allow multi gpu to be specified via ctr

Signed-off-by: Michael Crosby <michael@thepasture.io>

cmd/ctr/commands/commands.go

@@ -147,7 +147,7 @@ var (
 			Name:  "pid-file",
 			Usage: "file path to write the task's pid",
 		},
-		cli.IntFlag{
+		cli.IntSliceFlag{
 			Name:  "gpus",
 			Usage: "add gpus to the container",
 		},

cmd/ctr/commands/run/run_unix.go

@@ -250,7 +250,7 @@ func NewContainer(ctx gocontext.Context, client *containerd.Client, context *cli
 			}))
 		}
 		if context.IsSet("gpus") {
-			opts = append(opts, nvidia.WithGPUs(nvidia.WithDevices(context.Int("gpus")), nvidia.WithAllCapabilities))
+			opts = append(opts, nvidia.WithGPUs(nvidia.WithDevices(context.IntSlice("gpus")...), nvidia.WithAllCapabilities))
 		}
 		if context.IsSet("allow-new-privs") {
 			opts = append(opts, oci.WithNewPrivileges)