refactor(core): select discovery backend from configured type

pkg/common/discovery/discoveryregister.go

@@ -21,7 +21,7 @@ import (
 
 	"github.com/openimsdk/open-im-server/v3/pkg/common/config"
 	"github.com/openimsdk/tools/discovery"
-	"github.com/openimsdk/tools/discovery/inprocess"
+	"github.com/openimsdk/tools/discovery/standalone"
 	"github.com/openimsdk/tools/utils/runtimeenv"
 
 	"github.com/openimsdk/tools/discovery/kubernetes"
@@ -33,17 +33,24 @@ import (
 // NewDiscoveryRegister creates a new service discovery and registry client based on the provided environment type.
 func NewDiscoveryRegister(discovery *config.Discovery, watchNames []string) (discovery.SvcDiscoveryRegistry, error) {
 	if config.Standalone() {
-		return inprocess.GetSvcDiscoveryRegistry(), nil
+		return standalone.GetSvcDiscoveryRegistry(), nil
 	}
-	if runtimeenv.RuntimeEnvironment() == config.KUBERNETES {
+
+	runtimeEnvironment := runtimeenv.RuntimeEnvironment()
+	discoveryType := discovery.Enable
+	if discoveryType == "" && runtimeEnvironment == config.KUBERNETES {
+		discoveryType = config.KUBERNETES
+	}
+	if discoveryType == config.KUBERNETES && runtimeEnvironment != config.KUBERNETES {
+		return nil, errs.New("unsupported discovery type", "type", discoveryType).Wrap()
+	}
+	switch discoveryType {
+	case config.KUBERNETES:
 		return kubernetes.NewConnManager(discovery.Kubernetes.Namespace, nil,
 			grpc.WithDefaultCallOptions(
 				grpc.MaxCallSendMsgSize(1024*1024*20),
 			),
 		)
-	}
-
-	switch discovery.Enable {
 	case config.ETCD:
 		return etcd.NewSvcDiscoveryRegistry(
 			discovery.Etcd.RootDirectory,
@@ -53,6 +60,6 @@ func NewDiscoveryRegister(discovery *config.Discovery, watchNames []string) (dis
 			etcd.WithMaxCallSendMsgSize(20*1024*1024),
 			etcd.WithUsernameAndPassword(discovery.Etcd.Username, discovery.Etcd.Password))
 	default:
-		return nil, errs.New("unsupported discovery type", "type", discovery.Enable).Wrap()
+		return nil, errs.New("unsupported discovery type", "type", discoveryType).Wrap()
 	}
 }