db.rotateCertificates()

Definition

db.rotateCertificates(message)

Rotates the currently used TLS certificates for a mongod or mongos to use the updated values for these certificates defined in the configuration file.

db.rotateCertificates(message)

The db.rotateCertificates() method takes the following optional argument:

Parameter	Type	Description
message	string	optional A message logged by the server to the log file and audit file.

The db.rotateCertificates() method wraps the rotateCertificates command.

Output

The db.rotateCertificates() method returns a document with the following field:

Behavior

Rotation includes the following certificates:

• TLS Certificates

• CRL (Certificate Revocation List) files (on Linux and Windows platforms)

• CA (Certificate Authority) files

To rotate one or more of these certificates:

1. Replace the certificate or certificates you wish to rotate on the filesystem, noting the following constraints:

   • Each new certificate must have the same filename and same filepath as the certificate it is replacing.

   • If rotating an encrypted TLS Certificate, its password must be the same as the password for the old certificate (as specified to the certificateKeyFilePassword configuration file setting). Certificate rotation does not support the interactive password prompt.

2. Connect mongosh to the mongod or mongos instance that you wish to perform certificate rotation on.

3. Run db.rotateCertificates() to rotate the certificates used by the mongod or mongos instance.

When certificate rotation takes place:

• Existing connections to the mongod or mongos instance are not terminated, and will continue to use the old certificates.

• Any new connections will use the new certificates.

If you have configured OCSP for your deployment, the db.rotateCertificates() method will also fetch stapled OCSP responses during rotation.

The db.rotateCertificates() method may be run on a running mongod or mongos regardless of replication status.

Only one instance of db.rotateCertificates() or rotateCertificates may run on each mongod or mongos process at a time. Attempting to initiate a second instance while one is already running will result in an error.

Incorrect, expired, revoked, or missing certificate files will cause the certificate rotation to fail, but will not invalidate the existing TLS configuration or terminate the running mongod or mongos process.

If the mongod or mongos is running with --tlsCertificateSelector set to thumbprint, db.rotateCertificates() will fail and write a warning message to the log file.

Logging

On successful rotation, the subject names, thumbprints, and the validity period of the server and cluster certificate thumbprints are logged to the configured log destination. If auditing is enabled, this information is also written to the audit log.

On Linux and Windows platforms, if a CRL file is present, its thumbprint and validity period are also logged to these locations.

Required Access

You must have the rotateCertificates action in order to use the db.rotateCertificates() method. The rotateCertificates action is part of the hostManager role.

Example

The following operation rotates the certificates on a running mongod instance, after having made the appropriate updates to the configuration file to specify the updated certificate information:

db.rotateCertificates()

The following performs the same as above, but also writes a custom log message at rotation time to the log file and audit file:

db.rotateCertificates("message": "Rotating certificates")