Use registry.options.Context to set Consul TCP check option

registry/consul/options.go

@@ -2,6 +2,7 @@ package consul
 
 import (
 	"context"
+	"time"
 
 	consul "github.com/hashicorp/consul/api"
 	"github.com/micro/go-micro/registry"
@@ -15,3 +16,23 @@ func Config(c *consul.Config) registry.Option {
 		o.Context = context.WithValue(o.Context, "consul_config", c)
 	}
 }
+
+//
+// RegisterTCPCheck will tell the service provider to check the service address
+// and port every `t` interval. It will enabled only if `t` is greater than 0.
+// See `TCP + Interval` for more information [1].
+//
+// [1] https://www.consul.io/docs/agent/checks.html
+//
+func RegisterTCPCheck(t time.Duration) registry.Option {
+	return func(o *registry.Options) {
+		if t <= time.Duration(0) {
+			return
+		}
+		if o.Context == nil {
+			o.Context = context.Background()
+		}
+		o.Context = context.WithValue(o.Context,
+			registry.ConsulRegisterTCPCheckKey, t)
+	}
+}