build: add cgroup-parent support

Signed-off-by: CrazyMax <crazy-max@users.noreply.github.com>

build/build.go

@@ -55,6 +55,7 @@ type Options struct {
 	BuildArgs    map[string]string
 	CacheFrom    []client.CacheOptionsEntry
 	CacheTo      []client.CacheOptionsEntry
+	CgroupParent string
 	Exports      []client.ExportEntry
 	ExtraHosts   []string
 	ImageIDFile  string
@@ -399,6 +400,10 @@ func toSolveOpt(ctx context.Context, d driver.Driver, multiDriver bool, opt Opti
 		AllowedEntitlements: opt.Allow,
 	}
 
+	if opt.CgroupParent != "" {
+		so.FrontendAttrs["cgroup-parent"] = opt.CgroupParent
+	}
+
 	if v, ok := opt.BuildArgs["BUILDKIT_MULTI_PLATFORM"]; ok {
 		if v, _ := strconv.ParseBool(v); v {
 			so.FrontendAttrs["multi-platform"] = "true"

commands/build.go

@@ -37,6 +37,7 @@ type buildOptions struct {
 	buildArgs    []string
 	cacheFrom    []string
 	cacheTo      []string
+	cgroupParent string
 	extraHosts   []string
 	imageIDFile  string
 	labels       []string
@@ -287,6 +288,9 @@ func buildCmd(dockerCli command.Cli, rootOpts *rootOptions) *cobra.Command {
 
 	flags.StringArrayVar(&options.cacheTo, "cache-to", []string{}, "Cache export destinations (e.g., `user/app:cache`, `type=local,dest=path/to/dir`)")
 
+	flags.StringVar(&options.cgroupParent, "cgroup-parent", "", "Optional parent cgroup for the container")
+	flags.SetAnnotation("cgroup-parent", "docs.external.url", []string{"https://docs.docker.com/engine/reference/commandline/build/#use-a-custom-parent-cgroup---cgroup-parent"})
+
 	flags.StringVarP(&options.dockerfileName, "file", "f", "", "Name of the Dockerfile (default: `PATH/Dockerfile`)")
 	flags.SetAnnotation("file", "docs.external.url", []string{"https://docs.docker.com/engine/reference/commandline/build/#specify-a-dockerfile--f"})
 
@@ -326,10 +330,6 @@ func buildCmd(dockerCli command.Cli, rootOpts *rootOptions) *cobra.Command {
 	var ignoreBool bool
 	var ignoreInt int64
 
-	flags.StringVar(&ignore, "cgroup-parent", "", "Optional parent cgroup for the container")
-	flags.MarkHidden("cgroup-parent")
-	//flags.SetAnnotation("cgroup-parent", "flag-warn", []string{"cgroup-parent is not implemented."})
-
 	flags.BoolVar(&ignoreBool, "compress", false, "Compress the build context using gzip")
 	flags.MarkHidden("compress")
 

docs/reference/buildx_build.md

@@ -21,6 +21,7 @@ Start a build
 | `--builder string` | Override the configured builder instance |
 | [`--cache-from stringArray`](#cache-from) | External cache sources (e.g., `user/app:cache`, `type=local,src=path/to/dir`) |
 | [`--cache-to stringArray`](#cache-to) | Cache export destinations (e.g., `user/app:cache`, `type=local,dest=path/to/dir`) |
+| [`--cgroup-parent string`](https://docs.docker.com/engine/reference/commandline/build/#use-a-custom-parent-cgroup---cgroup-parent) | Optional parent cgroup for the container |
 | [`-f`](https://docs.docker.com/engine/reference/commandline/build/#specify-a-dockerfile--f), [`--file string`](https://docs.docker.com/engine/reference/commandline/build/#specify-a-dockerfile--f) | Name of the Dockerfile (default: `PATH/Dockerfile`) |
 | `--iidfile string` | Write the image ID to the file |
 | `--label stringArray` | Set metadata for an image |