Add --device flag to ctr

Closes #3066

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

cmd/ctr/commands/commands.go

@@ -126,6 +126,10 @@ var (
 			Name:  "memory-limit",
 			Usage: "memory limit (in bytes) for the container",
 		},
+		cli.StringSliceFlag{
+			Name:  "device",
+			Usage: "add a device to a container",
+		},
 	}
 	// ImageDecryptionFlags are cli flags needed when decrypting an image
 	ImageDecryptionFlags = []cli.Flag{

cmd/ctr/commands/run/run_unix.go

@@ -155,6 +155,9 @@ func NewContainer(ctx gocontext.Context, client *containerd.Client, context *cli
 		if limit != 0 {
 			opts = append(opts, oci.WithMemoryLimit(limit))
 		}
+		for _, dev := range context.StringSlice("device") {
+			opts = append(opts, oci.WithLinuxDevice(dev, "rwm"))
+		}
 	}
 
 	cOpts = append(cOpts, containerd.WithRuntime(context.String("runtime"), nil))