@@ -148,6 +148,17 @@ func newImageBuildOptions(ctx context.Context, r *http.Request) (*types.ImageBui

 	}

 	options.Version = builderVersion

+	if versions.GreaterThanOrEqualTo(version, "1.40") {

+		outputsJSON := r.FormValue("outputs")

+		if outputsJSON != "" {

+			var outputs []types.ImageBuildOutput

+			if err := json.Unmarshal([]byte(outputsJSON), &outputs); err != nil {

+				return nil, err

+			}

+			options.Outputs = outputs

+		}

+	}

+

 	return options, nil

 }

@@ -6459,6 +6459,11 @@ paths:

           description: "Target build stage"

           type: "string"

           default: ""

+        - name: "outputs"

+          in: "query"

+          description: "BuildKit output configuration"

+          type: "string"

+          default: ""

       responses:

         200:

           description: "no error"

@@ -187,6 +187,15 @@ type ImageBuildOptions struct {

 	// build request. The same identifier can be used to gracefully cancel the

 	// build with the cancel request.

 	BuildID string

+	// Outputs defines configurations for exporting build results. Only supported

+	// in BuildKit mode

+	Outputs []ImageBuildOutput

+}

+

+// ImageBuildOutput defines configuration for exporting a build result

+type ImageBuildOutput struct {

+	Type  string

+	Attrs map[string]string

 }

 // BuilderVersion sets the version of underlying builder to use

@@ -313,10 +313,25 @@ func (b *Builder) Build(ctx context.Context, opt backend.BuildConfig) (*builder.

 	}

 	frontendAttrs["add-hosts"] = extraHosts

+	exporterName := ""

 	exporterAttrs := map[string]string{}

-	if len(opt.Options.Tags) > 0 {

-		exporterAttrs["name"] = strings.Join(opt.Options.Tags, ",")

+	if len(opt.Options.Outputs) > 1 {

+		return nil, errors.Errorf("multiple outputs not supported")

+	} else if len(opt.Options.Outputs) == 0 {

+		exporterName = "moby"

+	} else {

+		// cacheonly is a special type for triggering skipping all exporters

+		if opt.Options.Outputs[0].Type != "cacheonly" {

+			exporterName = opt.Options.Outputs[0].Type

+			exporterAttrs = opt.Options.Outputs[0].Attrs

+		}

+	}

+

+	if exporterName == "moby" {

+		if len(opt.Options.Tags) > 0 {

+			exporterAttrs["name"] = strings.Join(opt.Options.Tags, ",")

+		}

 	}

 	cache := controlapi.CacheOptions{}

@@ -331,7 +346,7 @@ func (b *Builder) Build(ctx context.Context, opt backend.BuildConfig) (*builder.

 	req := &controlapi.SolveRequest{

 		Ref:           id,

-		Exporter:      "moby",

+		Exporter:      exporterName,

 		ExporterAttrs: exporterAttrs,

 		Frontend:      "dockerfile.v0",

 		FrontendAttrs: frontendAttrs,

@@ -352,6 +367,9 @@ func (b *Builder) Build(ctx context.Context, opt backend.BuildConfig) (*builder.

 		if err != nil {

 			return err

 		}

+		if exporterName != "moby" {

+			return nil

+		}

 		id, ok := resp.ExporterResponse["containerimage.digest"]

 		if !ok {

 			return errors.Errorf("missing image id")

@@ -134,5 +134,13 @@ func (cli *Client) imageBuildOptionsToQuery(options types.ImageBuildOptions) (ur

 		query.Set("buildid", options.BuildID)

 	}

 	query.Set("version", string(options.Version))

+

+	if options.Outputs != nil {

+		outputsJSON, err := json.Marshal(options.Outputs)

+		if err != nil {

+			return query, err

+		}

+		query.Set("outputs", string(outputsJSON))

+	}

 	return query, nil

 }

@@ -65,6 +65,7 @@ keywords: "API, Docker, rcli, REST, documentation"

   back to `shareable` by using `DefaultIpcMode` daemon configuration parameter.

 * `POST /containers/{id}/update` now accepts a `PidsLimit` field to tune a container's

   PID limit. Set `0` or `-1` for unlimited. Leave `null` to not change the current value.

+* `POST /build` now accepts `outputs` key for configuring build outputs when using BuildKit mode.

 ## V1.39 API changes