Add cdi.enabled option to runtime configure

Signed-off-by: Evan Lezar <elezar@nvidia.com>

CHANGELOG.md

@@ -9,6 +9,7 @@
 * Added detection of libnvdxgdmal.so.1 on WSL2.
 * Fix bug in determining default nvidia-container-runtime.user config value on SUSE-based systems.
 * Add `crun` to the list of configured low-level runtimes.
+* Add `--cdi.enabled` option to `nvidia-ctk runtime configure` command to enable CDI in containerd.
 
 * [toolkit-container] Bump CUDA base image version to 12.3.1.
 * [libnvidia-container] Added detection of libnvdxgdmal.so.1 on WSL2.

cmd/nvidia-ctk/runtime/configure/configure.go

@@ -71,6 +71,11 @@ type config struct {
 		hookPath     string
 		setAsDefault bool
 	}
+
+	// cdi-specific options
+	cdi struct {
+		enabled bool
+	}
 }
 
 func (m command) build() *cli.Command {
@@ -141,6 +146,11 @@ func (m command) build() *cli.Command {
 			Usage:       "set the NVIDIA runtime as the default runtime",
 			Destination: &config.nvidiaRuntime.setAsDefault,
 		},
+		&cli.BoolFlag{
+			Name:        "cdi.enabled",
+			Usage:       "Enable CDI in the configured runtime",
+			Destination: &config.cdi.enabled,
+		},
 	}
 
 	return &configure
@@ -175,6 +185,13 @@ func (m command) validateFlags(c *cli.Context, config *config) error {
 		}
 	}
 
+	if config.runtime != "containerd" {
+		if config.cdi.enabled {
+			m.logger.Warningf("Ignoring cdi.enabled flag for %v", config.runtime)
+		}
+		config.cdi.enabled = false
+	}
+
 	return nil
 }
 
@@ -227,6 +244,12 @@ func (m command) configureConfigFile(c *cli.Context, config *config) error {
 		return fmt.Errorf("unable to update config: %v", err)
 	}
 
+	if config.cdi.enabled {
+		if err := cfg.Set("enable_cdi", true); err != nil {
+			return fmt.Errorf("failed enable CDI in containerd: %w", err)
+		}
+	}
+
 	outputPath := config.getOuputConfigPath()
 	n, err := cfg.Save(outputPath)
 	if err != nil {

pkg/config/engine/api.go

@@ -20,6 +20,7 @@ package engine
 type Interface interface {
 	DefaultRuntime() string
 	AddRuntime(string, string, bool) error
+	Set(string, interface{}) error
 	RemoveRuntime(string) error
 	Save(string) (int64, error)
 }

pkg/config/engine/containerd/config_v1.go

@@ -134,6 +134,14 @@ func (c *ConfigV1) RemoveRuntime(name string) error {
 	return nil
 }
 
+// SetOption sets the specified containerd option.
+func (c *ConfigV1) Set(key string, value interface{}) error {
+	config := *c.Tree
+	config.SetPath([]string{"plugins", "cri", "containerd", key}, value)
+	*c.Tree = config
+	return nil
+}
+
 // Save wrotes the config to a file
 func (c ConfigV1) Save(path string) (int64, error) {
 	return (Config)(c).Save(path)

pkg/config/engine/containerd/config_v2.go

@@ -90,6 +90,14 @@ func (c *Config) getRuntimeAnnotations(path []string) ([]string, error) {
 	return annotations, nil
 }
 
+// Set sets the specified containerd option.
+func (c *Config) Set(key string, value interface{}) error {
+	config := *c.Tree
+	config.SetPath([]string{"plugins", "io.containerd.grpc.v1.cri", key}, value)
+	*c.Tree = config
+	return nil
+}
+
 // DefaultRuntime returns the default runtime for the cri-o config
 func (c Config) DefaultRuntime() string {
 	if runtime, ok := c.GetPath([]string{"plugins", "io.containerd.grpc.v1.cri", "containerd", "default_runtime_name"}).(string); ok {

pkg/config/engine/crio/crio.go

@@ -99,6 +99,11 @@ func (c *Config) RemoveRuntime(name string) error {
 	return nil
 }
 
+// Set is not supported for cri-o configs.
+func (c *Config) Set(key string, value interface{}) error {
+	return fmt.Errorf("Set is not supported for crio configs")
+}
+
 // Save writes the config to the specified path
 func (c Config) Save(path string) (int64, error) {
 	config := (toml.Tree)(c)

pkg/config/engine/docker/docker.go

@@ -114,6 +114,11 @@ func (c *Config) RemoveRuntime(name string) error {
 	return nil
 }
 
+// Set is not supported for docker configs.
+func (c *Config) Set(key string, value interface{}) error {
+	return fmt.Errorf("Set is not supported for crio configs")
+}
+
 // Save writes the config to the specified path
 func (c Config) Save(path string) (int64, error) {
 	output, err := json.MarshalIndent(c, "", "    ")