diff --git a/.github/workflows/Backend-CD.yml b/.github/workflows/Backend-CD.yml
index c133841..c49e44b 100644
--- a/.github/workflows/Backend-CD.yml
+++ b/.github/workflows/Backend-CD.yml
@@ -249,6 +249,7 @@ jobs:
             HEALTH_PORT="${{ env.HEALTH_CHECK_PORT }}"
             NET="${{ env.DOCKER_NETWORK }}"
             ENV_FILE="/tmp/relife.env"
+            DOCKER_PROJECT_DIR="/dockerProjects/relife_app"
 
             echo "🔹 Use image: ${IMAGE}"
             if ! docker pull "${IMAGE}"; then
@@ -317,21 +318,28 @@ jobs:
             # ---------------------------------------------------------
             # 4) green 역할 컨테이너 재기동
             #    - 같은 네트워크 상에서 NPM이 컨테이너명:PORT로 프록시하므로 -p 불필요
+            #    - 호스트 볼륨 마운트로 Blue/Green 간 데이터 영속성 보장
             # ---------------------------------------------------------
             docker rm -f "${GREEN}" >/dev/null 2>&1 || true
+
+            # 볼륨 디렉토리 생성 (없으면)
+            mkdir -p ${DOCKER_PROJECT_DIR}/{data,logs}
+
             echo "🚀 run new container → ${GREEN}"
             docker run -d --name "${GREEN}" \
               --restart unless-stopped \
               --network "${NET}" \
               --env-file "${ENV_FILE}" \
               -e TZ=Asia/Seoul \
+              -v ${DOCKER_PROJECT_DIR}/data:/app/data \
+              -v ${DOCKER_PROJECT_DIR}/logs:/app/logs \
               "${IMAGE}"
 
             # ---------------------------------------------------------
             # 5) 헬스체크 (/actuator/health/readiness 200 OK까지 대기)
             # ---------------------------------------------------------
             echo "⏱ health-check: ${GREEN}"
-            TIMEOUT=120
+            TIMEOUT=180
             INTERVAL=3
             ELAPSED=0
             sleep 8  # 초기 부팅 여유
@@ -350,7 +358,7 @@ jobs:
             
             if [[ "${CODE:-000}" != "200" ]]; then
               echo "❌ ${GREEN} health failed"
-              docker logs --tail=200 "${GREEN}" || true
+              docker logs --tail=300 "${GREEN}" || true
               docker rm -f "${GREEN}" || true
               exit 1;
             fi
@@ -371,7 +379,7 @@ jobs:
             else
               echo "❌ Failed to switch upstream! Received HTTP status code: ${HTTP_CODE}"
               # [수정] 전환 실패 시, 새로 띄운 Green 컨테이너는 즉시 제거하고 실패 처리
-              docker logs --tail=200 "${GREEN}" || true
+              docker logs --tail=300 "${GREEN}" || true
               docker rm -f "${GREEN}" || true
               exit 1
             fi
diff --git a/back/docker-compose-dev.yml b/back/docker-compose-dev.yml
index dd0d312..36c8510 100644
--- a/back/docker-compose-dev.yml
+++ b/back/docker-compose-dev.yml
@@ -14,7 +14,7 @@ services:
     environment:
       TZ: "Asia/Seoul"
     volumes:
-      - /dockerProjects/redis_1/volumes/data:/data
+      - ~/dockerProjects/redis_1/volumes/data:/data
 
 networks:
   common:
diff --git a/infra/aws/terraform/cloudfront.tf b/infra/aws/terraform/cloudfront.tf
index 672a6df..e742851 100644
--- a/infra/aws/terraform/cloudfront.tf
+++ b/infra/aws/terraform/cloudfront.tf
@@ -31,6 +31,7 @@ resource "aws_cloudfront_distribution" "cloudfront_distribution" {
     cached_methods         = ["GET", "HEAD"]
     target_origin_id       = "S3-${aws_s3_bucket.s3_1.id}"
     viewer_protocol_policy = "redirect-to-https"
+    compress               = true  # Gzip/Brotli 압축 활성화
 
     forwarded_values {
       query_string = false
@@ -39,10 +40,10 @@ resource "aws_cloudfront_distribution" "cloudfront_distribution" {
       }
     }
 
-    # 캐시 설정
+    # 캐시 설정 - 정적 리소스는 길게
     min_ttl     = 0
-    default_ttl = 86400
-    max_ttl     = 31536000
+    default_ttl = 86400    # 1일
+    max_ttl     = 31536000 # 1년
   }
 
   restrictions {
@@ -51,9 +52,22 @@ resource "aws_cloudfront_distribution" "cloudfront_distribution" {
     }
   }
 
+  # 존재하지 않는 오브젝트 요청 시
   custom_error_response {
-    error_caching_min_ttl = 600
     error_code            = 404
+    error_caching_min_ttl = 300  # 5분 (에러 캐싱으로 Origin 부하 감소)
+  }
+
+  # 권한 없음 에러 (예: S3 퍼미션 문제)
+  custom_error_response {
+    error_code            = 403
+    error_caching_min_ttl = 120
+  }
+
+  # S3 서비스 장애 시
+  custom_error_response {
+    error_code            = 503
+    error_caching_min_ttl = 10
   }
 
   # 과금 정책
@@ -62,15 +76,15 @@ resource "aws_cloudfront_distribution" "cloudfront_distribution" {
   # PriceClass_All: 전세계
   price_class = "PriceClass_100"
 
-  # fixme: CDN 도메인 설정
-  # aliases = [var.cdn_domain]
+  # CDN 도메인 설정
+  aliases = [var.cdn_domain]
 
   viewer_certificate {
-    cloudfront_default_certificate = true
-    # fixme: ACM 인증서 사용(CDN 도메인 설정) 시 아래 주석 해제
-    # acm_certificate_arn = aws_acm_certificate.cdn_domain_cert.arn
-    # ssl_support_method = "sni-only"
-    # minimum_protocol_version = "TLSv1.2_2021"
+    # cloudfront_default_certificate = true
+    # ACM 인증서 사용(CDN 도메인 설정) 시 아래 주석 해제
+    acm_certificate_arn = aws_acm_certificate_validation.cdn_domain_cert_validation.certificate_arn
+    ssl_support_method = "sni-only"
+    minimum_protocol_version = "TLSv1.2_2021"
   }
 
   tags = merge(local.common_tags, {
@@ -82,17 +96,26 @@ resource "aws_cloudfront_distribution" "cloudfront_distribution" {
 # ACM 인증서
 ##################
 # CloudFront는 us-east-1 리전에 있어야 함
-# fixme: CDN 도메인 설정 시 주석 해제
-# resource "aws_acm_certificate" "cdn_domain_cert" {
-#   provider = "us-east-1"
-#   domain_name = var.cdn_domain
-#   validation_method = "DNS"
-#
-#   lifecycle {
-#     create_before_destroy = true
-#   }
-#
-#   tags = merge(local.common_tags, {
-#     Name = "${var.prefix}-cdn-domain-cert"
-#   })
-# }
\ No newline at end of file
+resource "aws_acm_certificate" "cdn_domain_cert" {
+  provider          = aws.us_east_1
+  domain_name       = var.cdn_domain
+  key_algorithm     = "EC_prime256v1"
+  validation_method = "DNS"
+
+  lifecycle {
+    create_before_destroy = true
+  }
+
+  tags = merge(local.common_tags, {
+    Name = "${var.prefix}-cdn-domain-cert"
+  })
+}
+
+resource "aws_acm_certificate_validation" "cdn_domain_cert_validation" {
+  provider = aws.us_east_1
+  certificate_arn = aws_acm_certificate.cdn_domain_cert.arn
+
+  timeouts {
+    create = "1h"
+  }
+}
\ No newline at end of file
diff --git a/infra/aws/terraform/ec2.tf b/infra/aws/terraform/ec2.tf
index 96e8631..79046d2 100644
--- a/infra/aws/terraform/ec2.tf
+++ b/infra/aws/terraform/ec2.tf
@@ -110,9 +110,10 @@ resource "aws_instance" "ec2_1" {
 
   # 루트 볼륨 설정
   root_block_device {
-    volume_type = "gp2"
-    volume_size = 30 # 볼륨 크기를 30GB로 설정
-    encrypted   = true
+    volume_type           = "gp2"
+    volume_size           = 30 # 볼륨 크기를 30GB로 설정
+    encrypted             = true
+    delete_on_termination = false
   }
 
   user_data = local.ec2_user_data
diff --git a/infra/aws/terraform/main.tf b/infra/aws/terraform/main.tf
index d87aa6d..6bbb283 100644
--- a/infra/aws/terraform/main.tf
+++ b/infra/aws/terraform/main.tf
@@ -1,5 +1,5 @@
 ########################################################
-# 마지막 수정: 251001
+# 마지막 수정: 251010
 # 작성자: gooraeng
 #
 # AWS 인프라를 코드로 관리하기 위한 Terraform 메인 설정 파일
@@ -29,6 +29,12 @@ provider "aws" {
   region = var.region
 }
 
+# CloudFront는 us-east-1 리전의 ACM 인증서가 필요
+provider "aws" {
+  alias  = "us_east_1"
+  region = "us-east-1"
+}
+
 ################
 # 로컬 변수
 ################
diff --git a/infra/aws/terraform/outputs.tf b/infra/aws/terraform/outputs.tf
index 58f1a45..3945af3 100644
--- a/infra/aws/terraform/outputs.tf
+++ b/infra/aws/terraform/outputs.tf
@@ -33,24 +33,23 @@ output "cloudfront_domain" {
 ##################
 # ACM 인증서 출력 (CDN 도메인 설정 시)
 ##################
-# fixme: CDN 도메인 설정 시 주석 해제
-# output "cdn_domain_cert_arn" {
-#   description = "ACM Certificate ARN"
-#   value       = aws_acm_certificate.cdn_domain_cert.arn
-# }
-#
-# output "cdn_domain_cert_status" {
-#   description = "Certificate Status"
-#   value       = aws_acm_certificate.cdn_domain_cert.status
-# }
-#
-# output "cdn_domain_cert_validation_records" {
-#   description = "DNS validation records for certificate"
-#   value = {
-#     for dvo in aws_acm_certificate.cdn_domain_cert.domain_validation_options : dvo.domain_name => {
-#       name   = dvo.resource_record_name
-#       record = dvo.resource_record_value
-#       type   = dvo.resource_record_type
-#     }
-#   }
-# }
\ No newline at end of file
+output "cdn_domain_cert_arn" {
+  description = "ACM Certificate ARN"
+  value       = aws_acm_certificate.cdn_domain_cert.arn
+}
+
+output "cdn_domain_cert_status" {
+  description = "Certificate Status"
+  value       = aws_acm_certificate.cdn_domain_cert.status
+}
+
+output "cdn_domain_cert_validation_records" {
+  description = "DNS validation records for certificate"
+  value = {
+    for dvo in aws_acm_certificate.cdn_domain_cert.domain_validation_options : dvo.domain_name => {
+      name   = dvo.resource_record_name
+      record = dvo.resource_record_value
+      type   = dvo.resource_record_type
+    }
+  }
+}
\ No newline at end of file
diff --git a/infra/aws/terraform/s3.tf b/infra/aws/terraform/s3.tf
index 821927b..1c571c5 100644
--- a/infra/aws/terraform/s3.tf
+++ b/infra/aws/terraform/s3.tf
@@ -36,37 +36,29 @@ resource "aws_s3_bucket_ownership_controls" "s3_1_ownership" {
 # S3 버킷 정책
 #########################
 # CloudFront OAI가 S3 버킷에 접근할 수 있도록 허용
+# EC2 인스턴스가 파일 업로드/관리 가능
+# AWS 계정 소유자 및 Admin 사용자 접근 허용
 # Presigned URL을 통한 접근 차단
 resource "aws_s3_bucket_policy" "s3_1_policy" {
   bucket = aws_s3_bucket.s3_1.id
   policy = jsonencode({
     Version = "2012-10-17",
     Statement = [
-      # CloudFront가 S3 버킷에 접근할 수 있도록 허용
+      # 1. CloudFront OAI: S3 객체 읽기 (CDN 콘텐츠 제공)
       {
         Sid = "AllowCloudFrontOAIReadOnly",
         Effect = "Allow",
         Principal = {
           AWS = aws_cloudfront_origin_access_identity.oai_1.iam_arn
         },
-        Action = "s3:GetObject",
-        Resource = "${aws_s3_bucket.s3_1.arn}/*"
-      },
-      # Presigned URL을 통한 접근 차단
-      {
-        Sid = "DenyPresignedUrls",
-        Effect = "Deny",
-        Principal = "*",
-        Action = "s3:*",
+        Action = [
+          "s3:GetObject",
+          "s3:ListBucket"
+        ],
         Resource = [
           aws_s3_bucket.s3_1.arn,
           "${aws_s3_bucket.s3_1.arn}/*"
-        ],
-        Condition = {
-          StringLike = {
-            "s3:authType" = "REST-QUERY-STRING"
-          }
-        }
+        ]
       }
     ]
   })
diff --git a/infra/aws/terraform/variables.tf b/infra/aws/terraform/variables.tf
index cdc206e..888daf4 100644
--- a/infra/aws/terraform/variables.tf
+++ b/infra/aws/terraform/variables.tf
@@ -27,12 +27,11 @@ variable "base_domain" {
   default     = "relife.kr"
 }
 
-# fixme: CDN 도메인 변수
-# variable "cdn_domain" {
-#   description = "cdn domain"
-#   type        = string
-#   default = "cdn.gooraeng.xyz"
-# }
+variable "cdn_domain" {
+  description = "cdn domain"
+  type        = string
+  default = "cdn.relife.kr"
+}
 
 variable "encryption_type" {
   description = "S3 암호화 타입 (AES256, aws:kms)"