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Validate volume resize on the schema (#660)

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Signed-off-by: Alexander Dahmen <alexander.dahmen@inovex.de>
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Alexander Dahmen 2025-01-31 10:43:36 +01:00 • committed by GitHub
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36
stackit/internal/services/iaas/volume/resource.go
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@ -247,6 +247,9 @@ func (r *volumeResource) Schema(_ context.Context, _ resource.SchemaRequest, res
"size": schema.Int64Attribute{
Description: "The size of the volume in GB. It can only be updated to a larger value than the current size. Either `size` or `source` must be provided",
Optional: true,
PlanModifiers: []planmodifier.Int64{
volumeResizeModifier{},
},
},
"source": schema.SingleNestedAttribute{
Description: "The source of the volume. It can be either a volume, an image, a snapshot or a backup. Either `size` or `source` must be provided",
@ -275,6 +278,39 @@ func (r *volumeResource) Schema(_ context.Context, _ resource.SchemaRequest, res
}
}
var _ planmodifier.Int64 = volumeResizeModifier{}
type volumeResizeModifier struct {
}
// Description implements planmodifier.String.
func (v volumeResizeModifier) Description(context.Context) string {
return "validates volume resize"
}
// MarkdownDescription implements planmodifier.String.
func (v volumeResizeModifier) MarkdownDescription(ctx context.Context) string {
return v.Description(ctx)
}
// PlanModifyInt64 implements planmodifier.Int64.
func (v volumeResizeModifier) PlanModifyInt64(ctx context.Context, req planmodifier.Int64Request, resp *planmodifier.Int64Response) { // nolint:gocritic // function signature required by Terraform
var planSize types.Int64
var currentSize types.Int64
resp.Diagnostics.Append(req.Plan.GetAttribute(ctx, path.Root("size"), &planSize)...)
if resp.Diagnostics.HasError() {
return
}
resp.Diagnostics.Append(req.State.GetAttribute(ctx, path.Root("size"), &currentSize)...)
if resp.Diagnostics.HasError() {
return
}
if planSize.ValueInt64() < currentSize.ValueInt64() {
core.LogAndAddError(ctx, &resp.Diagnostics, "Error changing volume size", "A volume cannot be made smaller in order to prevent data loss.")
}
}
// Create creates the resource and sets the initial Terraform state.
func (r *volumeResource) Create(ctx context.Context, req resource.CreateRequest, resp *resource.CreateResponse) { // nolint:gocritic // function signature required by Terraform
// Retrieve values from plan