storage: add multiple local storages on kvm (#333)

Author: weizhouapache

source/adminguide/storage.rst

@@ -146,6 +146,30 @@ could provision 1 iSCSI LUN initially and then add a second iSCSI LUN
 when the first approaches capacity.
 
 
+Using Multiple Local Storages (KVM only)
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Since CloudStack 4.17.0.0, multiple local storages are supported on KVM hosts.
+
+In order to use multiple local storages, you need to
+
+#. Enable Local Storage For User VMs in the zone setting
+
+#. Create local directories on kvm hosts
+
+#. Edit /etc/cloudstack/agent/agent.properties
+
+    - Add extra directories to "local.storage.path"
+    - Add UUID of directories to "local.storage.uuid" (UUID can be generated by `uuidgen`)
+
+    .. parsed-literal::
+
+       local.storage.uuid=a43943c1-1759-4073-9db1-bc0ea19203aa,f5b1220b-4446-42dc-a872-cffd281f9f8c
+       local.storage.path=/var/lib/libvirt/images,/var/lib/libvirt/images2
+
+#. Restart cloudstack-agent service
+
+
 Storage Tags
 ~~~~~~~~~~~~