Add the ability to specify multiple disks on the SoftLayer driver

Refs #19954

doc/topics/cloud/softlayer.rst

@@ -140,7 +140,40 @@ instance.
 
 disk_size
 ---------
-The amount of disk space that will be allocated to this image, in megabytes.
+The amount of disk space that will be allocated to this image, in gigabytes.
+
+.. code-block:: yaml
+
+    base_softlayer_ubuntu:
+      disk_size: 100
+
+Using Multiple Disks
+~~~~~~~~~~~~~~~~~~~~
+
+.. versionadded:: 2015.8.1
+
+SoftLayer allows up to 5 disks to be specified for a virtual machine upon
+creation. Multiple disks can be specified either as a list or a comma-delimited
+string. The first ``disk_size`` specified in the string or list will be the first
+disk size assigned to the VM.
+
+List Example:
+.. code-block:: yaml
+
+    base_softlayer_ubuntu:
+      disk_size: ['100', '20', '20']
+
+String Example:
+.. code-block:: yaml
+
+    base_softlayer_ubuntu:
+      disk_size: '100, 20, 20'
+
+.. note::
+
+    All disks listed in the ``disk_size`` configuration will be created either as
+    SAN disks or local disks, depending on if the ``local_disk`` configuration
+    is set to ``true`` or not. See ``local_disk`` parameter below.
 
 local_disk
 ----------

salt/cloud/clouds/softlayer.py

@@ -281,10 +281,29 @@ def create(vm_):
 
     if 'image' in vm_:
         kwargs['operatingSystemReferenceCode'] = vm_['image']
-        kwargs['blockDevices'] = [{
-            'device': '0',
-            'diskImage': {'capacity': vm_['disk_size']},
-        }]
+        kwargs['blockDevices'] = []
+        disks = vm_['disk_size']
+
+        if isinstance(disks, int):
+            disks = [str(disks)]
+        elif isinstance(disks, str):
+            disks = [size.strip() for size in disks.split(',')]
+
+        count = 0
+        for disk in disks:
+            block_device = {'device': str(count),
+                            'diskImage': {'capacity': str(disk)}}
+            kwargs['blockDevices'].append(block_device)
+            count += 1
+
+            if count > 4:
+                log.warning('More that 5 disks were specified for {0} .'
+                            'The first 5 disks will be applied to the VM, '
+                            'but the remaining disks will be ignored.\n'
+                            'Please adjust your cloud configuration to only '
+                            'specify a maximum of 5 disks.'.format(vm_['name']))
+                break
+
     elif 'global_identifier' in vm_:
         kwargs['blockDeviceTemplateGroup'] = {
             'globalIdentifier': vm_['global_identifier']