Introduce glance:config to manage custom options

This glance::config is aim to use glance_config resources
to manage custom configurations in glance config files.

This will make end user easy to add their own custom options
in Hiera data.

Fully implements blueprint glance-custom-config

Change-Id: Idc47b6bda3ea38e582501278f82c9c6841b8cdf0

manifests/config.pp

@@ -0,0 +1,56 @@
+# == Class: glance::config
+#
+# This class is used to manage arbitrary glance configurations.
+#
+# === Parameters
+#
+# [*xxx_config*]
+#   (optional) Allow configuration of arbitrary glance configurations.
+#   The value is an hash of glance_config resources. Example:
+#   { 'DEFAULT/foo' => { value => 'fooValue'},
+#     'DEFAULT/bar' => { value => 'barValue'}
+#   }
+#   In yaml format, Example:
+#   glance_config:
+#     DEFAULT/foo:
+#       value: fooValue
+#     DEFAULT/bar:
+#       value: barValue
+#
+# [**api_config**]
+#   (optional) Allow configuration of glance-api.conf configurations.
+#
+# [**api_paste_ini_config**]
+#   (optional) Allow configuration of glance-api-paste.ini configurations.
+#
+# [**registry_config**]
+#   (optional) Allow configuration of glance-registry.conf configurations.
+#
+# [**registry_paste_ini_config**]
+#   (optional) Allow configuration of glance-registry-paste.ini configurations.
+#
+# [**cache_config**]
+#   (optional) Allow configuration of glance-cache.conf configurations.
+#
+#   NOTE: The configuration MUST NOT be already handled by this module
+#   or Puppet catalog compilation will fail with duplicate resources.
+#
+class glance::config (
+  $api_config                 = {},
+  $api_paste_ini_config       = {},
+  $registry_config            = {},
+  $registry_paste_ini_config  = {},
+  $cache_config               = {},
+) {
+  validate_hash($api_config)
+  validate_hash($api_paste_ini_config)
+  validate_hash($registry_config)
+  validate_hash($registry_paste_ini_config)
+  validate_hash($cache_config)
+
+  create_resources('glance_api_config', $api_config)
+  create_resources('glance_api_paste_ini', $api_paste_ini_config)
+  create_resources('glance_registry_config', $registry_config)
+  create_resources('glance_registry_paste_ini', $registry_paste_ini_config)
+  create_resources('glance_cache_config', $cache_config)
+}