---
title: "Deploy ScyllaDB | (Just Updated) Cassandra-Compatible Database, Password On From Boot"
description: "Cassandra-compatible database. Password on from boot, data on a volume."
category: "Storage"
url: https://railway.com/deploy/scylladb-or-just-updated-cassandra-compa
---

# Deploy ScyllaDB | (Just Updated) Cassandra-Compatible Database, Password On From Boot

Cassandra-compatible database. Password on from boot, data on a volume.

**[Deploy ScyllaDB | (Just Updated) Cassandra-Compatible Database, Password On From Boot on Railway](https://railway.com/template/scylladb-or-just-updated-cassandra-compa)**

Machine-readable deploy manifest (JSON, validated by TemplateCI): https://railway.com/deploy/scylladb-or-just-updated-cassandra-compa/manifest.json

- **Creator:** SuperSlowSloth
- **Category:** Storage

## Template content

### scylladb

- **Image:** scylladb/scylla:2025.1@sha256:9eb53463bfed32356e1ba81eb6d9c606ffaa520ed804cc03b17713f4b4e7d84b
- **Start command:** `/bin/sh -c 'echo "[railway] scylla uid=$(id -u) data_owner=$(stat -c %u:%g /var/lib/scylla) pids.max=$(cat /sys/fs/cgroup/pids.max 2>/dev/null) mem.max=$(cat /sys/fs/cgroup/memory.max 2>/dev/null)"; IP=$(hostname -i | tr " " "\\n" | grep -E "^[0-9]+\\.[0-9]+\\.[0-9]+\\.[0-9]+$" | head -1); echo "[railway] ip=$IP"; SQ=$(printf "\047"); ( for i in $(seq 1 180); do if cqlsh -u cassandra -p "$SCYLLA_PASSWORD" -e "SELECT now() FROM system.local" >/dev/null 2>&1; then echo "[railway] password active"; break; fi; if cqlsh -u cassandra -p cassandra -e "ALTER ROLE cassandra WITH PASSWORD = ${SQ}${SCYLLA_PASSWORD}${SQ}" >/dev/null 2>&1; then echo "[railway] default password replaced"; break; fi; sleep 5; done ) & exec /docker-entrypoint.py --listen-address "$IP" --rpc-address "$IP" --broadcast-address "$IP" --broadcast-rpc-address "$IP" --seeds "$IP" --smp 2 --memory 1536M --overprovisioned 1 --developer-mode 1 --authenticator PasswordAuthenticator --authorizer CassandraAuthorizer'`

## Documentation

# Deploy and Host ScyllaDB on Railway

ScyllaDB is a Cassandra-compatible NoSQL database written in C++ for low-latency, high-throughput workloads. It is queried with CQL and works with standard Cassandra drivers. This template runs a single ScyllaDB 2025.1 node with a persistent volume, password authentication switched on from the first boot, and a public TCP endpoint for CQL clients.

## About Hosting ScyllaDB

This template runs the official `scylladb/scylla` image (pinned by digest). Data lives on a volume mounted at `/var/lib/scylla`, so keyspaces survive redeploys. `PasswordAuthenticator` and `CassandraAuthorizer` are enabled at boot, and the default `cassandra/cassandra` login is replaced with the generated `SCYLLA_PASSWORD` within seconds of the node accepting connections. The node is capped to 2 shards and 1.5 GB of memory (`--smp 2 --memory 1536M`) so it does not size itself from the host's cores or RAM. The listen addresses are pinned to the container's single IPv4 address, which avoids the image's dual-address startup crash. Allow a minute or two on first boot before CQL answers.

Agent contract:

- CQL host (public): `SCYLLA_PUBLIC_HOST`, port `SCYLLA_PUBLIC_PORT` (TCP proxy to 9042)
- CQL host (private network): `SCYLLA_PRIVATE_HOST`, port `9042`
- Username: `cassandra`
- Password variable: `SCYLLA_PASSWORD`
- No HTTP health path; check readiness by a CQL login

```bash
docker run --rm --entrypoint cqlsh scylladb/scylla:2025.1 $SCYLLA_PUBLIC_HOST $SCYLLA_PUBLIC_PORT \
  -u cassandra -p "$SCYLLA_PASSWORD" \
  -e "CREATE KEYSPACE IF NOT EXISTS app WITH replication = {'class':'SimpleStrategy','replication_factor':1}; DESCRIBE KEYSPACES;"
```

## Why Deploy ScyllaDB on Railway?

Railway is a singular platform to deploy your infrastructure stack. Railway will host your infrastructure so you don't have to deal with configuration, while allowing you to vertically and horizontally scale it.

By deploying ScyllaDB on Railway, you are one step closer to supporting a complete full-stack application with minimal burden. Host your servers, databases, AI agents, and more on Railway.

- **Secure by default** — unauthenticated CQL is rejected and the default password does not work.
- **Data survives redeploys** — the volume is preconfigured and verified with a write, redeploy, read.
- **Zero configuration** — no variables to fill in; the contract above is everything a client needs.
- **Cassandra drivers work** — any CQL driver connects over the TCP endpoint.

## Common Use Cases

- **Time-series and event logging** — append-heavy workloads keyed by device, user or day.
- **Agent and session state** — wide rows for conversation history and activity feeds.
- **Cassandra drop-in for development** — run existing drivers and schemas against a lighter server.

## Dependencies for ScyllaDB Hosting

- A volume mounted at `/var/lib/scylla` (included in this template).

### Deployment Dependencies

- [scylladb/scylladb](https://github.com/scylladb/scylladb) — upstream server
- [scylladb/scylla on Docker Hub](https://hub.docker.com/r/scylladb/scylla) — the pinned image this template deploys


## Similar templates

- [RustFS | (Just Updated) S3 Object Store, Public URL and Keys Set](https://railway.com/deploy/rustfs-or-just-updated-s3-object-store-p) — S3-compatible object store, keys and public URL preset, volume kept
- [TimescaleDB](https://railway.com/deploy/timescaledb-railway-template) — A PostgreSQL-based time-series database for analytics on Railway.
- [Garage S3 Storage](https://railway.com/deploy/garage-s3-storage) — Ultra-light S3 server: fast, open-source, plug-and-play.

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