Fix supported system types retrieval for PowerVS regions

pkg/asset/installconfig/powervs/client.go

@@ -1113,7 +1113,6 @@ func (c *Client) GetDatacenterCapabilities(ctx context.Context, region string) (
 	return getOk.Payload.Capabilities, nil
 }
 
-// GetDatacenterSupportedSystems retrieves the capabilities of the specified datacenter.
 func (c *Client) GetDatacenterSupportedSystems(ctx context.Context, region string) ([]string, error) {
 	var err error
 	if c.BXCli.PISession == nil {
@@ -1122,12 +1121,15 @@ func (c *Client) GetDatacenterSupportedSystems(ctx context.Context, region strin
 			return nil, fmt.Errorf("failed to initialize PISession in GetDatacenterSupportedSystems: %w", err)
 		}
 	}
-	params := datacenters.NewV1DatacentersGetParamsWithContext(ctx).WithDatacenterRegion(region)
-	getOk, err := c.BXCli.PISession.Power.Datacenters.V1DatacentersGet(params)
+
+	// Use the global datacenter endpoint for accurate, non-cached data (other code uses a bulk endpoint)
+	datacenterClient := instance.NewIBMPIDatacenterClient(ctx, c.BXCli.PISession, "")
+	datacenter, err := datacenterClient.Get(region)
 	if err != nil {
 		return nil, fmt.Errorf("failed to get datacenter supported systems: %w", err)
 	}
-	return getOk.Payload.CapabilitiesDetails.SupportedSystems.General, nil
+
+	return datacenter.CapabilitiesDetails.SupportedSystems.General, nil
 }
 
 // TransitGatewayNameToID checks to see if the name is an existing transit gateway name.

pkg/asset/machines/worker.go

@@ -216,16 +216,30 @@ func defaultPowerVSMachinePoolPlatform(ic *types.InstallConfig) powervstypes.Mac
 			fallback = true
 			logrus.Warnf("For given zone %v, GetDatacenterSupportedSystems returns %v", ic.PowerVS.Zone, err)
 		} else {
-			// Is the hardcoded default of s922 in the list?
-			found := false
-			for _, st := range sysTypes {
-				if st == sysType {
-					found = true
-					break
+			if ic.PowerVS.Zone == "dal14" {
+				// Prefer s1022 over s1222 for better support in dal14 region (s922 not supported anymore)
+				for _, st := range sysTypes {
+					if st == "s1022" {
+						sysType = "s1022"
+						break
+					}
+				}
+				// If s1022 not found, fall back to using the first available system type (in case of dal14 this is s1222)
+				if sysType != "s1022" {
+					sysType = sysTypes[0]
+				}
+			} else {
+				// For other zones, check if the hardcoded default of s922 is in the list, this is the prior case code
+				found := false
+				for _, st := range sysTypes {
+					if st == sysType {
+						found = true
+						break
+					}
+				}
+				if !found {
+					sysType = sysTypes[0]
 				}
-			}
-			if !found {
-				sysType = sysTypes[0]
 			}
 		}
 	}
@@ -234,7 +248,22 @@ func defaultPowerVSMachinePoolPlatform(ic *types.InstallConfig) powervstypes.Mac
 		// Fallback to hardcoded list
 		sysTypes, err = powervstypes.AvailableSysTypes(ic.PowerVS.Region, ic.PowerVS.Zone)
 		if err == nil {
-			sysType = sysTypes[0]
+			// For dal14, prefer s1022 if available
+			if ic.PowerVS.Zone == "dal14" {
+				for _, st := range sysTypes {
+					if st == "s1022" {
+						sysType = "s1022"
+						break
+					}
+				}
+				// If s1022 not found, use first in list
+				if sysType != "s1022" {
+					sysType = sysTypes[0]
+				}
+			} else {
+				// this is prior case behavior
+				sysType = sysTypes[0]
+			}
 		} else {
 			logrus.Warnf("For given zone %v, AvailableSysTypes returns %v", ic.PowerVS.Zone, err)
 		}

pkg/types/powervs/powervs_regions.go

@@ -37,6 +37,9 @@ var Regions = map[string]Region{
 			"dal12": {
 				SysTypes: []string{"s922", "e980"},
 			},
+			"dal14": {
+				SysTypes: []string{"s1022", "e1080"},
+			},
 		},
 		VPCZones: []string{"us-south-1", "us-south-2", "us-south-3"},
 	},