report meta engine and storage type together with usage (#504)

pkg/meta/interface.go

@@ -167,6 +167,8 @@ type Session struct {
 
 // Meta is a interface for a meta service for file system.
 type Meta interface {
+	// Name of database
+	Name() string
 	// Init is used to initialize a meta service.
 	Init(format Format, force bool) error
 	// Load loads the existing setting of a formatted volume from meta service.

pkg/meta/redis.go

@@ -166,6 +166,10 @@ func newRedisMeta(url string, conf *Config) (Meta, error) {
 	return m, nil
 }
 
+func (r *redisMeta) Name() string {
+	return "redis"
+}
+
 func (r *redisMeta) Init(format Format, force bool) error {
 	body, err := r.rdb.Get(Background, "setting").Bytes()
 	if err != nil && err != redis.Nil {

pkg/meta/sql.go

@@ -183,6 +183,10 @@ func newSQLMeta(driver, dsn string, conf *Config) (*dbMeta, error) {
 	return m, nil
 }
 
+func (m *dbMeta) Name() string {
+	return m.engine.DriverName()
+}
+
 func (m *dbMeta) Init(format Format, force bool) error {
 	if err := m.engine.Sync2(new(setting), new(counter)); err != nil {
 		logger.Fatalf("create table setting, counter: %s", err)

pkg/usage/usage.go

@@ -39,6 +39,8 @@ type usage struct {
 	UsedInodes int64  `json:"usedInodes"`
 	Version    string `json:"version"`
 	Uptime     int64  `json:"uptime"`
+	MetaEngine string `json:"metaEngine"` // type of meta engine
+	DataStore  string `json:"dataStore"`  // type of object store
 }
 
 func sendUsage(u usage) error {
@@ -72,7 +74,9 @@ func ReportUsage(m meta.Meta, version string) {
 	var u usage
 	if format, err := m.Load(); err == nil {
 		u.VolumeID = format.UUID
+		u.DataStore = format.Storage
 	}
+	u.MetaEngine = m.Name()
 	u.SessionID = int64(rand.Uint32())
 	u.Version = version
 	var start = time.Now()