auth/docs/getting-started/REDIS_SETUP.md

Redis Setup Guide

Redis is used for distributed rate limiting and OTP tracking. It's optional - the service will use in-memory rate limiting if Redis is not available.

Quick Start

Option 1: Using Docker Compose (Recommended for Local Development)

Redis is already configured in db/farmmarket-db/docker-compose.yml. Start it with:

cd db/farmmarket-db
docker-compose up -d redis

Or start all services (PostgreSQL + Redis):

docker-compose up -d

Then add to your .env file:

REDIS_URL=redis://localhost:6379

Option 2: Install Redis Locally

macOS (using Homebrew)

brew install redis
brew services start redis

Ubuntu/Debian

sudo apt update
sudo apt install redis-server
sudo systemctl start redis-server
sudo systemctl enable redis-server

Windows

Download and install from: https://github.com/microsoftarchive/redis/releases

Then add to your .env file:

REDIS_URL=redis://localhost:6379

Option 3: Use Cloud Redis (Production)

For production, use a managed Redis service:

• AWS ElastiCache: redis://your-elasticache-endpoint:6379
• Redis Cloud: redis://user:password@redis-cloud-host:6379
• Azure Cache for Redis: redis://your-cache.redis.cache.windows.net:6380?ssl=true

Add to your .env file:

REDIS_URL=redis://your-redis-host:6379
# OR with password
REDIS_URL=redis://:password@your-redis-host:6379

Environment Variables

Using REDIS_URL (Recommended)

Single connection string with all details:

# Without password
REDIS_URL=redis://localhost:6379

# With password
REDIS_URL=redis://:password@localhost:6379

# With username and password
REDIS_URL=redis://username:password@localhost:6379

# With SSL (AWS ElastiCache, etc.)
REDIS_URL=rediss://your-redis-host:6379

Using REDIS_HOST and REDIS_PORT

Separate host and port:

REDIS_HOST=localhost
REDIS_PORT=6379
REDIS_PASSWORD=your_password  # Optional

Verification

Test Redis Connection

Start your application and look for:

✅ Redis Client: Ready

If Redis is not available, you'll see:

⚠️ Redis not available. Rate limiting will use in-memory fallback.

Test Redis Manually

# Using redis-cli (if installed)
redis-cli ping
# Should return: PONG

# Test connection with password
redis-cli -h localhost -p 6379 -a your_password ping

Docker Compose Setup

The docker-compose.yml file includes Redis:

services:
  redis:
    image: redis:7-alpine
    container_name: farmmarket-redis
    restart: always
    ports:
      - "6379:6379"
    volumes:
      - redis_data:/data
    command: redis-server --appendonly yes

Start Redis Only

cd db/farmmarket-db
docker-compose up -d redis

Stop Redis

docker-compose stop redis

View Redis Logs

docker-compose logs -f redis

Production Recommendations

1. Use Managed Redis Service

For production, use a managed Redis service:

• AWS ElastiCache (recommended for AWS deployments)
• Redis Cloud
• Azure Cache for Redis
• Google Cloud Memorystore

2. Enable Redis Persistence

If using your own Redis instance:

• Enable AOF (Append-Only File) persistence
• Configure regular snapshots (RDB)
• Set up replication for high availability

3. Security

• Use password authentication in production
• Enable SSL/TLS for connections
• Restrict network access (firewall/VPC)
• Use IAM roles (for AWS ElastiCache)

Example: AWS ElastiCache Configuration

# AWS ElastiCache endpoint
REDIS_URL=redis://your-cluster.xxxxx.cache.amazonaws.com:6379

# With password
REDIS_URL=redis://:your-password@your-cluster.xxxxx.cache.amazonaws.com:6379

# With SSL (if enabled)
REDIS_URL=rediss://your-cluster.xxxxx.cache.amazonaws.com:6379

Benefits of Using Redis

Without Redis (In-Memory)

• ✅ Simple setup
• ✅ No external dependencies
• ❌ Rate limits reset on server restart
• ❌ Not shared across multiple server instances
• ❌ Limited scalability

With Redis

• ✅ Persistent rate limits (survive restarts)
• ✅ Shared across multiple server instances
• ✅ Better scalability
• ✅ Can handle high traffic
• ❌ Requires Redis setup and maintenance

Troubleshooting

Connection Refused

Error: ECONNREFUSED or Connection refused

Solutions:

1. Check if Redis is running: docker-compose ps or redis-cli ping
2. Verify Redis port is correct (default: 6379)
3. Check firewall settings
4. Verify REDIS_URL or REDIS_HOST is correct

Authentication Failed

Error: NOAUTH Authentication required

Solutions:

1. Add password to REDIS_URL: redis://:password@host:6379
2. Or set REDIS_PASSWORD environment variable
3. Verify password is correct

Timeout Errors

Error: Connection timeout

Solutions:

1. Check network connectivity
2. Verify Redis host and port are correct
3. Check if Redis is behind a firewall
4. Increase connection timeout if needed

Performance Tuning

Connection Pooling

The Redis client automatically manages connections. Default settings are suitable for most use cases.

Memory Optimization

If using local Redis:

# Set max memory (e.g., 256MB)
redis-cli CONFIG SET maxmemory 256mb
redis-cli CONFIG SET maxmemory-policy allkeys-lru

Monitoring

Check Redis Stats

redis-cli INFO stats

Monitor Commands

redis-cli MONITOR

Check Memory Usage

redis-cli INFO memory

Next Steps

1. Set up Redis using one of the options above
2. Add Redis configuration to your .env file
3. Restart your application
4. Verify connection with ✅ Redis Client: Ready message
5. Test rate limiting to ensure it's working