Volumes metrics doc update (#60)
* Description on the volume metrics
* image added
* Delete volume-metrics.png
* Add files via upload
* Update storage.rst
* Update storage.rst
diff --git a/source/_static/images/volume-metrics.png b/source/_static/images/volume-metrics.png
new file mode 100644
index 0000000..c857260
--- /dev/null
+++ b/source/_static/images/volume-metrics.png
Binary files differ
diff --git a/source/adminguide/storage.rst b/source/adminguide/storage.rst
index e92d9ef..109927b 100644
--- a/source/adminguide/storage.rst
+++ b/source/adminguide/storage.rst
@@ -698,6 +698,36 @@
Administrators should adjust these values depending on site policies
around data retention.
+Volume Metrics
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Volume statistics are collected on a regular interval (defined by global
+setting volume.stats.interval with a default of 600 seconds).
+This feature is currently only available for VMware and KVM.
+Volume stats include include bytes/s and IO/s statistics as shown in the
+API output bellow.
+
+.. code:: bash
+
+ [root@mgmt]# cmk list volumesmetrics id=272c3d8b-ef2c-499e-abfb-736b54d3d6b1
+ {
+ "count": 1,
+ "volume": [
+ {
+ ...
+ "diskiopstotal": 30245,
+ "diskioread": 22443,
+ "diskiowrite": 7802,
+ "diskkbsread": 343124,
+ "diskkbswrite": 217619,
+ ...
+Bytes read/write, as well as the total IO/s, are exposed via UI, as shown in the image below.
+
+|volume-metrics.png|
+
+These statistics are obtained from the hypervisor directly and they represent
+"current" bytes/s and IO/s values at the time of collection.
+
Working with Volume Snapshots
-----------------------------
@@ -910,5 +940,7 @@
:alt: Detach Disk Button.
.. |Migrateinstance.png| image:: /_static/images/migrate-instance.png
:alt: button to migrate a volume.
+.. |volume-metrics.png| image:: /_static/images/volume-metrics.png
+ :alt: Volume metrics
.. |volume-from-snap.png| image:: /_static/images/volume-from-snap.png
:alt: Offering is needed when creating a volume from the ROOT volume snapshot.
