medusa-deploy

Medusa v2 Deployment

Before writing code

Fetch live docs:

1. Web-search site:docs.medusajs.com deployment production for production deployment guides
2. Web-search site:docs.medusajs.com medusa build for build process details
3. Fetch https://docs.medusajs.com/learn/fundamentals/cli for CLI command reference
4. Web-search site:docs.medusajs.com environment variables configuration for env var reference
5. Web-search site:docs.medusajs.com redis cache events for Redis caching and event bus setup

Build Process

Build Commands

Command	Purpose
npx medusa build	Compile server + admin dashboard for production
npx medusa db:migrate	Run pending database migrations
npx medusa start	Start the production server
npx medusa worker	Start the background worker process

The build step compiles TypeScript, bundles admin extensions (Vite), and prepares the .medusa/ output directory.

Build Output Structure

.medusa/
├── server/           — Compiled server code
│   ├── src/          — Custom modules, routes, workflows
│   └── medusa-config.js
└── admin/            — Bundled admin dashboard (static)

Server vs Worker Mode

Medusa v2 supports running the server and background workers as separate processes:

Mode	Command	Handles
Server	npx medusa start	HTTP requests, API routes, admin dashboard
Worker	npx medusa worker	Workflows, scheduled jobs, event subscribers
Combined	Default start behavior	Both server and worker (single process)

When to Separate

• Development — combined mode is fine
• Production — separate for reliability and independent scaling
• High traffic — scale server instances independently from workers
• Worker mode requires Redis for job queue communication between processes

Environment Variables

Required Variables

Variable	Purpose	Example
DATABASE_URL	PostgreSQL connection string	postgres://user:pass@host:5432/medusa
COOKIE_SECRET	Session cookie signing	Random 32+ character string
JWT_SECRET	JWT token signing	Random 32+ character string
NODE_ENV	Runtime environment	production

Optional but Recommended

Variable	Purpose	Default
REDIS_URL	Redis connection for cache/events/workers	None (in-memory)
STORE_CORS	Store API CORS origins	http://localhost:8000
ADMIN_CORS	Admin API CORS origins	http://localhost:9000
AUTH_CORS	Auth route CORS origins	Combination of store + admin
PORT	Server listen port	9000
MEDUSA_ADMIN_ONBOARDING_TYPE	Admin onboarding flow	default
MEDUSA_WORKER_MODE	server, worker, or shared	shared

Database Configuration

PostgreSQL Requirements

• PostgreSQL required (see official docs for version compatibility)
• Enable SSL in production: append ?sslmode=require to DATABASE_URL
• Connection pooling recommended for high-traffic deployments

Migration Workflow

# Generate migration after DML model changes
npx medusa db:generate <module_name>
# Apply migrations
npx medusa db:migrate

• Always run migrations before starting the new server version
• Back up the database before running migrations in production
• Test migrations against a staging database first

Redis Configuration

Redis serves three roles in production Medusa:

Role	Purpose	Required?
Event Bus	Pub/sub for event-driven subscribers	Recommended
Cache	Module data caching layer	Recommended
Worker Queue	Job queue for background workflows	Required for worker mode

Configure in medusa-config.ts by registering the Redis modules:

// Fetch live docs for Redis module registration
// in medusa-config.ts modules array

• Use separate Redis databases (db index) for cache vs events vs queues
• Set appropriate maxmemory and eviction policies for cache
• Monitor Redis memory usage and connection count in production

Hosting Options

Platform	Type	Notes
Railway	PaaS	One-click deploy, managed PostgreSQL and Redis
DigitalOcean App Platform	PaaS	Managed infrastructure, auto-scaling
AWS (EC2/ECS/Fargate)	IaaS/CaaS	Full control, use with RDS and ElastiCache
Google Cloud Run	Serverless containers	Auto-scaling, pay-per-use
Render	PaaS	Simple deploy, managed databases
Self-hosted (Docker)	Container	Full control, use Docker Compose or Kubernetes
Vercel	Serverless	Admin/storefront hosting only (not the Medusa server)

Docker Deployment

# Fetch live docs for official Medusa Dockerfile
# and docker-compose.yml patterns

A typical Docker Compose setup includes three services: Medusa server, PostgreSQL, and Redis.

Production Checklist

Pre-Deploy

• Set NODE_ENV=production
• Configure unique COOKIE_SECRET and JWT_SECRET
• Set DATABASE_URL with SSL mode enabled
• Configure REDIS_URL for events, cache, and worker queue
• Set CORS variables (STORE_CORS, ADMIN_CORS, AUTH_CORS)
• Run npx medusa build successfully
• Run npx medusa db:migrate against production database

Infrastructure

• PostgreSQL with automated backups and point-in-time recovery
• Redis with persistence enabled (RDB or AOF)
• HTTPS termination (TLS certificate) via reverse proxy or load balancer
• Health check endpoint configured for load balancer
• Log aggregation (stdout/stderr to centralized logging)

Post-Deploy

• Verify admin dashboard loads and login works
• Verify store API responds with publishable key
• Confirm background workers are processing jobs
• Test payment provider webhooks reach the server
• Monitor error rates and response times

Scaling Strategies

Horizontal Scaling

• Run multiple server instances behind a load balancer
• Use Redis-backed sessions for sticky-session-free scaling
• Run multiple worker instances for parallel job processing

Vertical Scaling

• Increase PostgreSQL connection pool size for heavier workloads
• Allocate more memory to Redis for larger cache datasets
• Use --max-old-space-size for Node.js memory limits

Best Practices

• Separate server and worker — run as independent processes in production; scale each based on demand; use Redis as the communication backbone
• Environment variable hygiene — never commit secrets to source control; use platform-native secret management (AWS Secrets Manager, Railway variables, etc.); rotate secrets periodically
• Database management — always test migrations on staging first; automate backups; use connection pooling (PgBouncer) for high concurrency
• Monitoring — track API response times, worker queue depth, database connection count, and Redis memory; set alerts for anomalies

Fetch the Medusa deployment documentation for exact build flags, Docker configuration, and platform-specific deployment guides before deploying.