Updated Graphite docs page with instruction on how to add a graphite data source

docs/sources/datasources/graphite.md

@@ -10,9 +10,21 @@ Grafana has an advanced graphite query editor that lets you quickly navigate the
 Change function paramaters and much more. The editor cannot handle all types of queries yet.
 To switch to a regular text box click the pen icon to the right.
 
-## Installing Graphite
-
 ## Adding the data source to Grafana
+Open the side menu by clicking the the Grafana icon in the top header. In the side menu under the `Dashboards` link you
+should find a link named `Data Sources`. If this link is missing in the side menu it means that your current
+user does not have the `Admin` role for the current organization.
+
+![](/img/v2/add_datasource_graphite.png)
+
+Now click the `Add new` link in the top header.
+
+Name | Description
+------------ | -------------
+Name | The data source name, important that this is the same as in Grafana v1.x if you plan to import old dashboards.
+Default | Default data source means that it will be pre-selected for new panels.
+Url | The http protocol, ip and port of you graphite-web or graphite-api install.
+Access | Proxy = access via Grafana backend, Direct = access directory from browser.
 
 ## Metric editor
 
@@ -39,3 +51,9 @@ Some functions like aliasByNode support an optional second argument. To add this
 ![](/img/animated_gifs/func_editor_optional_params.gif)
 
 ## Point consolidation
+
+All graphite metrics are consolidated so that graphite doesn't return more data points than there are pixels in the graph. By default
+this consolidation is done using `avg` function. You can how graphite consolidates metrics by adding the Graphite consolidateBy function.
+
+> *Notice* This means that legend summary values (max, min, total) cannot be all correct at the same time. They are calculated
+> client side by Grafana. And depending on your consolidation function only one or two can be correct at the same time.