Add support for dynamic modules.

Allow nginx to load dynamic modules by specifying an absolute or a
relative ("modules/") path. Modules must be installed separately and
before loading the puppet nginx module.

manifests/config.pp

@@ -24,6 +24,7 @@
   $daemon                         = $::nginx::daemon
   $daemon_user                    = $::nginx::daemon_user
   $daemon_group                   = $::nginx::daemon_group
+  $dynamic_modules                = $::nginx::dynamic_modules
   $global_owner                   = $::nginx::global_owner
   $global_group                   = $::nginx::global_group
   $global_mode                    = $::nginx::global_mode

manifests/init.pp

@@ -33,6 +33,7 @@
   Optional[Enum['on', 'off']] $daemon                        = undef,
   $daemon_user                                               = $::nginx::params::daemon_user,
   $daemon_group                                              = undef,
+  Optional[Array[String]] $dynamic_modules                   = [],
   $global_owner                                              = $::nginx::params::global_owner,
   $global_group                                              = $::nginx::params::global_group,
   $global_mode                                               = $::nginx::params::global_mode,

spec/classes/nginx_spec.rb

@@ -337,6 +337,12 @@
 
           describe 'nginx.conf template content' do
             [
+              {
+                title: 'should not set load_module',
+                attr: 'dynamic_modules',
+                value: :undef,
+                notmatch: %r{load_module}
+              },
               {
                 title: 'should not set user',
                 attr: 'super_user',
@@ -882,6 +888,26 @@
             end
           end
 
+          context 'when dynamic_modules is "[\'ngx_http_geoip_module\']" ' do
+            let(:params) do
+              {
+                dynamic_modules: ['ngx_http_geoip_module']
+              }
+            end
+
+            it { is_expected.to contain_file('/etc/nginx/nginx.conf').with_content(%r{load_module "modules/ngx_http_geoip_module.so";}) }
+          end
+
+          context 'when dynamic_modules is "[\'/path/to/module/ngx_http_geoip_module.so\']" ' do
+            let(:params) do
+              {
+                dynamic_modules: ['/path/to/module/ngx_http_geoip_module.so']
+              }
+            end
+
+            it { is_expected.to contain_file('/etc/nginx/nginx.conf').with_content(%r{load_module "/path/to/module/ngx_http_geoip_module.so";}) }
+          end
+
           context 'when proxy_cache_path is /path/to/proxy.cache and loader_files is 1000' do
             let(:params) do
               {

templates/conf.d/nginx.conf.erb

@@ -1,4 +1,11 @@
 # MANAGED BY PUPPET
+<% Array(@dynamic_modules).each do |mod_item| -%>
+  <%- if mod_item =~ /^\/.*/ -%>
+load_module "<%= mod_item -%>";
+  <%- else -%>
+load_module "modules/<%= mod_item -%>.so";
+  <%- end -%>
+<%- end -%>
 <% if @daemon -%>
 daemon <%= @daemon %>;
 <% end -%>