From e0d3d44b64ac5416b583b058690f69c61ffdd175 Mon Sep 17 00:00:00 2001
From: Alexey Dushechkin <alexey.dushechkin@gmail.com>
Date: Wed, 8 Jun 2016 22:19:32 +0600
Subject: [PATCH] Add Nova extensions blacklisting

Operators may want to mask certain Nova extensions
in Horizon for performance reasons. This change
adds configurable extensions list to mask.

Change-Id: I8dff0647608833ac370a4fdab7db7dd6f39aa7c3
---
 defaults/main.yml                                     |  5 +++++
 ...dd-nova-extensions-blacklist-8ed18f45aba6a7fb.yaml | 11 +++++++++++
 templates/horizon_local_settings.py.j2                |  8 ++++++++
 3 files changed, 24 insertions(+)
 create mode 100644 releasenotes/notes/add-nova-extensions-blacklist-8ed18f45aba6a7fb.yaml

diff --git a/defaults/main.yml b/defaults/main.yml
index 8090fc6b..1428104c 100644
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -154,6 +154,11 @@ horizon_swift_file_transfer_chunk_size: 524288
 ## Panel
 horizon_default_panel: overview
 
+# For blacklisting certain Nova extensions uncomment this configuration,
+# and add necessary list items.
+# horizon_nova_extensions_blacklist:
+#   - "SimpleTenantUsage"
+
 ## Customization module
 ## See http://docs.openstack.org/developer/horizon/topics/customizing.html#horizon-customization-module-overrides
 # horizon_customization_module: /local/path/to/customization_module.py
diff --git a/releasenotes/notes/add-nova-extensions-blacklist-8ed18f45aba6a7fb.yaml b/releasenotes/notes/add-nova-extensions-blacklist-8ed18f45aba6a7fb.yaml
new file mode 100644
index 00000000..59e7758f
--- /dev/null
+++ b/releasenotes/notes/add-nova-extensions-blacklist-8ed18f45aba6a7fb.yaml
@@ -0,0 +1,11 @@
+---
+features:
+  - |
+    Deployers can now blacklist certain Nova extensions
+    by providing a list of such extensions in
+    ``horizon_nova_extensions_blacklist`` variable, for example:
+
+    .. code-block:: yaml
+
+        horizon_nova_extensions_blacklist:
+          - "SimpleTenantUsage"
diff --git a/templates/horizon_local_settings.py.j2 b/templates/horizon_local_settings.py.j2
index 92e308de..7b1455c7 100644
--- a/templates/horizon_local_settings.py.j2
+++ b/templates/horizon_local_settings.py.j2
@@ -711,6 +711,14 @@ REST_API_REQUIRED_SETTINGS = ['OPENSTACK_HYPERVISOR_FEATURES']
 # http://tinyurl.com/anticlickjack
 #DISALLOW_IFRAME_EMBED = True
 
+{% if horizon_nova_extensions_blacklist is defined %}
+OPENSTACK_NOVA_EXTENSIONS_BLACKLIST = [
+{% for item in horizon_nova_extensions_blacklist %}
+  '{{ item }}',
+{% endfor %}
+]
+{% endif %}
+
 {% if horizon_site_name is defined %}
 SITE_BRANDING = '{{ horizon_site_name }}'
 {% endif %}