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Encryption at Rest using Customer Key Management

Encryption at Rest using Customer Key Management¶

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Configure Atlas with Customer Key Management
Encrypted Backups

Atlas encrypts all cluster storage and snapshot volumes, securing all cluster data on disk: a concept known as encryption at rest.

Atlas Project Owners can configure an additional layer of encryption on their data using their Atlas-compatible customer key management provider with the MongoDB encrypted storage engine.

Configuring Encryption at Rest using your Key Management incurs additional charges for the Atlas project. To learn more, see Advanced Security.

Atlas Project Owners can use one or more of the following customer key management providers when configuring Encryption at Rest for the Atlas project:

After configuring at least one key management provider for the Atlas project, Project Owners can enable customer key management for each Atlas cluster for which they require encryption. The key management provider does not have to match the cluster cloud service provider.

Atlas cannot rotate customer-managed encryption keys. Refer to your key management provider’s documentation for guidance on key rotation. When you set customer key management in a project, Atlas creates a 365-day key rotation alert.

Configure Atlas with Customer Key Management¶

Encryption at Rest using Key Management requires valid key management provider credentials and an encryption key. To provide these details and enable Customer Key Management:

1

Navigate to the Advanced page for your project.¶

If it is not already displayed, select the organization that contains your desired project from the office icon Organizations menu in the navigation bar.
If it is not already displayed, select your desired project from the Projects menu in the navigation bar.
Click Advanced in the sidebar.

2

Toggle the button next to Encryption at Rest using your Key Management to On.¶

3

Enter your key management provider account credentials and provide an encryption key.¶

4

Click Save.¶

Validate your KMS Configuration¶

Atlas validates your KMS configuration:

When you add or update credentials.
Every 15 minutes.
On-demand with the Encryption at Rest API endpoint.

If your key management provider credentials become invalid or if your encryption key is disabled or deleted, Atlas shuts down all mongod and mongos processes on the next scheduled validity check. Atlas sends an email to the Project Owner listing all affected clusters. The Atlas Clusters page reflects that your clusters are disabled due to invalid Encryption at Rest settings.

You can’t read or write data on disabled clusters. You can submit updates to disabled clusters, such as disk and instance size changes, that are processed when your encryption key is restored. Atlas will continue to perform maintenance and apply security patches. Disabled clusters retain all your data, so billing continues.

Virtual Machine Power

While a cluster is disabled, Atlas does not stop the Virtual Machine (VM) the cluster is running on. Atlas may perform patches that reboot the server, but VM power is not cycled.

To regain access to your data:

Update your credentials if they have changed since configuring Atlas with Customer Key Management.
Restore your key if it has been disabled or deleted.

The Try Again button is to the right of the Customer Master Key ID field in Atlas Advanced Security settings

After updating your configuration, click Try Again to validate it. If you don’t, Atlas validates on its next scheduled check. All mongod and mongos processes restart after Atlas determines your configuration to be valid.

Warning

If your key was deleted, restore that key to regain access to your clusters. You cannot change a key or disable Encryption at Rest using Customer Key Management without a valid key.

Restore a Deleted Key¶

To restore a deleted key, see your key management provider’s documentation:

AWS KMS: Deleting Customer Master Keys
Azure Key Vault: Recover Deleted Key
GCP KMS: Destroying and restoring key versions

Encrypted Backups¶

Atlas encrypts all snapshot volumes. This secures your cluster data on disk. Using your cloud provider’s KMS, you can:

Encrypt your snapshot storage volumes where you store your backups.
Encrypt the data files in your snapshots.
Restore snapshots with the key that was active at the time the snapshot was taken.
Encrypt PIT restore oplog data.

You cannot restore snapshots encrypted with keys that have become invalid.

You cannot enable Legacy Backups on clusters encrypted with keys that you manage. You can specify a base snapshot schedule that backs up every 6 hours.

To learn more about customer key management and Cloud Backups, see Encryption at Rest using Customer Key Management and Restore a Snapshot of a Cluster with Encryption at Rest.

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