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Add Winston log rotation to prevent unbounded log file growth in production #270

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Add Winston log rotation to prevent unbounded log file growth in production #270

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ec43baa
added winston logger feature
Mar 29, 2026
853ed87
Merge pull request #1 from jerrygeorge360/feature/winston-logger
jerrygeorge360 Mar 30, 2026
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3 changes: 3 additions & 0 deletions backend/.env.example
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Original file line number Diff line number Diff line change
Expand Up @@ -3,6 +3,9 @@ PORT=3001
NODE_ENV=development
FRONTEND_URL=http://localhost:3000

# Logging
LOG_LEVEL=info

# Database
DATABASE_URL=postgresql://user:password@localhost:5432/synchro

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1 change: 1 addition & 0 deletions backend/.gitignore
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Expand Up @@ -3,6 +3,7 @@ dist/
.env
.env.local
*.log
logs/
.DS_Store
coverage/
.nyc_output/
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1 change: 1 addition & 0 deletions backend/package.json
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Expand Up @@ -36,6 +36,7 @@
"uuid": "^13.0.0",
"web-push": "^3.6.7",
"winston": "^3.14.0",
"winston-daily-rotate-file": "^5.0.0",
"zod": "^3.23.8"
},
"devDependencies": {
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18 changes: 16 additions & 2 deletions backend/src/config/logger.ts
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Original file line number Diff line number Diff line change
@@ -1,4 +1,5 @@
import winston from 'winston';
import DailyRotateFile from 'winston-daily-rotate-file';
import { requestContextStorage } from '../middleware/requestContext';

/**
Expand Down Expand Up @@ -27,8 +28,21 @@ const logger = winston.createLogger({
),
defaultMeta: { service: 'synchro-backend' },
transports: [
new winston.transports.File({ filename: 'error.log', level: 'error' }),
new winston.transports.File({ filename: 'combined.log' }),
new DailyRotateFile({
filename: 'logs/error-%DATE%.log',
datePattern: 'YYYY-MM-DD',
zippedArchive: true,
maxSize: '10m',
maxFiles: '30d',
level: 'error',
}),
new DailyRotateFile({
filename: 'logs/combined-%DATE%.log',
datePattern: 'YYYY-MM-DD',
zippedArchive: true,
maxSize: '20m',
maxFiles: '14d',
}),
],
});

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