fix(server): Handle boot bolume correctly

- Display id and delete_on_termination in datasource
- Handle id and delete_on_termination in resource

Signed-off-by: Alexander Dahmen <alexander.dahmen@inovex.de>

Author: Fyusel

docs/data-sources/server.md

@@ -43,7 +43,4 @@ Server datasource schema. Must have a `region` specified in the provider configu
 Read-Only:
 
 - `delete_on_termination` (Boolean) Delete the volume during the termination of the server.
-- `id` (String) The ID of the source, either image ID or volume ID
-- `performance_class` (String) The performance class of the server.
-- `size` (Number) The size of the boot volume in GB.
-- `type` (String) The type of the source. Supported values are: `volume`, `image`.
+- `id` (String) The ID of the boot volume

docs/data-sources/server_backup_schedule.md

@@ -52,5 +52,3 @@ Read-Only:
 - `name` (String)
 - `retention_period` (Number)
 - `volume_ids` (List of String)
-
-

docs/data-sources/server_backup_schedules.md

@@ -58,5 +58,3 @@ Read-Only:
 - `name` (String)
 - `retention_period` (Number)
 - `volume_ids` (List of String)
-
-

docs/resources/server.md

@@ -410,3 +410,7 @@ Optional:
 - `delete_on_termination` (Boolean) Delete the volume during the termination of the server. Only allowed when `source_type` is `image`.
 - `performance_class` (String) The performance class of the server.
 - `size` (Number) The size of the boot volume in GB. Must be provided when `source_type` is `image`.
+
+Read-Only:
+
+- `id` (String) The ID of the boot volume

docs/resources/server_backup_schedule.md

@@ -62,5 +62,3 @@ Required:
 Optional:
 
 - `volume_ids` (List of String)
-
-

stackit/internal/services/iaas/server/datasource.go

@@ -7,6 +7,7 @@ import (
 	"strings"
 	"time"
 
+	"github.com/hashicorp/terraform-plugin-framework/attr"
 	"github.com/hashicorp/terraform-plugin-framework/datasource"
 	"github.com/hashicorp/terraform-plugin-framework/datasource/schema"
 	"github.com/hashicorp/terraform-plugin-framework/diag"
@@ -18,7 +19,6 @@ import (
 	"github.com/stackitcloud/stackit-sdk-go/core/oapierror"
 	"github.com/stackitcloud/stackit-sdk-go/services/iaas"
 	"github.com/stackitcloud/terraform-provider-stackit/stackit/internal/core"
-	"github.com/stackitcloud/terraform-provider-stackit/stackit/internal/utils"
 	"github.com/stackitcloud/terraform-provider-stackit/stackit/internal/validate"
 )
 
@@ -46,6 +46,11 @@ type DataSourceModel struct {
 	UpdatedAt         types.String `tfsdk:"updated_at"`
 }
 
+var bootVolumeDataTypes = map[string]attr.Type{
+	"id":                    basetypes.StringType{},
+	"delete_on_termination": basetypes.BoolType{},
+}
+
 // NewServerDataSource is a helper function to simplify the provider implementation.
 func NewServerDataSource() datasource.DataSource {
 	return &serverDataSource{}
@@ -139,20 +144,8 @@ func (r *serverDataSource) Schema(_ context.Context, _ datasource.SchemaRequest,
 				Description: "The boot volume for the server",
 				Computed:    true,
 				Attributes: map[string]schema.Attribute{
-					"performance_class": schema.StringAttribute{
-						Description: "The performance class of the server.",
-						Computed:    true,
-					},
-					"size": schema.Int64Attribute{
-						Description: "The size of the boot volume in GB.",
-						Computed:    true,
-					},
-					"type": schema.StringAttribute{
-						Description: "The type of the source. " + utils.SupportedValuesDocumentation(supportedSourceTypes),
-						Computed:    true,
-					},
 					"id": schema.StringAttribute{
-						Description: "The ID of the source, either image ID or volume ID",
+						Description: "The ID of the boot volume",
 						Computed:    true,
 					},
 					"delete_on_termination": schema.BoolAttribute{
@@ -312,6 +305,19 @@ func mapDataSourceFields(ctx context.Context, serverResp *iaas.Server, model *Da
 		model.NetworkInterfaces = types.ListNull(types.StringType)
 	}
 
+	if serverResp.BootVolume != nil {
+		bootVolume, diags := types.ObjectValue(bootVolumeDataTypes, map[string]attr.Value{
+			"id":                    types.StringPointerValue(serverResp.BootVolume.Id),
+			"delete_on_termination": types.BoolPointerValue(serverResp.BootVolume.DeleteOnTermination),
+		})
+		if diags.HasError() {
+			return fmt.Errorf("failed to map bootVolume: %w", core.DiagsToError(diags))
+		}
+		model.BootVolume = bootVolume
+	} else {
+		model.BootVolume = types.ObjectNull(bootVolumeDataTypes)
+	}
+
 	model.AvailabilityZone = types.StringPointerValue(serverResp.AvailabilityZone)
 	model.ServerId = types.StringValue(serverId)
 	model.MachineType = types.StringPointerValue(serverResp.MachineType)

stackit/internal/services/iaas/server/resource.go

@@ -75,6 +75,7 @@ type Model struct {
 
 // Struct corresponding to Model.BootVolume
 type bootVolumeModel struct {
+	Id                  types.String `tfsdk:"id"`
 	PerformanceClass    types.String `tfsdk:"performance_class"`
 	Size                types.Int64  `tfsdk:"size"`
 	SourceType          types.String `tfsdk:"source_type"`
@@ -89,6 +90,7 @@ var bootVolumeTypes = map[string]attr.Type{
 	"source_type":           basetypes.StringType{},
 	"source_id":             basetypes.StringType{},
 	"delete_on_termination": basetypes.BoolType{},
+	"id":                    basetypes.StringType{},
 }
 
 // NewServerResource is a helper function to simplify the provider implementation.
@@ -253,6 +255,13 @@ func (r *serverResource) Schema(_ context.Context, _ resource.SchemaRequest, res
 					objectplanmodifier.RequiresReplace(),
 				},
 				Attributes: map[string]schema.Attribute{
+					"id": schema.StringAttribute{
+						Description: "The ID of the boot volume",
+						Computed:    true,
+						PlanModifiers: []planmodifier.String{
+							stringplanmodifier.UseStateForUnknown(),
+						},
+					},
 					"performance_class": schema.StringAttribute{
 						Description: "The performance class of the server.",
 						Optional:    true,
@@ -911,6 +920,34 @@ func mapFields(ctx context.Context, serverResp *iaas.Server, model *Model) error
 		model.NetworkInterfaces = types.ListNull(types.StringType)
 	}
 
+	if serverResp.BootVolume != nil {
+		// convert boot volume model
+		var bootVolumeModel = &bootVolumeModel{}
+		if !(model.BootVolume.IsNull() || model.BootVolume.IsUnknown()) {
+			diags := model.BootVolume.As(ctx, bootVolumeModel, basetypes.ObjectAsOptions{})
+			if diags.HasError() {
+				return fmt.Errorf("failed to map bootVolume: %w", core.DiagsToError(diags))
+			}
+		}
+
+		// Only the id and delete_on_termination is returned via response.
+		// Take the other values from the model.
+		bootVolume, diags := types.ObjectValue(bootVolumeTypes, map[string]attr.Value{
+			"id":                    types.StringPointerValue(serverResp.BootVolume.Id),
+			"delete_on_termination": types.BoolPointerValue(serverResp.BootVolume.DeleteOnTermination),
+			"source_id":             bootVolumeModel.SourceId,
+			"size":                  bootVolumeModel.Size,
+			"source_type":           bootVolumeModel.SourceType,
+			"performance_class":     bootVolumeModel.PerformanceClass,
+		})
+		if diags.HasError() {
+			return fmt.Errorf("failed to map bootVolume: %w", core.DiagsToError(diags))
+		}
+		model.BootVolume = bootVolume
+	} else {
+		model.BootVolume = types.ObjectNull(bootVolumeTypes)
+	}
+
 	model.ServerId = types.StringValue(serverId)
 	model.MachineType = types.StringPointerValue(serverResp.MachineType)