upcoming: Hide new Volume count limit changes behind a feature flag

packages/manager/CHANGELOG.md

@@ -14,7 +14,6 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/) and this p
 - Linked Node Pool firewall in Node Pool footer for LKE-E clusters ([#12779](https://github.com/linode/manager/pull/12779))
 - IAM RBAC: Implement IAM RBAC permissions for NodeBalancer ([#12780](https://github.com/linode/manager/pull/12780))
 - IAM RBAC: Implement IAM RBAC permissions for NodeBalancer summary tab ([#12790](https://github.com/linode/manager/pull/12790))
-- Additional device slots to Linode Config and Rescue Dialog to match new API limits ([#12791](https://github.com/linode/manager/pull/12791))
 
 ### Changed:
 
@@ -77,6 +76,7 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/) and this p
 - ACLP-Metrics,Alerts: enforce validation for 100 characters for TextField components ([#12771](https://github.com/linode/manager/pull/12771))
 - Disable legacy interface selection for Linode Interfaces when creating a Linode from backups ([#12772](https://github.com/linode/manager/pull/12772))
 - UX feedback: Change /settings to /account-settings and profile/settings to profile/preferences ([#12785](https://github.com/linode/manager/pull/12785))
+- Add additional device slots to Linode Config and Rescue Dialog to match new API limits ([#12791](https://github.com/linode/manager/pull/12791))
 - Add Firewall option to the Add Node Pool Drawer for LKE Enterprise Kubernetes Clusters ([#12793](https://github.com/linode/manager/pull/12793))
 - CloudPulse-Metrics: Update CloudPulseRegionSelect.tsx to handle default linode region selection in firewalls contextual view ([#12805](https://github.com/linode/manager/pull/12805))
 

packages/manager/src/constants.ts

@@ -290,3 +290,7 @@ export const DISALLOWED_IMAGE_REGIONS = [
 // Default tooltip text for actions without permission
 export const NO_PERMISSION_TOOLTIP_TEXT =
   'You do not have permission to perform this action.';
+
+// Default device limit for Linode Configuration profiles. Configuration profiles can have have up to 64
+// devices depending on the Linode's RAM, but will always be able to have at least 8.
+export const DEFAULT_DEVICE_LIMIT = 8;

packages/manager/src/dev-tools/FeatureFlagTool.tsx

@@ -26,6 +26,7 @@ const options: { flag: keyof Flags; label: string }[] = [
   { flag: 'apl', label: 'Akamai App Platform' },
   { flag: 'aplGeneralAvailability', label: 'Akamai App Platform GA' },
   { flag: 'blockStorageEncryption', label: 'Block Storage Encryption (BSE)' },
+  { flag: 'blockStorageVolumeLimit', label: 'Block Storage Volume Limit' },
   { flag: 'cloudNat', label: 'Cloud NAT' },
   { flag: 'disableLargestGbPlans', label: 'Disable Largest GB Plans' },
   { flag: 'gecko2', label: 'Gecko' },

packages/manager/src/featureFlags.ts

@@ -144,6 +144,7 @@ export interface Flags {
   apl: boolean;
   aplGeneralAvailability: boolean;
   blockStorageEncryption: boolean;
+  blockStorageVolumeLimit: boolean;
   cloudManagerDesignUpdatesBanner: DesignUpdatesBannerFlag;
   cloudNat: CloudNatFlag;
   databaseAdvancedConfig: boolean;

packages/manager/src/features/Linodes/LinodesDetail/LinodeConfigs/LinodeConfigDialog.tsx

@@ -68,7 +68,7 @@ import {
   StyledFormGroup,
   StyledRadioGroup,
 } from './LinodeConfigDialog.styles';
-import { getPrimaryInterfaceIndex } from './utilities';
+import { getPrimaryInterfaceIndex, useGetDeviceLimit } from './utilities';
 
 import type { ExtendedInterface } from '../LinodeSettings/InterfaceSelect';
 import type {
@@ -243,7 +243,7 @@ export const LinodeConfigDialog = (props: Props) => {
     // eslint-disable-next-line no-console
     console.warn('Invalid memory value:', availableMemory);
   }
-  const deviceLimit = Math.max(8, Math.min(availableMemory / 1024, 64));
+  const deviceLimit = useGetDeviceLimit(availableMemory);
 
   const { isLinodeInterfacesEnabled } = useIsLinodeInterfacesEnabled();
 

packages/manager/src/features/Linodes/LinodesDetail/LinodeConfigs/utilities.test.ts

@@ -1,6 +1,9 @@
 import { linodeConfigInterfaceFactory } from '@linode/utilities';
+import { renderHook } from '@testing-library/react';
 
-import { getPrimaryInterfaceIndex } from './utilities';
+import { wrapWithTheme } from 'src/utilities/testHelpers';
+
+import { getPrimaryInterfaceIndex, useGetDeviceLimit } from './utilities';
 
 describe('getPrimaryInterfaceIndex', () => {
   it('returns null if there are no interfaces', () => {
@@ -34,3 +37,36 @@
     expect(getPrimaryInterfaceIndex(interfaces)).toBe(null);
   });
 });
+
+describe('useGetDeviceLimit', () => {
+  it.each([131072, 65536, 16384, 1024])(
+    'should always return 8 as the device limit',
+    (value) => {
+      const { result } = renderHook(() => useGetDeviceLimit(value), {
+        wrapper: (ui) =>
+          wrapWithTheme(ui.children, {
+            flags: { blockStorageVolumeLimit: false },
+          }),
+      });
+      expect(result.current).toEqual(8);
+    }
+  );
+
+  it.each([
+    [131072, 64],
+    [65536, 64],
+    [16384, 16],
+    [1024, 8],
+  ])(
+    'should calculate the correct device limit for %d ram to be %d',
+    (value, expected) => {
+      const { result } = renderHook(() => useGetDeviceLimit(value), {
+        wrapper: (ui) =>
+          wrapWithTheme(ui.children, {
+            flags: { blockStorageVolumeLimit: true },
+          }),
+      });
+      expect(result.current).toEqual(expected);
+    }
+  );
+});

packages/manager/src/features/Linodes/LinodesDetail/LinodeConfigs/utilities.ts

@@ -1,5 +1,8 @@
 import { isEmpty } from '@linode/api-v4';
 
+import { DEFAULT_DEVICE_LIMIT } from 'src/constants';
+import { useFlags } from 'src/hooks/useFlags';
+
 import type { Interface } from '@linode/api-v4';
 
 /**
@@ -47,3 +50,20 @@ export const getPrimaryInterfaceIndex = (interfaces: Interface[]) => {
   // As an example, this is the case when a Linode only has a VLAN interface.
   return null;
 };
+
+/**
+ * Determines the maximum available Linodes allowed for a configuration profile
+ *
+ * returns MAX(8, MIN(ram / 1024, 64))
+ *
+ * @param ram the Linode's available ram
+ * @returns the device limit allowed
+ */
+export const useGetDeviceLimit = (ram: number) => {
+  const flags = useFlags();
+  if (flags.blockStorageVolumeLimit) {
+    return Math.max(DEFAULT_DEVICE_LIMIT, Math.min(ram / 1024, 64));
+  }
+
+  return DEFAULT_DEVICE_LIMIT;
+};

packages/manager/src/features/Linodes/LinodesDetail/LinodeRescue/StandardRescueDialog.tsx

@@ -23,6 +23,7 @@ import * as React from 'react';
 import { useEventsPollingActions } from 'src/queries/events/events';
 
 import { deviceSlots } from '../LinodeConfigs/constants';
+import { useGetDeviceLimit } from '../LinodeConfigs/utilities';
 import { LinodePermissionsError } from '../LinodePermissionsError';
 import { DeviceSelection } from './DeviceSelection';
 import { RescueDescription } from './RescueDescription';
@@ -79,7 +80,7 @@ export const StandardRescueDialog = (props: Props) => {
     // eslint-disable-next-line no-console
     console.warn('Invalid memory value:', availableMemory);
   }
-  const overallDeviceLimit = Math.max(8, Math.min(availableMemory / 1024, 64));
+  const overallDeviceLimit = useGetDeviceLimit(availableMemory);
   const rescueDeviceLimit = overallDeviceLimit - 2;
 
   const {