diff --git a/addons/mysql/scripts/mysql-orchestrator-register.sh b/addons/mysql/scripts/mysql-orchestrator-register.sh
index 00377a3fc..5eaa46373 100644
--- a/addons/mysql/scripts/mysql-orchestrator-register.sh
+++ b/addons/mysql/scripts/mysql-orchestrator-register.sh
@@ -1,17 +1,7 @@
 #!/bin/sh
 set -ex
 
-# meta mysql connection parameters
-# mysql_port="3306"
-# mysql_username="$MYSQL_ROOT_USER"
-# mysql_password="$MYSQL_ROOT_PASSWORD"
-
-# topology_user="$ORC_TOPOLOGY_USER"
-# topology_password="$ORC_TOPOLOGY_PASSWORD"
-
-# component_name="$KB_COMP_NAME"
-
-# register first pod to orchestrator
+# register a mysql instance to orchestrator
 register_to_orchestrator() {
   local host_ip=$1
 
@@ -35,8 +25,6 @@ register_to_orchestrator() {
       exit 1
     fi
 
-    # url for orchestrator to discover this host_ip
-
     # send request to orchestrator for discovery
     response=$(curl -s -o /dev/null -w "%{http_code}" $url)
     if [ $response -eq 200 ]; then
@@ -48,22 +36,11 @@ register_to_orchestrator() {
   echo "register $pod_name ($host_ip) to Orchestrator successful."
 }
 
-# Get the svc list from the environment variable
-# and get the topology information of the current cluster from the orchestrator
-main() {
-
-  if [ -z "$MSYQL_POD_NAME_LIST" ] || [ -z "$MSYQL_POD_HOST_IP_LIST" ]; then
-    echo "Error: Required environment variables MYSQL_POD_NAME_LIST or MSYQL_POD_HOST_IP_LIST are not set."
-    exit 1
-  fi
-
-  old_ifs="$IFS"
-  IFS=','
-  pod_name_list=($MYSQL_POD_NAME_LIST)
-  pod_ip_list=($KB_CLUSTER_COMPONENT_POD_IP_LIST)
-  IFS="$old_ifs"
-  echo "pod_name_list: $pod_name_list"
+# register the first MySQL instance to Orchestrator,
+# and Orchestrator will obtain the entire MySQL cluster topology info from this instance.
+register_first_mysql_instance() {
 
+  # get first MySQL instance host name.
   first_mysql_service_host_name=$(echo "${KB_CLUSTER_COMP_NAME}_MYSQL_0_SERVICE_HOST" | tr '-' '_' | tr '[:lower:]' '[:upper:]')
   first_mysql_service_host=${!first_mysql_service_host_name}
 
@@ -71,6 +48,5 @@ main() {
 
   echo "Initialization script completed！"
 }
-main
 
-echo "completed"
+register_first_mysql_instance