Fix for Unable to create RAID1 on Dell BOSS card

This patch changes the RAID configuration schema so that 0 is allowed
for size_gb.  This allows passing 0 for the size, which the Dell Boot
Optimized Storage Solution (BOSS) requires.

Change-Id: I57cf290021e32809b248350688c3f83e7bbf7351
Task: #22082
Story: #2002536
Co-Authored-By: Digambar Patil <digambarpat@gmail.com>
Depends-On: Id149f6250318e6162a168d002671faa2b3a7989b

ironic/drivers/raid_config_schema.json

@@ -15,8 +15,7 @@
                     "size_gb": {
                         "anyOf": [{
                                    "type": "integer",
-                                   "minimum": 0,
-                                   "exclusiveMinimum": true
+                                   "minimum": 0
                                   },
                                   {
                                    "type": "string",

ironic/tests/unit/common/test_raid.py

@@ -69,6 +69,12 @@ class ValidateRaidConfigurationTestCase(base.TestCase):
                           raid_config,
                           raid_config_schema=self.schema)
 
+    def test_validate_configuration_zero_size_gb(self):
+        raid_config = json.loads(raid_constants.RAID_CONFIG_ZERO_SIZE_GB)
+
+        raid.validate_configuration(raid_config,
+                                    raid_config_schema=self.schema)
+
     def test_validate_configuration_max_size_gb(self):
         raid_config = json.loads(raid_constants.RAID_CONFIG_MAX_SIZE_GB)
         raid.validate_configuration(raid_config,

ironic/tests/unit/raid_constants.py

@@ -84,6 +84,17 @@ RAID_CONFIG_INVALID_SIZE_GB = '''
 }
 '''
 
+RAID_CONFIG_ZERO_SIZE_GB = '''
+{
+  "logical_disks": [
+      {
+       "raid_level": "1",
+       "size_gb": 0
+      }
+  ]
+}
+'''
+
 RAID_CONFIG_MAX_SIZE_GB = '''
 {
   "logical_disks": [

releasenotes/notes/raid-dell-boss-e9c5da9ddceedd67.yaml

@@ -0,0 +1,4 @@
+---
+features:
+  - Adds support for RAID 1 creation on Dell Boot Optimized Storage Solution
+    (BOSS).