Runtime v2

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

client_opts.go

@@ -23,9 +23,10 @@ import (
 )
 
 type clientOpts struct {
-	defaultns   string
-	services    *services
-	dialOptions []grpc.DialOption
+	defaultns      string
+	defaultRuntime string
+	services       *services
+	dialOptions    []grpc.DialOption
 }
 
 // ClientOpt allows callers to set options on the containerd client
@@ -42,6 +43,14 @@ func WithDefaultNamespace(ns string) ClientOpt {
 	}
 }
 
+// WithDefaultRuntime sets the default runtime on the client
+func WithDefaultRuntime(rt string) ClientOpt {
+	return func(c *clientOpts) error {
+		c.defaultRuntime = rt
+		return nil
+	}
+}
+
 // WithDialOpts allows grpc.DialOptions to be set on the connection
 func WithDialOpts(opts []grpc.DialOption) ClientOpt {
 	return func(c *clientOpts) error {