fix custom config parameter bugs (#81)

pkg/util/config/config.go

@@ -21,6 +21,7 @@ import (
 	"bytes"
 	"fmt"
 	"regexp"
+	"sort"
 	"strings"
 )
 
@@ -66,8 +67,14 @@ func AppendCustomConfig(data string, custom map[string]string) string {
 	if len(custom) > 0 {
 		_, _ = b.WriteString("\n########## Custom ##########\n")
 	}
-	for k, v := range custom {
-		_, _ = b.WriteString(fmt.Sprintf("--%s=%s\n", k, v))
+
+	var sortedKeys []string
+	for k := range custom {
+		sortedKeys = append(sortedKeys, k)
+	}
+	sort.Strings(sortedKeys)
+	for _, k := range sortedKeys {
+		_, _ = b.WriteString(fmt.Sprintf("--%s=%s\n", k, custom[k]))
 	}
 
 	return b.String()

pkg/util/config/config_test.go

@@ -99,6 +99,35 @@ func TestAppendCustomConfig(t *testing.T) {
 
 ########## Custom ##########
 --enable_optimizer=true
+`,
+		},
+		{
+			name: "multi custom parameter not in template",
+			data: template,
+			custom: map[string]string{
+				"enable_optimizer":     "true",
+				"max_log_size":         "100",
+				"logtostderr":          "true",
+				"log_dir":              "logs",
+				"symbolize_stacktrace": "false",
+			},
+			want: `
+########## authorization ##########
+# Enable authorization
+--enable_authorize=false
+
+########## Authentication ##########
+# User login authentication type, password for nebula authentication, ldap for ldap authentication, cloud for cloud authentication
+--auth_type=password
+
+--rocksdb_compression_per_level=
+
+########## Custom ##########
+--enable_optimizer=true
+--log_dir=logs
+--logtostderr=true
+--max_log_size=100
+--symbolize_stacktrace=false
 `,
 		},
 	}