Dragonfly

Dragonfly is a modern, Redis-compatible in-memory datastore. Use it for caching, session storage, queues, and any workload where you'd normally use Redis.

Create a Dragonfly Service

1. Click Add Service in your project
2. Select Database
3. Choose Dragonfly
4. Select a storage size
5. Enter a name (e.g., dragonfly-cache, dragonfly-sessions)
6. Click Create

Rock8Cloud provisions the instance with networking handled automatically.

Environment Variables

After creation, Rock8Cloud exposes these variables for your application to connect:

Linking to Your Application

1. Go to your application service → Configuration → Environment Variables
2. Add the Dragonfly variables using the names expected by your framework

Common framework patterns:

# Node.js (ioredis / redis)
REDIS_HOST=<HOST>
REDIS_PORT=<PORT>
# or
REDIS_URL=redis://<HOST>:<PORT>

# Python (redis-py)
REDIS_HOST=<HOST>
REDIS_PORT=<PORT>

# Rails (Sidekiq, Action Cable)
REDIS_URL=redis://<HOST>:<PORT>/0

After saving, your application automatically redeploys with the new configuration.

Features

• Redis-compatible — drop-in replacement for Redis, works with any Redis client library
• High performance — multi-threaded architecture, significantly faster than Redis for many workloads
• Persistent storage — data survives restarts and redeployments
• Network-isolated — only accessible from services within the same project
• Fully managed — automated lifecycle management with zero configuration

Troubleshooting

Connection refused

• Verify the HOST variable is correct — use the auto-generated hostname provided by Rock8Cloud
• Ensure your application service is in the same project as Dragonfly
• Check that the Dragonfly deployment completed successfully

Client compatibility

• Dragonfly supports the Redis protocol — use any standard Redis client
• If using advanced Redis features (e.g., Redis Modules), check Dragonfly's compatibility docs

Related

• PostgreSQL — Relational database
• S3 Object Storage — S3-compatible object storage
• Environment Variables — Configure secrets and settings