Add end slash to Graphite Endpoint.
diff --git a/horizon/files/horizon_settings/_local_settings.py b/horizon/files/horizon_settings/_local_settings.py
index 965f8c5..8148ddc 100644
--- a/horizon/files/horizon_settings/_local_settings.py
+++ b/horizon/files/horizon_settings/_local_settings.py
@@ -150,7 +150,7 @@
{%- if plugin.metric.engine == "graphite" %}
GRAPHITE_HOST = "{{ plugin.metric.host }}"
GRAPHITE_PORT = "{{ plugin.metric.port }}"
-GRAPHITE_ENDPOINT = 'http://%s:%s' % (GRAPHITE_HOST, GRAPHITE_PORT)
+GRAPHITE_ENDPOINT = 'http://%s:%s/' % (GRAPHITE_HOST, GRAPHITE_PORT)
{%- endif %}
{%- endif %}