pxe: Allow disabling http server

This change introduces a new option to disable resources to set up http
server for ipxe boot. This is useful, when ipxe boot interface is not
used or users have their own external tooling to maintain the http
server.

Change-Id: Ic767795442ee68ce8dda6bc8b53493ac17f6f40c

manifests/pxe.pp

@@ -79,6 +79,10 @@
 #   (optional) Log facility of the dnsmasq process to server tftp server.
 #   Defaults to undef
 #
+# [*manage_http_server*]
+#   (optional) Set up Apache HTTP Server.
+#   Defaults to true
+#
 class ironic::pxe (
   $package_ensure          = 'present',
   $tftp_root               = '/tftpboot',
@@ -93,6 +97,7 @@ class ironic::pxe (
   $uefi_pxe_bootfile_name  = 'bootx64.efi',
   $tftp_use_xinetd         = $::ironic::params::xinetd_available,
   $dnsmasq_log_facility    = undef,
+  $manage_http_server      = true,
 ) inherits ironic::params {
 
   include ironic::deps
@@ -136,15 +141,6 @@ class ironic::pxe (
     tag     => 'ironic-tftp-file',
   }
 
-  file { $http_root_real:
-    ensure  => 'directory',
-    seltype => 'httpd_sys_content_t',
-    owner   => $::ironic::params::user,
-    group   => $::ironic::params::group,
-    require => Anchor['ironic::config::begin'],
-    before  => Anchor['ironic::config::end'],
-  }
-
   if $tftp_use_xinetd {
     if ! $::ironic::params::xinetd_available {
       fail('xinetd is not available in this distro. Please use tftp_use_xinetd=false')
@@ -320,6 +316,17 @@ class ironic::pxe (
 
   File["${tftp_root_real}"] -> File<| tag == 'ironic-tftp-file' |>
 
+  # HTTP server
+  if $manage_http_server {
+    file { $http_root_real:
+      ensure  => 'directory',
+      seltype => 'httpd_sys_content_t',
+      owner   => $::ironic::params::user,
+      group   => $::ironic::params::group,
+      require => Anchor['ironic::config::begin'],
+      before  => Anchor['ironic::config::end'],
+    }
+
     include apache
 
     apache::vhost { 'ipxe_vhost':
@@ -328,4 +335,5 @@ class ironic::pxe (
       docroot  => $http_root_real,
       port     => $http_port_real,
     }
+  }
 }

releasenotes/notes/manage_http_server-bc9a073ba0c997ee.yaml

@@ -0,0 +1,6 @@
+---
+features:
+  - |
+    The ``ironic::pxe::manage_http_server`` parameter has been added. When
+    this parameter is set to ``false``, the ``ironic::pxe`` class does not
+    manage the Apache HTTP Server.

spec/classes/ironic_pxe_spec.rb

@@ -223,6 +223,18 @@ describe 'ironic::pxe' do
         is_expected.not_to contain_file('/var/lib/ironic/tftpboot/chain.c32')
       end
     end
+
+    context 'when http server disabled' do
+      before :each do
+        params.merge!(
+          :manage_http_server => false,
+        )
+      end
+      it 'should not configure http server' do
+        is_expected.not_to contain_class('apache')
+        is_expected.not_to contain_apache__vhost('ipxe_vhost')
+      end
+    end
   end
 
   shared_examples_for 'ironic pxe with xinetd' do