diff --git a/config/secrets b/config/secrets
index cbceeaa..86d5235 160000
--- a/config/secrets
+++ b/config/secrets
@@ -1 +1 @@
-Subproject commit cbceeaaba7de5fa1c944732d2223759fe4a44d2a
+Subproject commit 86d5235eec346b56210117b54ffa79590383d579
diff --git a/environment/prod/main.tf b/environment/prod/main.tf
index 4ea1a90..23f952d 100644
--- a/environment/prod/main.tf
+++ b/environment/prod/main.tf
@@ -28,6 +28,7 @@ module "prod_stack" {
   db_instance_type                    = var.db_ec2_instance_type
   db_ami_id                           = var.db_ec2_ami_id
   db_subnet_id                        = var.db_ec2_subnet_id
+  db_private_ip                       = var.db_ec2_private_ip
   db_data_volume_size                 = var.db_data_volume_size
 
   # 보안 그룹 규칙
diff --git a/environment/prod/variables.tf b/environment/prod/variables.tf
index f300e67..bc8ec26 100644
--- a/environment/prod/variables.tf
+++ b/environment/prod/variables.tf
@@ -33,6 +33,11 @@ variable "db_ec2_subnet_id" {
   type        = string
 }
 
+variable "db_ec2_private_ip" {
+  description = "DB EC2에 고정할 Private IP (db_ec2_subnet_id 의 CIDR 안에 있어야 합니다)"
+  type        = string
+}
+
 variable "db_data_volume_size" {
   description = "DB EC2 MySQL data volume 크기 (GiB)"
   type        = number
diff --git a/modules/app_stack/db_ec2.tf b/modules/app_stack/db_ec2.tf
index c575e86..fbfccb4 100644
--- a/modules/app_stack/db_ec2.tf
+++ b/modules/app_stack/db_ec2.tf
@@ -44,6 +44,8 @@ resource "aws_instance" "db_server" {
   ami           = var.db_ami_id
   instance_type = var.db_instance_type
   subnet_id     = var.db_subnet_id
+  # 인스턴스를 교체해도 Parameter Store 의 datasource 주소와 API 서버 설정을 그대로 쓰도록 주소를 고정합니다.
+  private_ip = var.db_private_ip
 
   vpc_security_group_ids = [
     aws_security_group.db_ec2_sg[count.index].id,
diff --git a/modules/app_stack/variables.tf b/modules/app_stack/variables.tf
index 890b234..647d3e7 100644
--- a/modules/app_stack/variables.tf
+++ b/modules/app_stack/variables.tf
@@ -36,6 +36,12 @@ variable "db_subnet_id" {
   default     = null
 }
 
+variable "db_private_ip" {
+  description = "DB EC2에 고정할 Private IP. 인스턴스를 교체해도 같은 주소를 유지해 datasource 설정을 바꾸지 않기 위해 사용합니다"
+  type        = string
+  default     = null
+}
+
 variable "db_data_volume_size" {
   description = "DB EC2 MySQL data volume 크기 (GiB)"
   type        = number