Add basic installation of Apache web server.

This adds the classes 'apache', containing variables for various files
and directories that Apache uses, and 'apache::base', doing the basic
installation of the Apache package and starting of the service.

manifests/init.pp

+# Copyright (C) 2012 Thomas Bellman.
+# Licensed under the GNU LGPL v3+; see the README file for more information.
+
+
+import "nsc-puppet-utils"
+
+
+/*
+ * Various Apache httpd constants.
+ * Mostly expected to be used internally by the classes and definitions
+ * below.
+ */
+class apache
+{
+    $configfile = '/etc/httpd/conf/httpd.conf'
+    $configdir  = '/etc/httpd/conf.d'
+}
+
+
+
+/*
+ * Basic installation of the Apache web server.
+ *
+ * This disables the reading of all everything in the conf.d directory,
+ * which the standard Apache configuration file in RedHat:is OS:es
+ * does, instead forcing users to explicitly load only those files
+ * they need.  It will also remove all unmanaged files from that
+ * directory.
+ */
+class apache::base
+{
+    include apache
+
+    package {
+	'httpd':
+	    ensure => installed;
+    }
+    file {
+	# Keep the conf.d directory clean from all config files except for
+	# the ones explicitly managed from Puppet.
+	$apache::configdir:
+	    ensure => directory,
+	    recurse => true, purge => true, force => true, backup => false,
+	    require => Package['httpd'], notify => Service['httpd'];
+    }
+    # We do not want to blindly include things in the conf.d directory.
+    ensure_line {
+	'apache::base::no_include_all':
+	    file => $apache::configfile,
+	    line => '##--Include conf.d/*.conf',
+	    pattern => '^\s*Include\s+conf\.d/\*\.conf\s*$',
+	    require => Package['httpd'],
+	    notify => Service['httpd'];
+    }
+    service {
+	'httpd':
+	    enable => true, ensure => $running,
+	    hasstatus => true, hasrestart => true;
+    }
+}