diff --git a/conf.sample.yml b/conf.sample.yml
index 31ba6d5..d410988 100644
--- a/conf.sample.yml
+++ b/conf.sample.yml
@@ -2,7 +2,7 @@
 ### dtm can be run without any config.
 ### all config in this file is optional. the default value is as specified in each line
 ### all configs can be specified from env. for example:
-### Store.MaxOpenConns can also specified from env: STORE_MAX_OPEN_CONNS
+### MicroService.EndPoint => MICRO_SERVICE_END_POINT
 #####################################################################
 
 # Store: # specify which engine to store trans status
@@ -49,4 +49,5 @@
 # RetryInterval: 10 # the subtrans branch will be retried after this interval
 
 # LogLevel: 'info' # default: info. can be debug|info|warn|error
-
+# HttpPort: 36789
+# GrpcPort: 36790
diff --git a/dtmcli/logger/log.go b/dtmcli/logger/log.go
index 81466b3..5fb0a03 100644
--- a/dtmcli/logger/log.go
+++ b/dtmcli/logger/log.go
@@ -13,7 +13,7 @@ import (
 var logger Logger = nil
 
 func init() {
-	InitLog("info")
+	InitLog(os.Getenv("LOG_LEVEL"))
 }
 
 // Logger logger interface
diff --git a/dtmsvr/config/config_utils.go b/dtmsvr/config/config_utils.go
index 3d37b0c..f588eee 100644
--- a/dtmsvr/config/config_utils.go
+++ b/dtmsvr/config/config_utils.go
@@ -49,9 +49,12 @@ func loadFromEnvInner(prefix string, conf reflect.Value, defaultValue string) {
 
 func toUnderscoreUpper(key string) string {
 	key = strings.Trim(key, "_")
+	matchLastCap := regexp.MustCompile("([A-Z])([A-Z][a-z])")
+	s2 := matchLastCap.ReplaceAllString(key, "${1}_${2}")
+
 	matchFirstCap := regexp.MustCompile("([a-z])([A-Z]+)")
-	s2 := matchFirstCap.ReplaceAllString(key, "${1}_${2}")
-	// logger.Debugf("loading from env: %s", strings.ToUpper(s2))
+	s2 = matchFirstCap.ReplaceAllString(s2, "${1}_${2}")
+	// logger.Infof("loading from env: %s", strings.ToUpper(s2))
 	return strings.ToUpper(s2)
 }