_eth0').returns('2.3.4.5')
+      scope.stubs(:lookupvar).with('ipaddress_lo').returns('127.0.0.1')
+    end
+
+    it 'should select correct ip' do
+       result = subject.call([['1.1.1.1', '2.3.4.5', '3.3.3.3']])
+       result.should(eq('2.3.4.5'))
+    end
+
+    it "should raise a ParseError if there is less than 1 arguments" do
+      lambda { scope.function_choose_my_ip([]) }.should(
+        raise_error(Puppet::ParseError)
+      )
+    end
+
+  end
+
+end

packstack/puppet/templates/nova_compute.pp

@@ -35,12 +35,11 @@ $vncproxy_proto = $config_horizon_ssl ? {
   default => 'http',
 }
 
-if ($::fqdn != '' and $::fqdn != 'localhost') {
-  $vncproxy_server = $::fqdn
+if ($::fqdn == '' or $::fqdn =~ /localhost/) {
+  # For cases where FQDNs have not been correctly set
+  $vncproxy_server = choose_my_ip(hiera('HOST_LIST'))
 } else {
-  # Multihost does not work without proper FQDN setup, so we use controller IP,
-  # because this case can come up only in usecase, which is all-in-one
-  $vncproxy_server = hiera('CONFIG_CONTROLLER_HOST')
+  $vncproxy_server = $::fqdn
 }
 
 class { 'nova::compute':