Reduce deployed MAX_UPDATES_PER_SECOND from 2000 to 500. Deploy grafana with anonymous read access by default.

Change-Id: I63859382065254786e1edba2bdb30e3e0d9770ee

ansible/install/roles/grafana/tasks/main.yml

@@ -22,9 +22,16 @@
 - name: Set grafana server port
   ini_file:
     dest=/etc/grafana/grafana.ini
-    section=server
-    option=http_port
-    value={{grafana_port}}
+    section={{item.section}}
+    option={{item.option}}
+    value={{item.value}}
+  with_items:
+    - section: server
+      option: http_port
+      value: "{{grafana_port}}"
+    - section: auth.anonymous
+      option: enabled
+      value: true
   become: true
 
 # disable firewalld (might need to create specific firewall rules or leave it to admin to do via iptables)

ansible/install/roles/graphite/files/carbon.conf

@@ -60,12 +60,12 @@ MAX_CACHE_SIZE = inf
 # prevent over-utilizing the disk and thus starving the rest of the system.
 # When the rate of required updates exceeds this, then carbon's caching will
 # take effect and increase the overall throughput accordingly.
-MAX_UPDATES_PER_SECOND = 2000
+MAX_UPDATES_PER_SECOND = 500
 
 # If defined, this changes the MAX_UPDATES_PER_SECOND in Carbon when a
 # stop/shutdown is initiated.  This helps when MAX_UPDATES_PER_SECOND is
 # relatively low and carbon has cached a lot of updates; it enables the carbon
-# daemon to shutdown more quickly. 
+# daemon to shutdown more quickly.
 # MAX_UPDATES_PER_SECOND_ON_SHUTDOWN = 1000
 
 # Softly limits the number of whisper files that get created each minute.
@@ -316,7 +316,7 @@ FORWARD_ALL = True
 # use multiple carbon-cache instances then it would look like this:
 #
 # DESTINATIONS = 127.0.0.1:2004:a, 127.0.0.1:2104:b
-# 
+#
 # The format is comma-delimited IP:PORT:INSTANCE where the :INSTANCE part is
 # optional and refers to the "None" instance if omitted.
 #