use hex encode

Signed-off-by: 童剑 <[email protected]>

pkg/core/basic_cluster.go

@@ -16,6 +16,7 @@ package core
 
 import (
 	"bytes"
+	"encoding/json"
 
 	"github.com/tikv/pd/pkg/core/constant"
 )
@@ -156,6 +157,15 @@ type KeyRange struct {
 	EndKey   []byte `json:"end-key"`
 }
 
+// MarshalJSON marshals to json.
+func (kr KeyRange) MarshalJSON() ([]byte, error) {
+	m := map[string]string{
+		"start-key": HexRegionKeyStr(kr.StartKey),
+		"end-key":   HexRegionKeyStr(kr.EndKey),
+	}
+	return json.Marshal(m)
+}
+
 // NewKeyRange create a KeyRange with the given start key and end key.
 func NewKeyRange(startKey, endKey string) KeyRange {
 	return KeyRange{

tools/pd-ctl/tests/scheduler/scheduler_test.go

@@ -15,7 +15,6 @@
 package scheduler_test
 
 import (
-	"encoding/base64"
 	"encoding/json"
 	"fmt"
 	"reflect"
@@ -554,8 +553,8 @@ func (suite *schedulerTestSuite) checkSchedulerConfig(cluster *pdTests.TestClust
 	})
 	re.Equal(float64(time.Hour.Nanoseconds()), conf["timeout"])
 	ranges := conf["ranges"].([]any)[0].(map[string]any)
-	re.Equal(base64.StdEncoding.EncodeToString([]byte("a")), ranges["start-key"])
-	re.Equal(base64.StdEncoding.EncodeToString([]byte("b")), ranges["end-key"])
+	re.Equal(core.HexRegionKeyStr([]byte("a")), ranges["start-key"])
+	re.Equal(core.HexRegionKeyStr([]byte("b")), ranges["end-key"])
 
 	echo = mustExec(re, cmd, []string{"-u", pdAddr, "scheduler", "add", "balance-range-scheduler", "--format=raw", "tiflash", "learner", "a", "b"}, nil)
 	re.Contains(echo, "400")