Add Donut rpc service for sending changes to configuration files

pkg/server/api/api.go

@@ -32,7 +32,10 @@ type Minio struct {
 // New instantiate a new minio API
 func New() Minio {
 	// ignore errors for now
-	d, _ := donut.New()
+	d, err := donut.New()
+	if err != nil {
+		panic(err)
+	}
 	return Minio{
 		OP:    make(chan Operation),
 		Donut: d,

pkg/server/router.go

@@ -115,6 +115,7 @@ func getRPCHandler() http.Handler {
 	s.RegisterService(new(rpc.VersionService), "Version")
 	s.RegisterService(new(rpc.SysInfoService), "SysInfo")
 	s.RegisterService(new(rpc.DiskInfoService), "DiskInfo")
+	s.RegisterService(new(rpc.DonutService), "Donut")
 	// Add new services here
 	return registerRPC(router.NewRouter(), s)
 }

pkg/server/rpc/donut.go

@@ -16,16 +16,22 @@
 
 package rpc
 
-import "net/http"
+import (
+	"net/http"
+
+	"github.com/minio/minio/pkg/donut"
+	"github.com/minio/minio/pkg/iodine"
+)
 
 // DonutService donut service
 type DonutService struct{}
 
 // DonutArgs collections of disks and name to initialize donut
 type DonutArgs struct {
-	MaxSize int64
-	Name    string
-	Disks   []string
+	Name     string
+	MaxSize  uint64
+	Hostname string
+	Disks    []string
 }
 
 // Reply reply for successful or failed Set operation
@@ -34,11 +40,21 @@ type Reply struct {
 	Error   error  `json:"error"`
 }
 
-func setDonutArgs(args *DonutArgs, reply *Reply) error {
+func setDonut(args *DonutArgs, reply *Reply) error {
+	conf := &donut.Config{Version: "0.0.1"}
+	conf.DonutName = args.Name
+	conf.MaxSize = args.MaxSize
+	conf.NodeDiskMap = make(map[string][]string)
+	conf.NodeDiskMap[args.Hostname] = args.Disks
+	if err := donut.SaveConfig(conf); err != nil {
+		return iodine.New(err, nil)
+	}
+	reply.Message = "success"
+	reply.Error = nil
 	return nil
 }
 
 // Set method
 func (s *DonutService) Set(r *http.Request, args *DonutArgs, reply *Reply) error {
-	return setDonutArgs(args, reply)
+	return setDonut(args, reply)
 }