How do I deploy 🚀 MongoDB 8.2.3 Replica on Railway?

You can deploy 🚀 MongoDB 8.2.3 Replica on Railway by clicking the "Deploy Now" button on this page. Railway will automatically set up all the necessary services and configurations for you.

What are the system requirements?

Railway handles all the infrastructure requirements. You only need a web browser to deploy and manage your application.

Is this template free to use?

Yes, this template is free to use within your existing Railway account.

Can I customize this template?

Yes, you can fully customize this template. After deployment, you will have full control of what you've deployed in your Railway project.

How do I get support for this template?

You can get support through our community forum: mongo-db-8-2-3-replica-0a29df47, or click "Get template help" for this template for more assistance.

Deploy and Host MongoDB 8.2.3 Replica on Railway

MongoDB 8.2.3 Replica Set is a robust high-availability NoSQL database architecture. This template deploys a production-ready PSA (Primary-Secondary-Arbiter) configuration, ensuring data redundancy, automatic failover, and read scalability. It comes pre-configured with secure keyfile authentication and internal networking support, making it ready for mission-critical applications.

About Hosting MongoDB 8.2.3 Replica

Hosting this replica set involves deploying three interconnected service nodes within Railway's private network: a Primary node for write operations, a Secondary node for data redundancy and read scaling, and a lightweight Arbiter node to participate in elections without storage overhead.

The template includes an ephemeral initialization service that automatically configures the replica set members once they are online. This eliminates the complexity of manual CLI configuration. Persistence is handled via Railway volumes attached to the data-bearing nodes, ensuring data safety across deployments. Security is enforced using strict keyfile-based internal authentication.

Common Use Cases

High-Availability Applications: Ensure zero downtime for mission-critical web and mobile backends with automatic failover capabilities.
Microservices Architecture: Serve as a reliable, scalable centralized data store for distributed microservices.
Read-Heavy Workloads: Offload read operations to the Secondary node to improve performance for analytics or reporting dashboards.

Dependencies for MongoDB 8.2.3 Replica Hosting

MongoDB 8.2.3 Official Docker Image
Railway Private Networking (IPv6)

Deployment Dependencies

Implementation Details

This template uses a PSA (Primary-Secondary-Arbiter) architecture:

Primary: Variable priority, votes, stores data.
Secondary: Variable priority, votes, stores data.
Arbiter: No data storage, participates in elections only (Cost-effective).

Authentication: Nodes authenticate with each other using a shared KEYFILE environment variable. You must generate a Base64 keyfile string and set it across all nodes during deployment for security.

How to Configure

When deploying the template, ensure you provide the following variables for the Primary service (which will be shared to others):

Keyfile: Provide a secure Base64 string in KEYFILE.
Username: Set your admin username in MONGO_INITDB_ROOT_USERNAME.
Password: Set your secure password in MONGO_INITDB_ROOT_PASSWORD.

External Connectivity

To connect to your database from an external client (setup after deployment):

Go to the Primary service settings.
Navigate to Networking > Public Networking.
Click to create a TCP Proxy domain (Port 27017).
Connect using the generated address with Direct Connection mode: mongodb://user:pass@proxy-domain:port/?directConnection=true&authSource=admin

Why Deploy MongoDB 8.2.3 Replica 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 MongoDB 8.2.3 Replica 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.

Support This Project

If this template saves you time and money, consider supporting its development! ☕