MongoDB (Replica Set)

Learn how to add MongoDB (Replica Set) as a resource in StrongDM.

Overview

This guide describes how to add a MongoDB (Replica Set) database as a datasource in StrongDM.

When the resource is added, StrongDM proxies client connections through a node (gateway, relay, or proxy cluster). This enables centralized access control, credential management, and audit logging. StrongDM supports MongoDB version 8 and under.

Use this guide to complete all necessary preparations to add this resource to your StrongDM environment; input the correct properties in the Admin UI, CLI, SDKs, or Terraform provider; and test for a successful connection.

For general information about how to add a database as a resource in StrongDM, see our main guide, Add a Datasource.

Supported Versions and Clients

StrongDM supports MongoDB clusters configured as replica sets (version 8 and below).

Clients supported include:

• Standard MongoDB drivers and libraries (for example, the official MongoDB client for Node.js, Python, Java, and so forth)

• Tools like mongo shell or GUI clients that support MongoDB replica set connection strings

Prerequisites

To add your resource in StrongDM, you need to meet several technical and configuration prerequisites. Please ensure that the following requirements are met.

In StrongDM, you must have the following:

• Administrator permission level

• At least one operational StrongDM node (gateway, relay, or proxy cluster) that can reach the MongoDB replica set endpoint(s) over TCP (default port is 27017)

• If using secrets management tools for storing your database credentials, a Secret Store configured in StrongDM

To verify that the resource is accessible by the node, log in to the gateway or relay and use Netcat: nc -zv <HOSTNAME> <PORT> (in this example, nc -zv testdb-01.fancy.org 3306). If your gateway server can connect to this hostname, proceed.

Netcat is a tool for checking various hostnames and ports by either sending data (a ping) or checking for listeners on the ports. The command in the aforementioned example use "-z" to check for listeners without sending data and "-v" to show verbose output. If you don't have Netcat, you can install the Netcat package with whatever package manager you are using, such as "apt-get install netcat".

On the MongoDB side, you must have the following:

• Properly configured replica set, with the set name defined

• Database user with appropriate privileges (read or read/write, depending on your needs)

• Authentication database where the user is defined (commonly admin)

• TLS/SSL enabled, if required by your organization

• Network accessibility (firewalls, security groups, or VPC rules) that allows StrongDM nodes to connect

Resource Management in StrongDM

After all prerequisites and prep work is done, you are ready to add the resource to StrongDM. This section provides instructions for adding the resource in either the StrongDM Admin UI, CLI, Terraform provider, or SDKs.

Admin UI

Set up and Manage With the Admin UI

If using the Admin UI to add MongoDB (replica set) as a resource to StrongDM, use the following steps.

1. Log in to the StrongDM Admin UI.

2. Go to Resources > Datasources.

3. Click Add datasource.

4. For Datasource Type, select MongoDB (replica set).

5. Complete all required configuration properties for your selected datasource type.

6. Click Create to save the resource.

7. Click the resource name to view status, diagnostic information, and setting details.

CLI

Set up and Manage With the CLI

This section provides an example of how to add the resource using the StrongDM CLI. For more information and examples, please see the CLI Reference documentation.

# Add MongoDB (Replica Set) datasource
sdm admin datasources add mongodb-replicaset mongo-replica-prod
  --hostname="mongo-replica.example.org"
  --port=27017
  --username="mongo_user"
  --password="secret"
  --authentication-database="admin"
  --replica-set="rs0"
  --tls-required
  --bind-interface="127.0.0.1"
  --egress-filter="tag:env=prod"
  --proxy-cluster-id="n-1a2b345c67890123"
  --secret-store-id="se-e1b2"
  --subdomain="mongo-replica-prod"
  --tags="env=production,team=backend"

Terraform

Set up and Manage With Terraform

This section provides an example of how to configure and manage the resource using the Terraform provider. For more information and examples, please see the Terraform provider documentation.

# Install StrongDM provider
terraform {
  required_providers {
    sdm = {
      source  = "strongdm/sdm"
      version = "5.1.0"
    }
  }
}

# Configure StrongDM provider
provider "sdm" {
  # Add API access key and secret key from Admin UI
  api_access_key = "njjSn...5hM"
  api_secret_key = "ziG...="
}

# Create MongoDB (Replica Set) resource
resource "sdm_mongodb_replicaset" "mongo_replica_prod" {
  name                      = "mongo-replica-prod"
  hostname                  = "mongo-replica.example.org"
  port                      = 27017
  username                  = "mongo_user"
  password                  = "secret"
  authentication_database   = "admin"
  replica_set               = "rs0"
  tls_required              = true

  bind_interface            = "127.0.0.1"
  egress_filter             = "tag:env=prod"
  proxy_cluster_id          = "n-1a2b345c67890123"

  secret_store_id           = "se-e1b2"
  subdomain                 = "mongo-replica-prod"
  tags = {
    env   = "production"
    team  = "backend"
  }
}

SDKs

Set up and manage with SDKs

In addition to the Admin UI, CLI, and Terraform, you may configure and manage your resource with any of the following SDK options: Go, Java, Python, and Ruby. Please see the following references for more information and examples.

Language	Reference	GitHub	Examples
Go	pkg.go.dev	strongdm-sdk-go	Go SDK Examples
Java	javadoc	strongdm-sdk-java	Java SDK Examples
Python	pdocs	strongdm-sdk-python	Python SDK Examples
Ruby	RubyDoc	strongdm-sdk-ruby	Ruby SDK Examples

Configuration Properties

The following configuration properties are required to define a MongoDB datasource in StrongDM. These settings control how StrongDM connects to the database, authenticates the connection, and optionally uses encryption or secret management. Each property must be correctly configured to ensure connectivity and access enforcement through StrongDM.

Property	Requirement	Description
Display Name	Required	Meaningful name to display the resource throughout StrongDM; exclude special characters like quotes (") or angle brackets (< or >)
Datasource Type	Required	Select MongoDB (replica set). If you want to add a MongoDB resource without specifying a replica set, see the instructions for MongoDB (single host) resource type instead.
Proxy Cluster	Required	Defaults to "None (use gateways)"; if using proxy clusters, select the appropriate cluster to proxy traffic to this resource
Hostname	Required	Hostname for your MongoDB database resource; must be accessible to a gateway or relay
Port	Required	Port to use when connecting to your MongoDB database; default port value is 27017
Connectivity Mode	Required	Select either Virtual Networking Mode, which lets users connect to the resource with a software-defined, IP-based network; or Loopback Mode, which allows users to connect to the resource using the local loopback adapter in their operating system; this field is shown if Virtual Networking Mode enabled for your organization
IP Address	Optional	If Virtual Networking Mode is the selected connectivity mode, an IP address value in the configured Virtual Networking Mode subnet in the organization network settings; if Loopback Mode is the selected connectivity mode, an IP address value in the configured Loopback IP range in the organization network settings (by default, 127.0.0.1); if not specified, an available IP address in the configured IP address space for the selected connectivity mode will be automatically assigned; this field is shown if Virtual Networking Mode and/or multi-loopback mode is enabled for your organization
Port Override	Optional	If Virtual Networking Mode is the selected connectivity mode, a port value between 1 and 65535 that is not already in use by another resource with the same IP address; if Loopback Mode is the selected connectivity mode, a port value between 1024 to 64999 that is not already in use by another resource with the same IP address; when left empty with Virtual Networking Mode, the system assigns the default port to this resource; when left empty for Loopback Mode, an available port that is not already in use by another resource is assigned; preferred port also can be modified later from the Port Overrides settings
DNS	Optional	If Virtual Networking Mode is the selected connectivity mode, a unique hostname alias for this resource; when set, causes the desktop app to display this resource's human-readable DNS name (for example, k8s.my-organization-name) instead of the bind address that includes IP address and port (for example, 100.64.100.100:5432)
Authentication Database	Required	Enter the name of the authentication database (that is, the database that MongoDB users authenticate against, not the database to which you are granting access); in this example, the authentication database is sdmdb, while the MongoDB default database is admin
Secret Store	Optional	Credential store location; defaults to Strong Vault; learn more about Secret Store options
Username	Required	Username to utilize when connecting to this datasource; displays when Secret Store integration is not configured for your organization or when StrongDM serves as the Secret Store type
Password	Required	Password for the user connecting to this datasource; displays when Secret Store integration is not configured for your organization or when StrongDM serves as the Secret Store type
Username (path)	Required	Path to the secret in your Secret Store location (for example, path/to/credential?key=optionalKeyName where key argument is optional); required when using a non-StrongDM Secret Store type
Password (path)	Required	Path to the secret in your Secret Store location (for example, path/to/credential?key=optionalKeyName where key argument is optional); required when using a non-StrongDM Secret Store type
Replica Set	Optional	The name of the MongoDB replica set, which can be found in the Web UI or your shard prefix
TLS Required	Optional	Indicator to require StrongDM to use TLS to connect to the database
Connect to Replica?	Optional	Select this option if you would like StrongDM to connect to a secondary (read-only) replica instead of the primary node.
Resource Tags	Optional	Datasource Tags consisting of key-value pairs <KEY>=<VALUE> (for example, env=dev)

Secret Store options

By default, datasource credentials are stored in StrongDM. However, these credentials can also be saved in a secrets management tool.

Non-StrongDM options appear in the Secret Store dropdown if they are created under Network > Secret Stores. When you select another Secret Store type, its unique properties display. For more details, see Configure Secret Store Integrations.

Resource status

After a resource is created, the Admin UI displays that resource as unhealthy until the healthchecks run successfully. When the resource is ready, the Health icon indicates a positive, green status.

When the resource does not display a positive status, click the resource name to go to the Diagnostics tab and check for errors.

Test the Connection

After you have added your resource in StrongDM, follow these steps to verify that it’s working correctly.

1. Assign yourself access by ensuring that your user or role has access to the resource. In the StrongDM Admin UI, go to Access > Roles, and verify that the resource is attached to a role you’re in.

2. In the CLI, run sdm status to list the available datasources. Ensure that the resource appears in your list of accessible datasources.

3. Start a session to the resource, as in the following example:

   sdm connect mongo-replica-prod

4. Connect using a MongoDB client (for example, mongo shell or another client), specifying the hostname, port, username, password, replica set name, and authentication database. For example:

   mongo --host localhost:<PORT> --username $USERNAME --password $PASSWORD --authenticationDatabase admin --replicaSet rs0

5. Run a run a test command. For example:

   db.adminCommand({ping: 1})

6. In the StrongDM Admin UI, check Logs > Queries (and Logs > Connections) to verify that your session and operations were logged.

When these steps succeed, you’re ready to connect to your resource through StrongDM.

Client Connections

Due to the way MongoDB manages connections, when a user connects to a MongoDB resource via StrongDM, the specific node in the cluster that they are connected to may vary. Considerations such as whether that node is read-only are ignored, and the user will be connected to any node that's available in the cluster.

Help

If you still encounter issues, please consult the StrongDM Help Center.

Be prepared to provide the following information to StrongDM Support, so that they can inspect logs and confirm node and resource health:

• Resource name or ID

• CLI error output or logs

• Node name and region