diff --git a/dcs/k8s.go b/dcs/k8s.go
index 19fecba..cfbb4ae 100644
--- a/dcs/k8s.go
+++ b/dcs/k8s.go
@@ -77,12 +77,12 @@ func NewKubernetesStore() (*KubernetesStore, error) {
 
 	clusterName := constant.GetClusterName()
 	if clusterName == "" {
-		return nil, errors.New(fmt.Sprintf("%s must be set", constant.KBEnvClusterName))
+		return nil, errors.New(fmt.Sprintf("%s or %s must be set", constant.EnvClusterName, constant.KBEnvClusterName))
 	}
 
 	componentName := constant.GetComponentName()
 	if componentName == "" {
-		return nil, errors.New(fmt.Sprintf("%s must be set", constant.KBEnvCompName))
+		return nil, errors.New(fmt.Sprintf("%s or %s must be set", constant.EnvComponentName, constant.KBEnvCompName))
 	}
 
 	clusterCompName := constant.GetClusterCompName()
@@ -92,12 +92,12 @@ func NewKubernetesStore() (*KubernetesStore, error) {
 
 	currentMemberName := constant.GetPodName()
 	if currentMemberName == "" {
-		return nil, errors.Wrap(err, "get hostname failed")
+		return nil, errors.New("get hostname failed")
 	}
 
 	namespace := constant.GetNamespace()
 	if namespace == "" {
-		return nil, errors.New("KB_NAMESPACE must be set")
+		return nil, errors.New(fmt.Sprintf("%s or %s must be set", constant.EnvNamespace, constant.KBEnvNamespace))
 	}
 
 	isLeaderClusterWide := false
diff --git a/engines/base.go b/engines/base.go
index 6d521ac..8eb3ade 100644
--- a/engines/base.go
+++ b/engines/base.go
@@ -25,7 +25,6 @@ import (
 
 	"github.com/go-logr/logr"
 	"github.com/pkg/errors"
-	"github.com/spf13/viper"
 
 	"github.com/apecloud/dbctl/constant"
 	"github.com/apecloud/dbctl/dcs"
@@ -53,8 +52,8 @@ func NewDBManagerBase(logger logr.Logger) (*DBManagerBase, error) {
 	mgr := DBManagerBase{
 		CurrentMemberName: currentMemberName,
 		CurrentMemberIP:   constant.GetPodIP(),
-		ClusterCompName:   viper.GetString(constant.KBEnvClusterCompName),
-		Namespace:         viper.GetString(constant.KBEnvNamespace),
+		ClusterCompName:   constant.GetClusterCompName(),
+		Namespace:         constant.GetNamespace(),
 		Logger:            logger,
 	}
 	return &mgr, nil
diff --git a/engines/mongodb/config.go b/engines/mongodb/config.go
index 3bc212a..3f79880 100644
--- a/engines/mongodb/config.go
+++ b/engines/mongodb/config.go
@@ -100,8 +100,8 @@ func NewConfig(properties map[string]string) (*Config, error) {
 		config.Password = viper.GetString(RootPasswordEnv)
 	}
 
-	if viper.IsSet(constant.KBEnvClusterCompName) {
-		config.ReplSetName = viper.GetString(constant.KBEnvClusterCompName)
+	if clusterCompName := constant.GetClusterCompName(); clusterCompName != "" {
+		config.ReplSetName = clusterCompName
 	}
 
 	config.DatabaseName = adminDatabase
diff --git a/go.mod b/go.mod
index b7797d2..e0d3367 100644
--- a/go.mod
+++ b/go.mod
@@ -9,8 +9,6 @@ require (
 	github.com/IBM/sarama v1.43.2
 	github.com/apecloud/kubeblocks v0.9.0
 	github.com/cenkalti/backoff/v4 v4.2.1
-	github.com/deckarep/golang-set/v2 v2.6.0
-	github.com/dlclark/regexp2 v1.11.0
 	github.com/fasthttp/router v1.4.20
 	github.com/go-logr/logr v1.4.2
 	github.com/go-logr/zapr v1.3.0
diff --git a/go.sum b/go.sum
index 5f8873c..35601fd 100644
--- a/go.sum
+++ b/go.sum
@@ -40,12 +40,8 @@ github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSs
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc h1:U9qPSI2PIWSS1VwoXQT9A3Wy9MM3WgvqSxFWenqJduM=
 github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/deckarep/golang-set/v2 v2.6.0 h1:XfcQbWM1LlMB8BsJ8N9vW5ehnnPVIw0je80NsVHagjM=
-github.com/deckarep/golang-set/v2 v2.6.0/go.mod h1:VAky9rY/yGXJOLEDv3OMci+7wtDpOF4IN+y82NBOac4=
 github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f h1:lO4WD4F/rVNCu3HqELle0jiPLLBs70cWOduZpkS1E78=
 github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f/go.mod h1:cuUVRXasLTGF7a8hSLbxyZXjz+1KgoB3wDUb6vlszIc=
-github.com/dlclark/regexp2 v1.11.0 h1:G/nrcoOa7ZXlpoa/91N3X7mM3r8eIlMBBJZvsz/mxKI=
-github.com/dlclark/regexp2 v1.11.0/go.mod h1:DHkYz0B9wPfa6wondMfaivmHpzrQ3v9q8cnmRbL6yW8=
 github.com/dustin/go-humanize v1.0.1 h1:GzkhY7T5VNhEkwH0PVJgjz+fX1rhBrR7pRT3mDkpeCY=
 github.com/dustin/go-humanize v1.0.1/go.mod h1:Mu1zIs6XwVuF/gI1OepvI0qD18qycQx+mFykh5fBlto=
 github.com/eapache/go-resiliency v1.6.0 h1:CqGDTLtpwuWKn6Nj3uNUdflaq+/kIPsg0gfNzHton30=
diff --git a/util/event.go b/util/event.go
index e437afc..34a0358 100644
--- a/util/event.go
+++ b/util/event.go
@@ -24,7 +24,6 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
-	"os"
 	"time"
 
 	"github.com/spf13/viper"
@@ -78,7 +77,7 @@ func CreateEvent(reason string, data map[string]any) (*corev1.Event, error) {
 	podName := constant.GetPodName()
 	podUID := constant.GetPodUID()
 	nodeName := viper.GetString(constant.KBEnvNodeName)
-	namespace := viper.GetString(constant.KBEnvNamespace)
+	namespace := constant.GetNamespace()
 	msg, err := json.Marshal(data)
 	if err != nil {
 		return nil, err
@@ -126,7 +125,7 @@ func SendEvent(ctx context.Context, event *corev1.Event) error {
 		logger.Info("k8s client create failed", "error", err.Error())
 		return err
 	}
-	namespace := os.Getenv(constant.KBEnvNamespace)
+	namespace := constant.GetNamespace()
 	for i := 0; i < 30; i++ {
 		_, err = clientset.CoreV1().Events(namespace).Create(ctx1, event, metav1.CreateOptions{})
 		if err == nil {
diff --git a/util/ping.go b/util/ping.go
index fe1b361..a5fb76d 100644
--- a/util/ping.go
+++ b/util/ping.go
@@ -22,25 +22,8 @@ package util
 import (
 	"net"
 	"time"
-
-	"github.com/spf13/viper"
-	ctlruntime "sigs.k8s.io/controller-runtime"
-
-	"github.com/apecloud/dbctl/constant"
 )
 
-var pingerLogger = ctlruntime.Log.WithName("pinger")
-
-// IsDNSReady checks if dns and ip is ready, it can successfully resolve dns.
-// Since the vast majority of container runtimes currently prohibit the NET_RAW capability,
-// we can't rely on ICMP protocol to detect DNS resolution.
-// Instead, we directly depend on TCP for port detection.
-func IsDNSReady(dns string) (bool, error) {
-	// get the port where the Lorry HTTP service is listening
-	port := viper.GetString("port")
-	return IsTCPReady(dns, port)
-}
-
 func IsTCPReady(host, port string) (bool, error) {
 	address := net.JoinHostPort(host, port)
 	timeout := 2 * time.Second
@@ -54,40 +37,3 @@ func IsTCPReady(host, port string) (bool, error) {
 
 	return true, nil
 }
-
-func CheckDNSReadyWithRetry(dns string, times int) (bool, error) {
-	var ready bool
-	var err error
-	for i := 0; i < times; i++ {
-		ready, err = IsDNSReady(dns)
-		if err == nil && ready {
-			return true, nil
-		}
-	}
-	pingerLogger.Info("dns resolution is ready", "dns", dns)
-	return ready, err
-}
-
-// WaitForDNSReady checks if dns is ready
-func WaitForDNSReady(dns string) {
-	pingerLogger.Info("Waiting for dns resolution to be ready")
-	isPodReady, err := IsDNSReady(dns)
-	for err != nil || !isPodReady {
-		if err != nil {
-			pingerLogger.Info("dns check failed", "error", err.Error())
-		}
-		time.Sleep(3 * time.Second)
-		isPodReady, err = IsDNSReady(dns)
-	}
-	pingerLogger.Info("dns resolution is ready", "dns", dns)
-}
-
-// WaitForPodReady checks if pod is ready
-func WaitForPodReady(checkPodHeadless bool) {
-	domain := viper.GetString(constant.KBEnvPodFQDN)
-	WaitForDNSReady(domain)
-	if checkPodHeadless {
-		domain := viper.GetString(constant.KBEnvPodName)
-		WaitForDNSReady(domain)
-	}
-}