Add nvidia Opts to lookup containerd binary or hook path

This is for consumers like Docker that manage a `docker-containerd`.

Signed-off-by: Michael Crosby <crosbymichael@gmail.com>

contrib/nvidia/nvidia.go

@@ -60,9 +60,12 @@ func WithGPUs(opts ...Opts) oci.SpecOpts {
 				return err
 			}
 		}
-		path, err := exec.LookPath("containerd")
+		if c.OCIHookPath == "" {
-		if err != nil {
+			path, err := exec.LookPath("containerd")
-			return err
+			if err != nil {
+				return err
+			}
+			c.OCIHookPath = path
 		}
 		nvidiaPath, err := exec.LookPath(nvidiaCLI)
 		if err != nil {
@@ -72,7 +75,7 @@ func WithGPUs(opts ...Opts) oci.SpecOpts {
 			s.Hooks = &specs.Hooks{}
 		}
 		s.Hooks.Prestart = append(s.Hooks.Prestart, specs.Hook{
-			Path: path,
+			Path: c.OCIHookPath,
 			Args: append([]string{
 				"containerd",
 				"oci-hook",
@@ -92,6 +95,7 @@ type config struct {
 	LDCache      string
 	LDConfig     string
 	Requirements []string
+	OCIHookPath  string
 }
 
 func (c *config) args() []string {
@@ -181,3 +185,23 @@ func WithRequiredCUDAVersion(major, minor int) Opts {
 		return nil
 	}
 }
+
+// WithOCIHookPath sets the hook path for the binary
+func WithOCIHookPath(path string) Opts {
+	return func(c *config) error {
+		c.OCIHookPath = path
+		return nil
+	}
+}
+
+// WithLookupOCIHookPath sets the hook path for the binary via a binary name
+func WithLookupOCIHookPath(name string) Opts {
+	return func(c *config) error {
+		path, err := exec.LookPath(name)
+		if err != nil {
+			return err
+		}
+		c.OCIHookPath = path
+		return nil
+	}
+}