[COST-5430] Adjust EBS rate to be a daily rate

example_aws_static_data.yml

@@ -1,7 +1,7 @@
 ---
   generators:
     - EC2Generator:
-        start_date: 2020-03-01
+        start_date: today
         processor_arch: 32-bit
         resource_id: 55555555
         product_sku: VEAJHRNKTJZQ
@@ -52,6 +52,19 @@
           family: 'Memory Optimized'
           cost: 1.000
           rate: 0.500
+    - EBSGenerator:
+        start_date: today
+        product_sku: VEAJHRNBBBBD
+        resource_id: 12345674
+        amount: 8
+        rate: 0.1
+        tags:
+          resourceTags/user:storageclass: gamma
+          resourceTags/user:Mapping: d1
+          resourceTags/user:Map: d2
+        cost_category:
+          costCategory/env: ephemeral
+
 
 
   accounts:

nise/__init__.py

@@ -1,3 +1,4 @@
-__version__ = "4.6.6"
+__version__ = "4.6.7"
+
 
 VERSION = __version__.split(".")

nise/generators/aws/ebs_generator.py

@@ -15,6 +15,7 @@
 # along with this program.  If not, see <https://www.gnu.org/licenses/>.
 #
 """Module for ebs data generation."""
+import calendar
 from random import choice
 from random import uniform
 
@@ -53,25 +54,32 @@ def _get_storage(self):
         """Get storage data."""
         return choice(self.STORAGE)
 
+    def _calculate_cost_per_day(self, start):
+        """EBS charges in a monthly rate.
+        Therefore we need to convert to a daily rate to calculate the cost."""
+        num_days_in_month = calendar.monthrange(start.year, start.month)[1]
+        hours_in_month = num_days_in_month * 24
+        daily_rate = self._rate / hours_in_month
+        return self._amount * daily_rate
+
     def _update_data(self, row, start, end, **kwargs):
         """Update data with generator specific data."""
         row = self._add_common_usage_info(row, start, end)
 
-        rate = self._rate
         amount = self._amount
-        cost = amount * rate
+        cost = self._calculate_cost_per_day(start)
         location, aws_region, _, storage_region = self._get_location()
-        description = f"${rate} per GB-Month of snapshot data stored - {location}"
+        description = f"${self._rate} per GB-Month of snapshot data stored - {location}"
         burst, max_iops, max_thru, max_vol_size, vol_backed, vol_type = self._get_storage()
 
         row["lineItem/ProductCode"] = "AmazonEC2"
         row["lineItem/UsageType"] = f"{storage_region}:VolumeUsage"
         row["lineItem/Operation"] = "CreateVolume"
         row["lineItem/ResourceId"] = self._resource_id
         row["lineItem/UsageAmount"] = str(amount)
-        row["lineItem/UnblendedRate"] = str(rate)
+        row["lineItem/UnblendedRate"] = str(self._rate)
         row["lineItem/UnblendedCost"] = str(cost)
-        row["lineItem/BlendedRate"] = str(rate)
+        row["lineItem/BlendedRate"] = str(self._rate)
         row["lineItem/BlendedCost"] = str(cost)
         row["lineItem/LineItemDescription"] = description
         row["product/ProductName"] = "Amazon Elastic Compute Cloud"
@@ -89,7 +97,7 @@ def _update_data(self, row, start, end, **kwargs):
         row["product/usagetype"] = f"{storage_region}:VolumeUsage"
         row["product/volumeType"] = vol_type
         row["pricing/publicOnDemandCost"] = str(cost)
-        row["pricing/publicOnDemandRate"] = str(rate)
+        row["pricing/publicOnDemandRate"] = str(self._rate)
         row["pricing/term"] = "OnDemand"
         row["pricing/unit"] = "GB-Mo"
         self._add_tag_data(row)