label num limits to 6; key length limits to 128 (#146)

diff --git a/.github/workflows/static_check.yml b/.github/workflows/static_check.yml
index 61406aa..a12019a 100644
--- a/.github/workflows/static_check.yml
+++ b/.github/workflows/static_check.yml
@@ -16,7 +16,7 @@
       uses: actions/checkout@v1
 
     - name: Build
-      run: go build -v .
+      run: go build -v github.com/apache/servicecomb-kie/cmd/kieserver
 
     - name: Fmt
       run: |
diff --git a/pkg/model/db_schema.go b/pkg/model/db_schema.go
index caae854..4d6fe50 100644
--- a/pkg/model/db_schema.go
+++ b/pkg/model/db_schema.go
@@ -42,7 +42,7 @@
 	CreateTime     int64  `json:"create_time,omitempty" bson:"create_time," yaml:"create_time,omitempty"`
 	UpdateTime     int64  `json:"update_time,omitempty" bson:"update_time," yaml:"update_time,omitempty"`
 
-	Labels map[string]string `json:"labels,omitempty" yaml:"labels,omitempty" validate:"max=8,dive,keys,lableKV,endkeys,lableKV"` //redundant
+	Labels map[string]string `json:"labels,omitempty" yaml:"labels,omitempty" validate:"max=6,dive,keys,labelKV,endkeys,labelKV"` //redundant
 	Domain string            `json:"domain,omitempty" yaml:"domain,omitempty" validate:"commonName"`                              //redundant
 }
 
@@ -90,7 +90,7 @@
 	Project string            `json:"project,omitempty" yaml:"project,omitempty" validate:"commonName"`
 	Domain  string            `json:"domain,omitempty" yaml:"domain,omitempty" validate:"commonName"` //redundant
 	Key     string            `json:"key" yaml:"key" validate:"getKey"`
-	Labels  map[string]string `json:"labels,omitempty" yaml:"labels,omitempty" validate:"max=8,dive,keys,lableKV,endkeys,lableKV"` //redundant
+	Labels  map[string]string `json:"labels,omitempty" yaml:"labels,omitempty" validate:"max=8,dive,keys,labelKV,endkeys,labelKV"` //redundant
 	Offset  int64             `validate:"min=0"`
 	Limit   int64             `validate:"min=0,max=100"`
 	Status  string            `json:"status,omitempty" yaml:"status,omitempty" validate:"kvStatus"`
diff --git a/pkg/validate/instance.go b/pkg/validate/instance.go
index 963b5ee..a55499d 100644
--- a/pkg/validate/instance.go
+++ b/pkg/validate/instance.go
@@ -11,13 +11,13 @@
 // custom validate rules
 // please use different tag names from third party tags
 var customRules = []*RegexValidateRule{
-	NewRule(key, commonNameRegexString, &Option{Min: 1, Max: 512}), //0.5K
-	NewRule("getKey", commonNameRegexString, &Option{Max: 512}),    //0.5K
+	NewRule(key, commonNameRegexString, &Option{Min: 1, Max: 128}),
+	NewRule("getKey", commonNameRegexString, &Option{Max: 128}),
 	NewRule("commonName", commonNameRegexString, &Option{Min: 1, Max: 256}),
 	NewRule("valueType", `^$|^(ini|json|text|yaml|properties)$`, nil),
 	NewRule("kvStatus", `^$|^(enabled|disabled)$`, nil),
 	NewRule("value", asciiRegexString, &Option{Max: 2097152}), //ASCII, 2M
-	NewRule("lableKV", commonNameRegexString, &Option{Max: 32}),
+	NewRule("labelKV", commonNameRegexString, &Option{Max: 32}),
 	NewRule("check", asciiRegexString, &Option{Max: 1048576}), //ASCII, 1M
 }
 
diff --git a/pkg/validate/instance_test.go b/pkg/validate/instance_test.go
index 1876c4b..8cc0952 100644
--- a/pkg/validate/instance_test.go
+++ b/pkg/validate/instance_test.go
@@ -11,10 +11,7 @@
 
 func TestValidate(t *testing.T) {
 	string32 := "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" //32
-	string512 := "a"
-	for i := 0; i < 9; i++ { //512
-		string512 = string512 + string512
-	}
+	string128 := string32 + string32 + string32 + string32
 	err := validate.Init()
 	assert.NoError(t, err)
 
@@ -37,7 +34,7 @@
 	assert.Error(t, validate.Validate(kvDoc))
 
 	kvDoc = &model.KVDoc{Project: "a", Domain: "a",
-		Key:   string512 + "a",
+		Key:   string128 + "a",
 		Value: "a",
 	}
 	assert.Error(t, validate.Validate(kvDoc))