Add Namespace flag (#21)

* added http-namespace to the flagset

* update description

* added namespace option to the options list

* added namespace as a config parameter

* updated docs

* fix default value override

pkg/server/http/option.go

@@ -14,11 +14,12 @@ type Option func(o *Options)
 
 // Options defines the available options for this package.
 type Options struct {
-	Logger  log.Logger
-	Context context.Context
-	Config  *config.Config
-	Metrics *metrics.Metrics
-	Flags   []cli.Flag
+	Logger    log.Logger
+	Context   context.Context
+	Config    *config.Config
+	Metrics   *metrics.Metrics
+	Flags     []cli.Flag
+	Namespace string
 }
 
 // newOptions initializes the available default options.
@@ -66,3 +67,10 @@ func Flags(val []cli.Flag) Option {
 		o.Flags = append(o.Flags, val...)
 	}
 }
+
+// Namespace provides a function to set the Namespace option.
+func Namespace(val string) Option {
+	return func(o *Options) {
+		o.Namespace = val
+	}
+}

pkg/server/http/server.go

@@ -14,7 +14,7 @@ func Server(opts ...Option) (http.Service, error) {
 
 	service := http.NewService(
 		http.Logger(options.Logger),
-		http.Namespace("go.micro.web"),
+		http.Namespace(options.Config.HTTP.Namespace),
 		http.Name("graph"),
 		http.Version(version.String),
 		http.Address(options.Config.HTTP.Addr),