MongoDB Config Generator

Create secure mongod.conf files with WiredTiger tuning, replica set configurations, and proper authorization.

MongoDB Version

Target Version

Network Settings

Bind IP

Use 127.0.0.1 for local, or comma-separated IPs (e.g., 127.0.0.1,10.0.0.5).

Port

Storage & WiredTiger

Database Path

Enable Journaling

WiredTiger Cache Size (GB)

Default is ~50% of RAM minus 1GB. Set explicitly to constrain MongoDB memory usage.

Security & TLS

Authorization

TLS Mode

Replication & Sharding

Replica Set Name

Name of the replica set (e.g., rs0).

Key File Path

Required for internal replica set authentication if Authorization is enabled.

Logging & Profiling

Log Destination

Profiling Mode

mongod.conf

Overview

MongoDB is the leading NoSQL document database. However, out-of-the-box, older or unconfigured MongoDB instances often lack strict access controls and memory limits. A production-ready mongod.conf is required to lock down access, configure the WiredTiger storage engine, and enable high-availability replica sets.

Access Control

Enforce role-based access control (RBAC) and configure TLS certificates for encrypted connections.

WiredTiger Cache

Properly limit the internal memory cache to prevent MongoDB from starving the OS file system cache.

High Availability

Configure Replica Sets and internal keyFile authentication for seamless failover.

Production Checklist

Create an Admin User: Before enabling authorization, you must create a user with the userAdminAnyDatabase role via the mongo shell.
KeyFile Permissions: The keyFile used for replica sets must have chmod 400 permissions and be owned by the mongodb user. MongoDB will refuse to start if permissions are too open.
Journaling: Ensure journal.enabled = true. This is critical for data durability in the event of an unexpected shutdown.
Backups: Use mongodump for small databases, or file-system snapshots / MongoDB Cloud Manager for large production datasets.