Improve logic for ipv6 listening

Centralizes template logic and reduces requirement on ipaddres6 fact presence.

manifests/resource/server.pp

@@ -281,7 +281,7 @@
 
   # Add IPv6 Logic Check - Nginx service will not start if ipv6 is enabled
   # and support does not exist for it in the kernel.
-  if $ipv6_enable and !$::ipaddress6 {
+  if $ipv6_enable and !$ipv6_listen_ip {
     warning('nginx: IPv6 support is not enabled or configured properly')
   }
 

templates/server/server_header.erb

@@ -18,17 +18,7 @@ server {
   listen unix:<%= @listen_unix_socket %><% if @listen_unix_socket_options %> <%= @listen_unix_socket_options %><% end %>;
     <%- end -%>
   <%- end -%>
-<%# check to see if ipv6 support exists in the kernel before applying -%>
-<%# FIXME this logic is duplicated all over the place -%>
-  <%- if @ipv6_enable && (defined? @ipaddress6) -%>
-    <%- if @ipv6_listen_ip.is_a?(Array) then -%>
-      <%- @ipv6_listen_ip.each do |ipv6| -%>
-  listen [<%= ipv6 %>]:<%= @ipv6_listen_port %> <% if @ipv6_listen_options %><%= @ipv6_listen_options %><% end %>;
-      <%- end -%>
-    <%- else -%>
-  listen [<%= @ipv6_listen_ip %>]:<%= @ipv6_listen_port %> <% if @ipv6_listen_options %><%= @ipv6_listen_options %><% end %>;
-    <%- end -%>
-  <%- end -%>
+<%= scope.function_template(["nginx/server/server_ipv6_listen.erb"]) %>
   server_name  www.<%= s.gsub(/^www\./, '') %>;
   <%- if @ssl_redirect or @ssl_only -%>
   return       301 https://<%= s.gsub(/^www\./, '') %><% if @_ssl_redirect_port.to_i != 443 %>:<%= @_ssl_redirect_port %><% end %>$request_uri;
@@ -56,16 +46,7 @@ server {
   listen unix:<%= @listen_unix_socket %><% if @listen_unix_socket_options %> <%= @listen_unix_socket_options %><% end %>;
   <%- end -%>
 <%- end -%>
-<%# check to see if ipv6 support exists in the kernel before applying -%>
-<%- if @ipv6_enable && (defined? @ipaddress6) -%>
-  <%- if @ipv6_listen_ip.is_a?(Array) then -%>
-    <%- @ipv6_listen_ip.each do |ipv6| -%>
-  listen [<%= ipv6 %>]:<%= @ipv6_listen_port %> <% if @ipv6_listen_options %><%= @ipv6_listen_options %><% end %>;
-    <%- end -%>
-  <%- else -%>
-  listen [<%= @ipv6_listen_ip %>]:<%= @ipv6_listen_port %> <% if @ipv6_listen_options %><%= @ipv6_listen_options %><% end %>;
-  <%- end -%>
-<%- end -%>
+<%= scope.function_template(["nginx/server/server_ipv6_listen.erb"]) %>
   server_name           <%= @rewrite_www_to_non_www ? @server_name.join("  ").gsub(/(^| )(www\.)?(?=[a-z0-9])/, '') : @server_name.join(" ") %>;
 <%- if instance_variables.any? { |iv| iv.to_s.include? 'auth_basic' } -%>
   <%- if defined? @auth_basic -%>

templates/server/server_ipv6_listen.erb

@@ -0,0 +1,10 @@
+<%# check to see if ipv6 support exists in the kernel before applying -%>
+  <%- if @ipv6_enable -%>
+    <%- if @ipv6_listen_ip.is_a?(Array) then -%>
+      <%- @ipv6_listen_ip.each do |ipv6| -%>
+  listen [<%= ipv6 %>]:<%= @ipv6_listen_port %> <% if @ipv6_listen_options %><%= @ipv6_listen_options %><% end %>;
+      <%- end -%>
+    <%- else -%>
+  listen [<%= @ipv6_listen_ip %>]:<%= @ipv6_listen_port %> <% if @ipv6_listen_options %><%= @ipv6_listen_options %><% end %>;
+    <%- end -%>
+  <%- end -%>

templates/server/server_ssl_header.erb

@@ -9,17 +9,7 @@ server {
   <%- else -%>
   listen       <%= @listen_ip %>:<%= @ssl_port %> <% if @ssl_listen_option %>ssl<% end %><% if @http2 == 'on' %> http2<% end %><% if @spdy == 'on' %> spdy<% end %><% if @listen_options %> <%= @listen_options %><% end %>;
   <%- end -%>
-<%# check to see if ipv6 support exists in the kernel before applying -%>
-<%# FIXME this logic is duplicated all over the place -%>
-  <%- if @ipv6_enable && (defined? @ipaddress6) -%>
-    <%- if @ipv6_listen_ip.is_a?(Array) then -%>
-      <%- @ipv6_listen_ip.each do |ipv6| -%>
-  listen [<%= ipv6 %>]:<%= @ssl_port %> ssl<% if @http2 == 'on' %> http2<% end %><% if @spdy == 'on' %> spdy<% end %><% if @ipv6_listen_options %> <%= @ipv6_listen_options %><% end %>;
-      <%- end -%>
-    <%- else -%>
-  listen       [<%= @ipv6_listen_ip %>]:<%= @ssl_port %> ssl<% if @http2 == 'on' %> http2<% end %><% if @spdy == 'on' %> spdy<% end %><% if @ipv6_listen_options %> <%= @ipv6_listen_options %><% end %>;
-    <%- end -%>
-  <%- end -%>
+<%= scope.function_template(["nginx/server/server_ssl_ipv6_listen.erb"]) %>
   server_name  www.<%= s.gsub(/^www\./, '') %>;
   return       301 https://<%= s.gsub(/^www\./, '') %>$request_uri;
 
@@ -37,16 +27,7 @@ server {
   <%- else -%>
   listen       <%= @listen_ip %>:<%= @ssl_port %> <% if @ssl_listen_option %>ssl<% end %><% if @http2 == 'on' %> http2<% end %><% if @spdy == 'on' %> spdy<% end %><% if @listen_options %> <%= @listen_options %><% end %>;
   <%- end -%>
-<%# check to see if ipv6 support exists in the kernel before applying -%>
-  <%- if @ipv6_enable && (defined? @ipaddress6) -%>
-    <%- if @ipv6_listen_ip.is_a?(Array) then -%>
-      <%- @ipv6_listen_ip.each do |ipv6| -%>
-  listen       [<%= ipv6 %>]:<%= @ssl_port %> ssl<% if @http2 == 'on' %> http2<% end %><% if @spdy == 'on' %> spdy<% end %><% if @ipv6_listen_options %> <%= @ipv6_listen_options %><% end %>;
-      <%- end -%>
-    <%- else -%>
-  listen       [<%= @ipv6_listen_ip %>]:<%= @ssl_port %> ssl<% if @http2 == 'on' %> http2<% end %><% if @spdy == 'on' %> spdy<% end %><% if @ipv6_listen_options %> <%= @ipv6_listen_options %><% end %>;
-    <%- end -%>
-  <%- end -%>
+<%= scope.function_template(["nginx/server/server_ssl_ipv6_listen.erb"]) %>
   server_name  <%= @rewrite_www_to_non_www ? @server_name.join("  ").gsub(/(^| )(www\.)?(?=[a-z0-9])/, '') : @server_name.join(" ") %>;
 
 <%= scope.function_template(["nginx/server/server_ssl_settings.erb"]) %>

templates/server/server_ssl_ipv6_listen.erb

@@ -0,0 +1,10 @@
+<%# check to see if ipv6 support exists in the kernel before applying -%>
+  <%- if @ipv6_enable -%>
+    <%- if @ipv6_listen_ip.is_a?(Array) then -%>
+      <%- @ipv6_listen_ip.each do |ipv6| -%>
+  listen [<%= ipv6 %>]:<%= @ssl_port %> ssl<% if @http2 == 'on' %> http2<% end %><% if @spdy == 'on' %> spdy<% end %><% if @ipv6_listen_options %> <%= @ipv6_listen_options %><% end %>;
+      <%- end -%>
+    <%- else -%>
+  listen       [<%= @ipv6_listen_ip %>]:<%= @ssl_port %> ssl<% if @http2 == 'on' %> http2<% end %><% if @spdy == 'on' %> spdy<% end %><% if @ipv6_listen_options %> <%= @ipv6_listen_options %><% end %>;
+    <%- end -%>
+  <%- end -%>