Deploy and Host DynamoDB Local on Railway

DynamoDB Local is a self-hosted Amazon DynamoDB environment for application development and testing. It provides a DynamoDB-compatible API that can be used with AWS SDKs, AWS CLI, automated tests, and local development workflows without connecting to the managed DynamoDB service.

About Hosting DynamoDB Local

This deployment runs the official DynamoDB Local container on Railway.

DynamoDB Local exposes an HTTP API compatible with common DynamoDB development workflows and can persist local database files on a Railway Volume.

The deployment uses shared database mode so clients can work against a single local DynamoDB database regardless of the AWS access key or region used by the client.

No PostgreSQL, Redis, MySQL, MongoDB, or external database is required.

Common Use Cases

Develop applications that use DynamoDB
Test DynamoDB reads, writes, queries, and scans
Run integration tests without connecting to AWS
Test AWS SDK integrations
Test table creation and schema workflows
Create isolated DynamoDB environments for CI/CD
Develop against DynamoDB-compatible APIs without cloud usage costs
Share a reusable DynamoDB testing environment across development teams

Dependencies for DynamoDB Local Hosting

This deployment requires:

Official DynamoDB Local container image
Railway networking
A Railway Volume for persistent database storage
AWS CLI, AWS SDK, or another DynamoDB-compatible client

DynamoDB Local does not require:

PostgreSQL
Redis
MySQL
MongoDB
A real AWS account
Real AWS access credentials

Networking

DynamoDB Local listens on port:

Generate a Railway public domain for this port.

The resulting API endpoint will look similar to:

https://your-dynamodb-local.up.railway.app

This endpoint is intended for DynamoDB API requests.

DynamoDB Local does not provide a built-in web dashboard or graphical user interface.

Opening the root domain directly in a browser should therefore not be expected to display a web application.

Persistent Storage

Add a Railway Volume and mount it at:

/home/dynamodblocal/data

DynamoDB Local stores its local database files in this directory.

Using persistent storage allows local tables and items to survive supported container restarts and redeployments.

No external database is required for persistence.

Shared Database Mode

This deployment uses DynamoDB Local shared database mode.

With shared database mode enabled, clients connect to the same local DynamoDB database instead of creating separate database files based on AWS access key and region.

This makes the deployment easier to share across:

Development applications
CI pipelines
Test suites
Multiple SDK clients
Team environments

Connecting with AWS CLI

AWS CLI can connect to DynamoDB Local using a custom endpoint.

Configure test credentials:

export AWS_ACCESS_KEY_ID=test
export AWS_SECRET_ACCESS_KEY=test
export AWS_DEFAULT_REGION=us-east-1

Then list available tables:

aws dynamodb list-tables \
  --endpoint-url https://your-dynamodb-local.up.railway.app

A new deployment typically returns:

{
  "TableNames": []
}

The credentials do not need to belong to a real AWS account when communicating with DynamoDB Local.

Creating a Table

Example:

aws dynamodb create-table \
  --table-name Users \
  --attribute-definitions AttributeName=id,AttributeType=S \
  --key-schema AttributeName=id,KeyType=HASH \
  --billing-mode PAY_PER_REQUEST \
  --endpoint-url https://your-dynamodb-local.up.railway.app

Verify the table:

aws dynamodb list-tables \
  --endpoint-url https://your-dynamodb-local.up.railway.app

Connecting Applications

Applications can configure their AWS SDK to use the Railway domain as a custom DynamoDB endpoint.

Example endpoint:

https://your-dynamodb-local.up.railway.app

Applications running inside the same Railway project can alternatively use Railway private networking.

For a service named dynamodb-local:

http://dynamodb-local.railway.internal:8000

Use test credentials and the same endpoint configuration supported by your AWS SDK.

Example Node.js Client

Example using AWS SDK for JavaScript:

import { DynamoDBClient } from "@aws-sdk/client-dynamodb";

const client = new DynamoDBClient({
  region: "us-east-1",
  endpoint: "https://your-dynamodb-local.up.railway.app",
  credentials: {
    accessKeyId: "test",
    secretAccessKey: "test"
  }
});

No real AWS credentials are required for DynamoDB Local.

Persistence Test

To verify persistent storage:

Create a DynamoDB table.
Insert one or more items.
Restart the Railway service.
List the tables again.
Confirm that the previously created table still exists.

If the table remains available after restart, the Railway Volume is being used correctly.

Service Architecture

Application / AWS SDK / AWS CLI
              │
              │ DynamoDB API
              ▼
        DynamoDB Local
             :8000
              │
              ▼
/home/dynamodblocal/data
              │
              ▼
        Railway Volume

Important Notes

DynamoDB Local is intended for development, testing, and CI workflows.
It is not a production replacement for Amazon DynamoDB.
DynamoDB Local does not provide a built-in web UI.
Use AWS CLI, AWS SDKs, or another DynamoDB-compatible client to interact with the service.
Persistent database files are stored under /home/dynamodblocal/data.
A Railway Volume is recommended when tables and items need to survive restarts.
No PostgreSQL, Redis, MySQL, or MongoDB service is required.
Real AWS credentials are not required.
Some DynamoDB cloud features may behave differently or may not be available in DynamoDB Local.
Advanced application behavior should be validated against the managed DynamoDB service before production deployment.

Why Deploy DynamoDB Local on Railway?

Railway provides a managed platform for running DynamoDB Local without requiring users to maintain dedicated development servers.

Deploying DynamoDB Local on Railway provides a reusable DynamoDB-compatible endpoint for application development, integration testing, CI pipelines, and team environments without connecting directly to production AWS resources.