add http listen addr to config (#230)

* go fmt

* add HTTPAddr to config to allow configuring listen address

pubsub/pubsub.go

@@ -5,8 +5,8 @@ import (
 
 	"golang.org/x/net/context"
 
-	"github.com/sirupsen/logrus"
 	"github.com/golang/protobuf/proto"
+	"github.com/sirupsen/logrus"
 )
 
 // Log is the structured logger used throughout the package.

server/config.go

@@ -56,6 +56,8 @@ type Config struct {
 	// no access logging will be done.
 	RPCAccessLog *string `envconfig:"RPC_ACCESS_LOG"`
 
+	// HTTPAddr is the address the server implementation will bind to.
+	HTTPAddr string `envconfig:"HTTP_ADDR"`
 	// HTTPPort is the port the server implementation will serve HTTP over.
 	HTTPPort int `envconfig:"HTTP_PORT"`
 	// RPCPort is the port the server implementation will serve RPC over.

server/kit/config.go

@@ -40,6 +40,9 @@ type Config struct {
 	// GOMAXPROCS can be used to override the default GOMAXPROCS.
 	GOMAXPROCS int `envconfig:"GIZMO_GOMAXPROCS"`
 
+	// HTTPAddr is the address the server implementation will bind to.
+	// The default is "" (bind to all interfaces)
+	HTTPAddr string `envconfig:"HTTP_ADDR"`
 	// HTTPPort is the port the server implementation will serve HTTP over.
 	// The default is 8080
 	HTTPPort int `envconfig:"HTTP_PORT"`

server/kit/kitserver.go

@@ -148,7 +148,7 @@ func NewServer(svc Service) *Server {
 	}
 	s.svr = &http.Server{
 		Handler:        &ochttp.Handler{Handler: s, Propagation: propr},
-		Addr:           fmt.Sprintf(":%d", cfg.HTTPPort),
+		Addr:           fmt.Sprintf("%s:%d", cfg.HTTPAddr, cfg.HTTPPort),
 		MaxHeaderBytes: cfg.MaxHeaderBytes,
 		ReadTimeout:    cfg.ReadTimeout,
 		WriteTimeout:   cfg.WriteTimeout,

server/simple_server.go

@@ -137,7 +137,7 @@ func (s *SimpleServer) Start() error {
 
 	srv := httpServer(wrappedHandler)
 
-	l, err := net.Listen("tcp", fmt.Sprintf(":%d", s.cfg.HTTPPort))
+	l, err := net.Listen("tcp", fmt.Sprintf("%s:%d", s.cfg.HTTPAddr, s.cfg.HTTPPort))
 	if err != nil {
 		return err
 	}