From 8269eee996b6883abce5247d360ef21e6afa4635 Mon Sep 17 00:00:00 2001
From: jisangs <jisangs@gmail.com>
Date: Sat, 4 Jul 2026 17:58:58 +0900
Subject: [PATCH] =?UTF-8?q?=EB=A1=9C=EA=B7=B8=20=ED=8C=8C=EC=9D=BC?=
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---
 docker-compose.stage.yml |  7 +++++++
 lib/db.ts                |  6 +++---
 lib/logger.ts            | 17 ++++++++++++++++-
 3 files changed, 26 insertions(+), 4 deletions(-)

diff --git a/docker-compose.stage.yml b/docker-compose.stage.yml
index 8cd76bb..330ac3d 100644
--- a/docker-compose.stage.yml
+++ b/docker-compose.stage.yml
@@ -18,6 +18,13 @@ services:
     networks:
       - proxy-network
     restart: unless-stopped
+    # Synology 기본 db 로그 드라이버는 대량 로그 버스트 시 메시지를 드롭한다.
+    # json-file(blocking 모드)은 무손실 — 표/SQL 로그 잘림 방지.
+    logging:
+      driver: json-file
+      options:
+        max-size: "10m"
+        max-file: "3"
 
 networks:
   proxy-network:
diff --git a/lib/db.ts b/lib/db.ts
index 55d7bb9..695f6aa 100644
--- a/lib/db.ts
+++ b/lib/db.ts
@@ -4,7 +4,7 @@ import { PrismaMariaDb } from "@prisma/adapter-mariadb";
 import { format } from "sql-formatter";
 
 import { PrismaClient, Prisma } from "@/lib/generated/prisma/client";
-import { logger } from "@/lib/logger";
+import { logger, timestamp } from "@/lib/logger";
 
 const globalForPrisma = globalThis as unknown as {
   prisma?: PrismaClient;
@@ -54,7 +54,7 @@ function onQuery(e: Prisma.QueryEvent): void {
   const sqlToFormat = isSensitive ? e.query : inlineParams(e.query, e.params);
   const formatted = format(sqlToFormat, { language: "mysql", tabWidth: 2 });
 
-  const ts = new Date().toISOString();
+  const ts = timestamp();
   const tag = level.toUpperCase().padEnd(5);
   const slowLabel = isSlow ? " [SLOW]" : "";
   const header = `[${ts}] [${tag}] [db:query] ${e.duration}ms${slowLabel}`;
@@ -209,7 +209,7 @@ function logResult(
   result: unknown
 ): void {
   if (!logger.isEnabled("debug")) return;
-  const ts = new Date().toISOString();
+  const ts = timestamp();
   const body = buildResultLog(model, operation, result);
   writeAll(1, `[${ts}] [DEBUG] [db:result] ${body}\n`);
 }
diff --git a/lib/logger.ts b/lib/logger.ts
index 45fab84..0bb5179 100644
--- a/lib/logger.ts
+++ b/lib/logger.ts
@@ -18,6 +18,21 @@ function shouldLog(level: Level): boolean {
   return PRIORITY[level] >= PRIORITY[getMinLevel()];
 }
 
+// TZ 환경변수 기준 로컬 시간 (toISOString은 항상 UTC라 사용하지 않음)
+export function timestamp(): string {
+  const d = new Date();
+  const pad = (n: number, w = 2) => String(n).padStart(w, "0");
+  const offMin = -d.getTimezoneOffset();
+  const sign = offMin >= 0 ? "+" : "-";
+  const abs = Math.abs(offMin);
+  return (
+    `${d.getFullYear()}-${pad(d.getMonth() + 1)}-${pad(d.getDate())}` +
+    `T${pad(d.getHours())}:${pad(d.getMinutes())}:${pad(d.getSeconds())}` +
+    `.${pad(d.getMilliseconds(), 3)}` +
+    `${sign}${pad(Math.floor(abs / 60))}:${pad(abs % 60)}`
+  );
+}
+
 function write(
   level: Level,
   ctx: string,
@@ -25,7 +40,7 @@ function write(
   data?: Record<string, unknown>
 ): void {
   if (!shouldLog(level)) return;
-  const ts = new Date().toISOString();
+  const ts = timestamp();
   const tag = level.toUpperCase().padEnd(5);
   const line = data
     ? `[${ts}] [${tag}] [${ctx}] ${message} ${JSON.stringify(data)}`