diff --git a/README.md b/README.md
index a403ba7b..066a9162 100644
--- a/README.md
+++ b/README.md
@@ -9,4 +9,3 @@
 
 1. 实现`gobay.Extension`
 2. 每一个ext目录都是你的例子
-3. ext读取配置的规则请参考这个[issue](https://github.com/shanbay/gobay/issues/8#issuecomment-558023666)
diff --git a/app.go b/app.go
index 21d91e90..7f023d57 100644
--- a/app.go
+++ b/app.go
@@ -6,6 +6,7 @@ import (
 	"io/ioutil"
 	"os"
 	"path/filepath"
+	"strings"
 	"sync"
 
 	"github.com/spf13/viper"
@@ -151,3 +152,18 @@ func CreateApp(rootPath string, env string, exts map[Key]Extension) (*Applicatio
 	}
 	return app, nil
 }
+
+func GetConfigByPrefix(config *viper.Viper, prefix string, trimPrefix bool) *viper.Viper {
+	subConfig := viper.New()
+	for k, v := range config.AllSettings() {
+		if !strings.HasPrefix(k, prefix) {
+			continue
+		}
+		key := k
+		if trimPrefix {
+			key = k[len(prefix):]
+		}
+		subConfig.SetDefault(key, v)
+	}
+	return subConfig
+}
diff --git a/asynctaskext/asynctaskext.go b/asynctaskext/asynctaskext.go
index 49da1017..89d30ac6 100644
--- a/asynctaskext/asynctaskext.go
+++ b/asynctaskext/asynctaskext.go
@@ -1,6 +1,7 @@
 package asynctaskext
 
 import (
+	"errors"
 	"os"
 
 	"github.com/RichardKnop/machinery/v1"
@@ -30,11 +31,12 @@ func (t *AsyncTaskExt) Application() *gobay.Application {
 }
 
 func (t *AsyncTaskExt) Init(app *gobay.Application) error {
+	if t.NS == "" {
+		return errors.New("lack of NS")
+	}
 	t.app = app
 	config := app.Config()
-	if t.NS != "" {
-		config = config.Sub(t.NS)
-	}
+	config = gobay.GetConfigByPrefix(config, t.NS, true)
 	t.config = &machineryConfig.Config{}
 	if err := config.Unmarshal(t.config, func(config *mapstructure.
 		DecoderConfig) {
diff --git a/asynctaskext/asynctaskext_test.go b/asynctaskext/asynctaskext_test.go
index 1882aeac..0b6f8735 100644
--- a/asynctaskext/asynctaskext_test.go
+++ b/asynctaskext/asynctaskext_test.go
@@ -16,9 +16,9 @@ var (
 )
 
 func init() {
-	task = AsyncTaskExt{NS: "asynctask"}
+	task = AsyncTaskExt{NS: "asynctask_"}
 
-	app, _ = gobay.CreateApp(
+	app, _ := gobay.CreateApp(
 		"../testdata",
 		"testing",
 		map[gobay.Key]gobay.Extension{
@@ -44,15 +44,15 @@ func TestPushConsume(t *testing.T) {
 		Name: "add",
 		Args: []tasks.Arg{
 			{
-				Type: "int64",
+				Type:  "int64",
 				Value: 1,
 			},
 			{
-				Type: "int64",
+				Type:  "int64",
 				Value: 2,
 			},
 			{
-				Type: "int64",
+				Type:  "int64",
 				Value: 3,
 			},
 		},
diff --git a/busext/amqp.go b/busext/amqp.go
index f4c7e224..794cb822 100644
--- a/busext/amqp.go
+++ b/busext/amqp.go
@@ -59,11 +59,12 @@ func (b *BusExt) Application() *gobay.Application {
 }
 
 func (b *BusExt) Init(app *gobay.Application) error {
-	b.app = app
-	b.config = app.Config()
-	if b.NS != "" {
-		b.config = b.config.Sub(b.NS)
+	if b.NS == "" {
+		return errors.New("lack of NS")
 	}
+	b.app = app
+	config := app.Config()
+	b.config = gobay.GetConfigByPrefix(config, b.NS, true)
 	setDefaultConfig(b.config)
 	b.consumers = make(map[string]Handler)
 	b.consumeChannels = make(map[string]<-chan amqp.Delivery)
diff --git a/busext/amqp_test.go b/busext/amqp_test.go
index 24f37f16..d85cd99a 100644
--- a/busext/amqp_test.go
+++ b/busext/amqp_test.go
@@ -16,7 +16,7 @@ var (
 )
 
 func init() {
-	bus = BusExt{NS: "bus"}
+	bus = BusExt{NS: "bus_"}
 
 	app, _ = gobay.CreateApp(
 		"../testdata",
diff --git a/cachext/backend/redis/redis.go b/cachext/backend/redis/redis.go
index 7f79063a..855cf9c2 100644
--- a/cachext/backend/redis/redis.go
+++ b/cachext/backend/redis/redis.go
@@ -20,9 +20,9 @@ type redisBackend struct {
 }
 
 func (b *redisBackend) Init(config *viper.Viper) error {
-	host := config.GetString("cache_host")
-	password := config.GetString("cache_password")
-	dbNum := config.GetInt("cache_db")
+	host := config.GetString("host")
+	password := config.GetString("password")
+	dbNum := config.GetInt("db")
 	redisClient := redis.NewClient(&redis.Options{
 		Addr:     host,
 		Password: password,
diff --git a/cachext/ext.go b/cachext/ext.go
index 1b09820d..3970466d 100644
--- a/cachext/ext.go
+++ b/cachext/ext.go
@@ -47,6 +47,9 @@ type CacheBackend interface {
 
 // Init init a cache extension
 func (c *CacheExt) Init(app *gobay.Application) error {
+	if c.NS == "" {
+		return errors.New("lack of NS")
+	}
 	mu.Lock()
 	defer mu.Unlock()
 
@@ -57,11 +60,9 @@ func (c *CacheExt) Init(app *gobay.Application) error {
 	c.cachedFuncName = make(map[string]void)
 	config := app.Config()
 	c.enableApm = config.GetBool("elastic_apm_enable")
-	if c.NS != "" {
-		config = config.Sub(c.NS)
-	}
-	c.prefix = config.GetString("cache_prefix")
-	backendConfig := config.GetString("cache_backend")
+	config = gobay.GetConfigByPrefix(config, c.NS, true)
+	c.prefix = config.GetString("prefix")
+	backendConfig := config.GetString("backend")
 	if backend, exist := backendMap[backendConfig]; exist {
 		c.backend = backend
 		if err := c.backend.Init(config); err != nil {
diff --git a/cachext/ext_test.go b/cachext/ext_test.go
index 233809a2..32287161 100644
--- a/cachext/ext_test.go
+++ b/cachext/ext_test.go
@@ -12,7 +12,7 @@ import (
 )
 
 func ExampleCacheExt_Set() {
-	cache := &cachext.CacheExt{}
+	cache := &cachext.CacheExt{NS: "cache_"}
 	exts := map[gobay.Key]gobay.Extension{
 		"cache": cache,
 	}
@@ -33,7 +33,7 @@ func ExampleCacheExt_Set() {
 }
 
 func ExampleCacheExt_Cached() {
-	cache := &cachext.CacheExt{}
+	cache := &cachext.CacheExt{NS: "cache_"}
 	exts := map[gobay.Key]gobay.Extension{
 		"cache": cache,
 	}
@@ -70,7 +70,7 @@ func ExampleCacheExt_Cached() {
 }
 
 func ExampleCacheExt_SetMany() {
-	cache := &cachext.CacheExt{}
+	cache := &cachext.CacheExt{NS: "cache_"}
 	exts := map[gobay.Key]gobay.Extension{
 		"cache": cache,
 	}
@@ -98,7 +98,7 @@ func ExampleCacheExt_SetMany() {
 }
 
 func TestCacheExt_Operation(t *testing.T) {
-	cache := &cachext.CacheExt{}
+	cache := &cachext.CacheExt{NS: "cache_"}
 	exts := map[gobay.Key]gobay.Extension{
 		"cache": cache,
 	}
@@ -223,7 +223,7 @@ func TestCacheExt_Operation(t *testing.T) {
 
 func TestCacheExt_Cached_Common(t *testing.T) {
 	// 准备数据
-	cache := &cachext.CacheExt{}
+	cache := &cachext.CacheExt{NS: "cache_"}
 	exts := map[gobay.Key]gobay.Extension{
 		"cache": cache,
 	}
@@ -412,7 +412,7 @@ func TestCacheExt_Cached_Common(t *testing.T) {
 
 func TestCacheExt_Cached_Struct(t *testing.T) {
 	// 准备数据
-	cache := &cachext.CacheExt{}
+	cache := &cachext.CacheExt{NS: "cache_"}
 	exts := map[gobay.Key]gobay.Extension{
 		"cache": cache,
 	}
@@ -461,7 +461,7 @@ func TestCacheExt_Cached_Struct(t *testing.T) {
 }
 
 func Benchmark_SetMany(b *testing.B) {
-	cache := &cachext.CacheExt{}
+	cache := &cachext.CacheExt{NS: "cache_"}
 	exts := map[gobay.Key]gobay.Extension{
 		"cache": cache,
 	}
@@ -487,7 +487,7 @@ func Benchmark_SetMany(b *testing.B) {
 }
 
 func Benchmark_GetMany(b *testing.B) {
-	cache := &cachext.CacheExt{}
+	cache := &cachext.CacheExt{NS: "cache_"}
 	exts := map[gobay.Key]gobay.Extension{
 		"cache": cache,
 	}
@@ -530,7 +530,7 @@ func Benchmark_GetMany(b *testing.B) {
 }
 
 func Benchmark_Cached(b *testing.B) {
-	cache := &cachext.CacheExt{}
+	cache := &cachext.CacheExt{NS: "cache_"}
 	exts := map[gobay.Key]gobay.Extension{
 		"cache": cache,
 	}
diff --git a/entext/ext.go b/entext/ext.go
index 0fa9ba7e..48ba4dea 100644
--- a/entext/ext.go
+++ b/entext/ext.go
@@ -2,6 +2,7 @@ package entext
 
 import (
 	"database/sql"
+	"errors"
 	"github.com/facebookincubator/ent/dialect"
 	entsql "github.com/facebookincubator/ent/dialect/sql"
 	"github.com/shanbay/gobay"
@@ -32,15 +33,15 @@ func (d *EntExt) Object() interface{} { return d.client }
 func (d *EntExt) Application() *gobay.Application { return d.app }
 
 func (d *EntExt) Init(app *gobay.Application) error {
-	d.app = app
-	config := app.Config()
-	if d.NS != "" {
-		config = config.Sub(d.NS)
+	if d.NS == "" {
+		return errors.New("lack of NS")
 	}
+	d.app = app
+	config := gobay.GetConfigByPrefix(app.Config(), d.NS, true)
 	config.SetDefault("max_open_conns", defaultMaxOpenConns)
 	config.SetDefault("max_idle_conns", defaultMaxIdleConns)
-	dbURL := config.GetString("db_url")
-	dbDriver := config.GetString("db_driver")
+	dbURL := config.GetString("url")
+	dbDriver := config.GetString("driver")
 
 	var db *sql.DB
 	var err error
diff --git a/entext/ext_test.go b/entext/ext_test.go
index d5bdb415..0da050d1 100644
--- a/entext/ext_test.go
+++ b/entext/ext_test.go
@@ -15,7 +15,7 @@ var entclient *ent.Client
 func setup() func() error {
 	exts := map[gobay.Key]gobay.Extension{
 		"entext": &EntExt{
-			NS: "ent",
+			NS: "db_",
 			NewClient: func(drvopt interface{}) Client {
 				return ent.NewClient(drvopt.(ent.Option))
 			},
diff --git a/esapmext/ext.go b/esapmext/ext.go
index 09b8119a..c82cb525 100644
--- a/esapmext/ext.go
+++ b/esapmext/ext.go
@@ -25,8 +25,7 @@ func (e *EsApmExt) Application() *gobay.Application {
 
 // https://www.elastic.co/guide/en/apm/agent/go/current/configuration.html
 func (e *EsApmExt) Init(app *gobay.Application) error {
-
-	config := app.Config()
+	config := gobay.GetConfigByPrefix(app.Config(), "elastic_", false)
 	if !config.GetBool("elastic_apm_enable") {
 		return nil
 	}
diff --git a/go.sum b/go.sum
index 48668a0c..7001574c 100644
--- a/go.sum
+++ b/go.sum
@@ -469,7 +469,9 @@ go.elastic.co/apm/module/apmgoredis v1.6.0 h1:E/4nyzB8yo1zX1BduAzFpvs/45fq8csMXZ
 go.elastic.co/apm/module/apmgoredis v1.6.0/go.mod h1:2A858ngLiX0/IqNEPPLoUVXT5v527UK0MD7JMEVrWJM=
 go.elastic.co/apm/module/apmgorm v1.6.0 h1:E1CANwa6+xdRUwMBSqgYILIK1mvrFzqIsW/6QYJXjsk=
 go.elastic.co/apm/module/apmgorm v1.6.0/go.mod h1:pnpRtjjQ7CJbq9c3OIIcpDq1vbumitJQFhKvOUkSbdw=
+go.elastic.co/apm/module/apmgrpc v1.6.0 h1:LRJO/C2yxCTKSr3FW/0TxLzBW68dBQNm8XX/cq53OdU=
 go.elastic.co/apm/module/apmgrpc v1.6.0/go.mod h1:OnV9gT0x24g6R7w/eHIS8CFgRgJGvNUWRIrS3Qtd4Jk=
+go.elastic.co/apm/module/apmhttp v1.6.0 h1:Y67VwDNnUyq4akeiem8Wtpb222RbZCRfY3FBI0swoJk=
 go.elastic.co/apm/module/apmhttp v1.6.0/go.mod h1:pf6GS5vDxdrSF0Qy6wESRBZCRZqATSZpr658ehD5QA4=
 go.elastic.co/apm/module/apmsql v1.6.0 h1:0vMQDYFtA7G6QgGai38CmYY5ki9Q6g/ub/jCQp8/7qU=
 go.elastic.co/apm/module/apmsql v1.6.0/go.mod h1:cmMxjn6l+tjYM9+/sYnlhyGOFcj5Ye+P2NW2yslp/N8=
diff --git a/gormext/ext.go b/gormext/ext.go
deleted file mode 100644
index e73a81e3..00000000
--- a/gormext/ext.go
+++ /dev/null
@@ -1,66 +0,0 @@
-package gormext
-
-import (
-	"github.com/jinzhu/gorm"
-	_ "github.com/jinzhu/gorm/dialects/mysql"
-	"github.com/shanbay/gobay"
-	"go.elastic.co/apm/module/apmgorm"
-	_ "go.elastic.co/apm/module/apmsql/mysql"
-)
-
-// GormExt gorm extention
-type GormExt struct {
-	NS        string
-	app       *gobay.Application
-	db        *gorm.DB
-	enableApm bool
-}
-
-// Init implements Extension interface
-func (d *GormExt) Init(app *gobay.Application) error {
-	d.app = app
-	config := app.Config()
-	d.enableApm = config.GetBool("elastic_apm_enable")
-	if d.NS != "" {
-		config = config.Sub(d.NS)
-	}
-	dbURL := config.GetString("db_url")
-	dbDriver := config.GetString("db_driver")
-	var db *gorm.DB
-	var err error
-	if d.enableApm {
-		db, err = apmgorm.Open(dbDriver, dbURL)
-	} else {
-		db, err = gorm.Open(dbDriver, dbURL)
-	}
-	if err != nil {
-		return err
-	}
-	sqldb := db.DB()
-	if config.IsSet("conn_max_lifetime") {
-		sqldb.SetConnMaxLifetime(config.GetDuration("conn_max_lifetime"))
-	}
-	if config.IsSet("max_open_conns") {
-		sqldb.SetMaxOpenConns(config.GetInt("max_open_conns"))
-	}
-	if config.IsSet("max_idle_conns") {
-		sqldb.SetMaxIdleConns(config.GetInt("max_idle_conns"))
-	}
-	d.db = db
-	return nil
-}
-
-// Close implements Extension interface
-func (d *GormExt) Close() error {
-	return d.db.Close()
-}
-
-// Object implements Extension interface
-func (d *GormExt) Object() interface{} {
-	return d.db
-}
-
-// Application implements Extension interface
-func (d *GormExt) Application() *gobay.Application {
-	return d.app
-}
diff --git a/redisext/ext.go b/redisext/ext.go
index 852ab39c..bd9a8506 100644
--- a/redisext/ext.go
+++ b/redisext/ext.go
@@ -1,6 +1,7 @@
 package redisext
 
 import (
+	"errors"
 	"github.com/go-redis/redis"
 	"github.com/shanbay/gobay"
 )
@@ -16,14 +17,14 @@ var _ gobay.Extension = (*RedisExt)(nil)
 
 // Init
 func (c *RedisExt) Init(app *gobay.Application) error {
-	c.app = app
-	config := app.Config()
-	if c.NS != "" {
-		config = config.Sub(c.NS)
+	if c.NS == "" {
+		return errors.New("lack of NS")
 	}
-	host := config.GetString("redis_host")
-	password := config.GetString("redis_password")
-	dbNum := config.GetInt("redis_db")
+	c.app = app
+	config := gobay.GetConfigByPrefix(app.Config(), c.NS, true)
+	host := config.GetString("host")
+	password := config.GetString("password")
+	dbNum := config.GetInt("db")
 	c.client = redis.NewClient(&redis.Options{
 		Addr:     host,
 		Password: password,
diff --git a/sentryext/ext.go b/sentryext/ext.go
index 548d3070..97a8e55e 100644
--- a/sentryext/ext.go
+++ b/sentryext/ext.go
@@ -4,21 +4,24 @@ import (
 	"errors"
 	"github.com/getsentry/sentry-go"
 	"github.com/shanbay/gobay"
+	"github.com/spf13/viper"
 )
 
 // SentryExt sentry OpenAPI extension
 type SentryExt struct {
-	NS  string
-	app *gobay.Application
+	NS     string
+	app    *gobay.Application
+	config *viper.Viper
 }
 
 // Init implements Extension interface
 func (d *SentryExt) Init(app *gobay.Application) error {
-	d.app = app
-	config := app.Config()
-	if d.NS != "" {
-		config = config.Sub(d.NS)
+	if d.NS == "" {
+		return errors.New("lack of NS")
 	}
+	d.app = app
+	config := gobay.GetConfigByPrefix(app.Config(), d.NS, true)
+	d.config = config
 	co := sentry.ClientOptions{}
 	if err := config.Unmarshal(&co); err != nil {
 		return err
@@ -46,3 +49,6 @@ func (d *SentryExt) Object() interface{} {
 func (d *SentryExt) Application() *gobay.Application {
 	return d.app
 }
+
+// Config get subConfig
+func (d *SentryExt) Config() *viper.Viper { return d.config }
diff --git a/sentryext/grpc/mw_test.go b/sentryext/grpc/mw_test.go
index 8f9b96d2..bd6743f7 100644
--- a/sentryext/grpc/mw_test.go
+++ b/sentryext/grpc/mw_test.go
@@ -29,7 +29,7 @@ type recoveryAssertService struct {
 }
 
 func init() {
-	sentry_extension = sentryext.SentryExt{NS: "sentry"}
+	sentry_extension = sentryext.SentryExt{NS: "sentry_"}
 	app, err := gobay.CreateApp(
 		"../../testdata",
 		"testing",
diff --git a/sentryext/openapi/mw.go b/sentryext/openapi/mw.go
index 394776dd..87450678 100644
--- a/sentryext/openapi/mw.go
+++ b/sentryext/openapi/mw.go
@@ -7,7 +7,7 @@ import (
 )
 
 func GetMiddleWare(d *sentryext.SentryExt) (middleware.Builder, error) {
-	config := d.Application().Config().Sub(d.NS)
+	config := d.Config()
 	o := sentryhttp.Options{}
 	if err := config.Unmarshal(&o); err != nil {
 		return nil, err
diff --git a/sentryext/openapi/mw_test.go b/sentryext/openapi/mw_test.go
index b9701151..d2c9ce3b 100644
--- a/sentryext/openapi/mw_test.go
+++ b/sentryext/openapi/mw_test.go
@@ -16,7 +16,7 @@ var handler = http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 })
 
 func init() {
-	sentry_extension = sentryext.SentryExt{NS: "sentry"}
+	sentry_extension = sentryext.SentryExt{NS: "sentry_"}
 
 	app, err := gobay.CreateApp(
 		"../../testdata",
diff --git a/seqgenext/ext.go b/seqgenext/ext.go
index dcff860c..fc321e92 100644
--- a/seqgenext/ext.go
+++ b/seqgenext/ext.go
@@ -9,6 +9,7 @@ package seqgenext
 '0000000010110101100111101101011000010111010001100000000000000000'
 */
 import (
+	"errors"
 	"fmt"
 	"sync"
 
@@ -47,10 +48,10 @@ type SequenceGeneratorExt struct {
 
 // Init implements Extension interface
 func (d *SequenceGeneratorExt) Init(app *gobay.Application) error {
-	config := app.Config()
-	if d.NS != "" {
-		config = config.Sub(d.NS)
+	if d.NS == "" {
+		return errors.New("lack of NS")
 	}
+	config := gobay.GetConfigByPrefix(app.Config(), d.NS, true)
 	d.app = app
 	d.SequenceBase = config.GetUint64("sequence_base")
 	d.SequenceKey = config.GetString("sequence_key")
diff --git a/stubext/ext.go b/stubext/ext.go
index c5ecad2f..cca7e46e 100644
--- a/stubext/ext.go
+++ b/stubext/ext.go
@@ -58,6 +58,9 @@ func (d *StubExt) Object() interface{} { return d }
 func (d *StubExt) Close() error { return d.conn.Close() }
 
 func (d *StubExt) Init(app *gobay.Application) error {
+	if d.NS == "" {
+		return errors.New("lack of NS")
+	}
 	// init from default
 	d.ConnTimeout = defaultConnTimeout
 	d.CallTimeout = defaultCallTimeout
@@ -72,9 +75,7 @@ func (d *StubExt) Init(app *gobay.Application) error {
 	d.app = app
 	config := app.Config()
 	d.enableApm = config.GetBool("elastic_apm_enable")
-	if d.NS != "" {
-		config = config.Sub(d.NS)
-	}
+	config = gobay.GetConfigByPrefix(config, d.NS, true)
 	if err := config.Unmarshal(d); err != nil {
 		return err
 	}
diff --git a/stubext/ext_test.go b/stubext/ext_test.go
index f69d7eef..e116b4d7 100644
--- a/stubext/ext_test.go
+++ b/stubext/ext_test.go
@@ -20,7 +20,7 @@ var (
 
 func setupStub(env string) {
 	stubext = StubExt{
-		NS:          "stub_health",
+		NS:          "stub_health_",
 		DailOptions: []grpc.DialOption{grpc.WithInsecure(), grpc.WithBlock()},
 		NewClientFuncs: map[string]NewClientFunc{
 			"health": func(conn *grpc.ClientConn) interface{} {
diff --git a/testdata/config.yaml b/testdata/config.yaml
index bc0846c3..3c42f386 100644
--- a/testdata/config.yaml
+++ b/testdata/config.yaml
@@ -1,52 +1,46 @@
-bus: &bus
-  broker_url: "amqp://guest:guest@127.0.0.1:5672/"
-  reconnect_delay: "2s"
-  reinit_delay: "1s"
-  exhanges:
+defaults: &defaults
+  bus_broker_url: "amqp://guest:guest@127.0.0.1:5672/"
+  bus_reconnect_delay: "2s"
+  bus_reinit_delay: "1s"
+  bus_exhanges:
     - sbay-exchange
-  queues:
+  bus_queues:
     - test
-  resend_delay: "1s"
-  publish_retry: 3
-  prefetch: 10
-  quit_consumer_on_empty_queue: false
-  bindings:
+  bus_resend_delay: "1s"
+  bus_publish_retry: 3
+  bus_prefetch: 10
+  bus_quit_consumer_on_empty_queue: false
+  bus_bindings:
     - exchange: sbay-exchange
       queue: test
       binding_key: buses.oc.post_order_paid
-stub_health: &stub_health
-  host: '127.0.0.1'
-  port: 5555
-  authority: 'health-rpc.xyz'
-  metadata:
+
+  stub_health_host: '127.0.0.1'
+  stub_health_port: 5555
+  stub_health_authority: 'health-rpc.xyz'
+  stub_health_metadata:
     svc_auth_token: 'abcdefg'
-  conntimeout: 1s
-  calltimeout: 300ms
-  retrybackoff: 50ms
-  retrytimes: 3
+  stub_health_conntimeout: 1s
+  stub_health_calltimeout: 300ms
+  stub_health_retrybackoff: 50ms
+  stub_health_retrytimes: 3
 
-asynctask: &asynctask
-  concurrency: 10
-  broker: "redis://127.0.0.1:6379/8"
-  default_queue: "gobay.task"
-  result_backend: "redis://127.0.0.1:6379/8"
-  results_expire_in: 1
-  redis: {}
+  asynctask_concurrency: 10
+  asynctask_broker: "redis://127.0.0.1:6379/8"
+  asynctask_default_queue: "gobay.task"
+  asynctask_result_backend: "redis://127.0.0.1:6379/8"
+  asynctask_results_expire_in: 1
+  asynctask_redis: {}
 
-defaults: &defaults
   db_driver: sqlite3
   db_url: ":memory:"
+
   short_url_alphabet: "mn6j2c4rv8bpygw95z7hsdaetxuk3fq"
-  asynctask:
-    <<: *asynctask
-  bus:
-    <<: *bus
-  sentry:
-    dsn: "http://user:pass@127.0.0.1/5"
-    environment: "default"
-    repanic: true
-  stub_health:
-    <<: *stub_health
+
+  sentry_dsn: "http://user:pass@127.0.0.1/5"
+  sentry_environment: "default"
+  sentry_repanic: true
+
   cache_backend: "memory"
   cache_prefix: "github"
   cache_host: "127.0.0.1:6379"
@@ -54,39 +48,18 @@ defaults: &defaults
   cache_db: 3
 testing:
   <<: *defaults
-  bus:
-    <<: *bus
-  stub_health:
-    <<: *stub_health
-  ent:
-    db_driver: mysql
-    db_url: "root:@(127.0.0.1:3306)/gobay?charset=utf8mb4&parseTime=true"
+  db_driver: mysql
+  db_url: "root:@(127.0.0.1:3306)/gobay?charset=utf8mb4&parseTime=true"
 grpclong:
   <<: *defaults
-  bus:
-    <<: *bus
-  stub_health:
-    <<: *stub_health
-    retrybackoff: 300ms
+  stub_health_retrybackoff: 300ms
 grpcnoretry:
   <<: *defaults
-  bus:
-    <<: *bus
-  stub_health:
-    <<: *stub_health
-    retrytimes: 0
+  stub_health_retrytimes: 0
 grpcmocked:
   <<: *defaults
-  bus:
-    <<: *bus
-  stub_health:
-    <<: *stub_health
-    mocked: true
+  stub_health_mocked: true
 development:
   <<: *defaults
-  stub_health:
-    <<: *stub_health
 production:
   <<: *defaults
-  stub_health:
-    <<: *stub_health