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Interface MongoOptions

Parsed Mongo Client Options.

User supplied options are documented by MongoClientOptions.

NOTE: The client's options parsing is subject to change to support new features. This type is provided to aid with inspection of options after parsing, it should not be relied upon programmatically.

Options are sourced from:

  • connection string
  • options object passed to the MongoClient constructor
  • file system (ex. tls settings)
  • environment variables
  • DNS SRV records and TXT records

Not all options may be present after client construction as some are obtained from asynchronous operations.

Hierarchy

  • Required<Pick<MongoClientOptions, "autoEncryption" | "connectTimeoutMS" | "directConnection" | "driverInfo" | "forceServerObjectId" | "minHeartbeatFrequencyMS" | "heartbeatFrequencyMS" | "keepAlive" | "keepAliveInitialDelay" | "localThresholdMS" | "maxConnecting" | "maxIdleTimeMS" | "maxPoolSize" | "minPoolSize" | "monitorCommands" | "noDelay" | "pkFactory" | "raw" | "replicaSet" | "retryReads" | "retryWrites" | "serverSelectionTimeoutMS" | "socketTimeoutMS" | "srvMaxHosts" | "srvServiceName" | "tlsAllowInvalidCertificates" | "tlsAllowInvalidHostnames" | "tlsInsecure" | "waitQueueTimeoutMS" | "zlibCompressionLevel">>
  • SupportedNodeConnectionOptions
    • MongoOptions

Index

Properties

Properties

Optional ALPNProtocols

ALPNProtocols?: string[] | Uint8Array | Uint8Array[]

An array of strings or a Buffer naming possible ALPN protocols. (Protocols should be ordered by their priority.)

Optional appName

appName?: string

Optional autoEncrypter

autoEncrypter?: AutoEncrypter

autoEncryption

autoEncryption: AutoEncryptionOptions

Optionally enable in-use auto encryption

remarks

Automatic encryption is an enterprise only feature that only applies to operations on a collection. Automatic encryption is not supported for operations on a database or view, and operations that are not bypassed will result in error (see libmongocrypt: Auto Encryption Allow-List). To bypass automatic encryption for all operations, set bypassAutoEncryption=true in AutoEncryptionOpts.

Automatic encryption requires the authenticated user to have the listCollections privilege action.

If a MongoClient with a limited connection pool size (i.e a non-zero maxPoolSize) is configured with AutoEncryptionOptions, a separate internal MongoClient is created if any of the following are true:

  • AutoEncryptionOptions.keyVaultClient is not passed.
  • AutoEncryptionOptions.bypassAutomaticEncryption is false.

If an internal MongoClient is created, it is configured with the same options as the parent MongoClient except minPoolSize is set to 0 and AutoEncryptionOptions is omitted.

Optional ca

ca?: string | Buffer | (string | Buffer)[]

Optionally override the trusted CA certificates. Default is to trust the well-known CAs curated by Mozilla. Mozilla's CAs are completely replaced when CAs are explicitly specified using this option.

Optional cert

cert?: string | Buffer | (string | Buffer)[]

Cert chains in PEM format. One cert chain should be provided per private key. Each cert chain should consist of the PEM formatted certificate for a provided private key, followed by the PEM formatted intermediate certificates (if any), in order, and not including the root CA (the root CA must be pre-known to the peer, see ca). When providing multiple cert chains, they do not have to be in the same order as their private keys in key. If the intermediate certificates are not provided, the peer will not be able to validate the certificate, and the handshake will fail.

Optional checkServerIdentity

checkServerIdentity?: (hostname: string, cert: PeerCertificate) => Error | undefined

Type declaration

    • (hostname: string, cert: PeerCertificate): Error | undefined

    • Verifies the certificate cert is issued to hostname.

      Returns Error object, populating it with reason, host, and cert on failure. On success, returns undefined.

      This function is intended to be used in combination with thecheckServerIdentity option that can be passed to connect and as such operates on a certificate object. For other purposes, consider using x509.checkHost() instead.

      This function can be overwritten by providing an alternative function as theoptions.checkServerIdentity option that is passed to tls.connect(). The overwriting function can call tls.checkServerIdentity() of course, to augment the checks done with additional verification.

      This function is only called if the certificate passed all other checks, such as being issued by trusted CA (options.ca).

      Earlier versions of Node.js incorrectly accepted certificates for a givenhostname if a matching uniformResourceIdentifier subject alternative name was present (see CVE-2021-44531). Applications that wish to acceptuniformResourceIdentifier subject alternative names can use a customoptions.checkServerIdentity function that implements the desired behavior.

      since

      v0.8.4

      Parameters

      • hostname: string

        The host name or IP address to verify the certificate against.

      • cert: PeerCertificate

        A certificate object representing the peer's certificate.

      Returns Error | undefined

Optional ciphers

ciphers?: string

Cipher suite specification, replacing the default. For more information, see modifying the default cipher suite. Permitted ciphers can be obtained via tls.getCiphers(). Cipher names must be uppercased in order for OpenSSL to accept them.

compressors

compressors: ("none" | "snappy" | "zlib" | "zstd")[]

connectTimeoutMS

connectTimeoutMS: number

The time in milliseconds to attempt a connection before timing out.

Optional credentials

credentials?: MongoCredentials

Optional crl

crl?: string | Buffer | (string | Buffer)[]

PEM formatted CRLs (Certificate Revocation Lists).

dbName

dbName: string

directConnection

directConnection: boolean

Allow a driver to force a Single topology type with a connection string containing one host

driverInfo

driverInfo: DriverInfo

Allows a wrapping driver to amend the client metadata generated by the driver to include information about the wrapping driver

Optional ecdhCurve

ecdhCurve?: string

A string describing a named curve or a colon separated list of curve NIDs or names, for example P-521:P-384:P-256, to use for ECDH key agreement. Set to auto to select the curve automatically. Use crypto.getCurves() to obtain a list of available curve names. On recent releases, openssl ecparam -list_curves will also display the name and description of each available elliptic curve. Default: tls.DEFAULT_ECDH_CURVE.

Optional family

family?: number

forceServerObjectId

forceServerObjectId: boolean

Force server to assign _id values instead of driver

heartbeatFrequencyMS

heartbeatFrequencyMS: number

heartbeatFrequencyMS controls when the driver checks the state of the MongoDB deployment. Specify the interval (in milliseconds) between checks, counted from the end of the previous check until the beginning of the next one.

Optional hints

hints?: number

hosts

hosts: HostAddress[]

keepAlive

keepAlive: boolean
deprecated

TCP Connection keep alive enabled. Will not be able to turn off in the future.

keepAliveInitialDelay

keepAliveInitialDelay: number
deprecated

The number of milliseconds to wait before initiating keepAlive on the TCP socket. Will not be configurable in the future.

Optional key

key?: string | Buffer | (string | Buffer | KeyObject)[]

Private keys in PEM format. PEM allows the option of private keys being encrypted. Encrypted keys will be decrypted with options.passphrase. Multiple keys using different algorithms can be provided either as an array of unencrypted key strings or buffers, or an array of objects in the form {pem: <string|buffer>[, passphrase: ]}. The object form can only occur in an array. object.passphrase is optional. Encrypted keys will be decrypted with object.passphrase if provided, or options.passphrase if it is not.

loadBalanced

loadBalanced: boolean

Optional localAddress

localAddress?: string

Optional localPort

localPort?: number

localThresholdMS

localThresholdMS: number

The size (in milliseconds) of the latency window for selecting among multiple suitable MongoDB instances.

Optional lookup

lookup?: LookupFunction

maxConnecting

maxConnecting: number

The maximum number of connections that may be in the process of being established concurrently by the connection pool.

maxIdleTimeMS

maxIdleTimeMS: number

The maximum number of milliseconds that a connection can remain idle in the pool before being removed and closed.

maxPoolSize

maxPoolSize: number

The maximum number of connections in the connection pool.

metadata

metadata: ClientMetadata

Optional minDHSize

minDHSize?: number

minHeartbeatFrequencyMS

minHeartbeatFrequencyMS: number

Sets the minimum heartbeat frequency. In the event that the driver has to frequently re-check a server's availability, it will wait at least this long since the previous check to avoid wasted effort.

minPoolSize

minPoolSize: number

The minimum number of connections in the connection pool.

monitorCommands

monitorCommands: boolean

Enable command monitoring for this client

noDelay

noDelay: boolean

TCP Connection no delay

Optional passphrase

passphrase?: string

Shared passphrase used for a single private key and/or a PFX.

Optional pfx

pfx?: string | Buffer | (string | Buffer | PxfObject)[]

PFX or PKCS12 encoded private key and certificate chain. pfx is an alternative to providing key and cert individually. PFX is usually encrypted, if it is, passphrase will be used to decrypt it. Multiple PFX can be provided either as an array of unencrypted PFX buffers, or an array of objects in the form {buf: <string|buffer>[, passphrase: ]}. The object form can only occur in an array. object.passphrase is optional. Encrypted PFX will be decrypted with object.passphrase if provided, or options.passphrase if it is not.

pkFactory

pkFactory: PkFactory

A primary key factory function for generation of custom _id keys

Optional proxyHost

proxyHost?: string

Optional proxyPassword

proxyPassword?: string

Optional proxyPort

proxyPort?: number

Optional proxyUsername

proxyUsername?: string

raw

raw: boolean

Enabling the raw option will return a Node.js Buffer which is allocated using allocUnsafe API. See this section from the Node.js Docs here for more detail about what "unsafe" refers to in this context. If you need to maintain your own editable clone of the bytes returned for an extended life time of the process, it is recommended you allocate your own buffer and clone the contents:

example
const raw = await collection.findOne({}, { raw: true });
const myBuffer = Buffer.alloc(raw.byteLength);
myBuffer.set(raw, 0);
// Only save and use `myBuffer` beyond this point
remarks

Please note there is a known limitation where this option cannot be used at the MongoClient level (see NODE-3946). It does correctly work at Db, Collection, and per operation the same as other BSON options work.

readConcern

readConcern: ReadConcern

readPreference

readPreference: ReadPreference

Optional rejectUnauthorized

rejectUnauthorized?: boolean

If true the server will reject any connection which is not authorized with the list of supplied CAs. This option only has an effect if requestCert is true.

default

true

replicaSet

replicaSet: string

Specifies the name of the replica set, if the mongod is a member of a replica set.

retryReads

retryReads: boolean

Enables retryable reads.

retryWrites

retryWrites: boolean

Enable retryable writes.

Optional secureContext

secureContext?: SecureContext

An optional TLS context object from tls.createSecureContext()

Optional secureProtocol

secureProtocol?: string

Legacy mechanism to select the TLS protocol version to use, it does not support independent control of the minimum and maximum version, and does not support limiting the protocol to TLSv1.3. Use minVersion and maxVersion instead. The possible values are listed as SSL_METHODS, use the function names as strings. For example, use 'TLSv1_1_method' to force TLS version 1.1, or 'TLS_method' to allow any TLS protocol version up to TLSv1.3. It is not recommended to use TLS versions less than 1.2, but it may be required for interoperability. Default: none, see minVersion.

serverApi

serverApi: ServerApi

serverSelectionTimeoutMS

serverSelectionTimeoutMS: number

Specifies how long (in milliseconds) to block for server selection before throwing an exception.

Optional servername

servername?: string

Optional session

session?: Buffer

socketTimeoutMS

socketTimeoutMS: number

The time in milliseconds to attempt a send or receive on a socket before the attempt times out.

Optional srvHost

srvHost?: string

srvMaxHosts

srvMaxHosts: number

The maximum number of hosts to connect to when using an srv connection string, a setting of 0 means unlimited hosts

srvServiceName

srvServiceName: string

Modifies the srv URI to look like:

_{srvServiceName}._tcp.{hostname}.{domainname}

Querying this DNS URI is expected to respond with SRV records

tls

tls: boolean

NOTE ABOUT TLS Options

If tls is provided as an option, it is equivalent to setting the ssl option.

NodeJS native TLS options are passed through to the socket and retain their original types.

Additional options:
nodejs native option driver spec compliant option name legacy option name driver option type
ca tlsCAFile sslCA string
crl N/A sslCRL string
cert tlsCertificateFile, tlsCertificateKeyFile sslCert string
key tlsCertificateKeyFile sslKey string
passphrase tlsCertificateKeyFilePassword sslPass string
rejectUnauthorized tlsAllowInvalidCertificates sslValidate boolean
checkServerIdentity tlsAllowInvalidHostnames N/A boolean
see note below tlsInsecure N/A boolean

If tlsInsecure is set to true, then it will set the node native options checkServerIdentity to a no-op and rejectUnauthorized to false.

If tlsInsecure is set to false, then it will set the node native options checkServerIdentity to a no-op and rejectUnauthorized to the inverse value of tlsAllowInvalidCertificates. If tlsAllowInvalidCertificates is not set, then rejectUnauthorized will be set to true.

tlsAllowInvalidCertificates

tlsAllowInvalidCertificates: boolean

Bypasses validation of the certificates presented by the mongod/mongos instance

tlsAllowInvalidHostnames

tlsAllowInvalidHostnames: boolean

Disables hostname validation of the certificate presented by the mongod/mongos instance.

tlsInsecure

tlsInsecure: boolean

Disables various certificate validations.

waitQueueTimeoutMS

waitQueueTimeoutMS: number

The maximum time in milliseconds that a thread can wait for a connection to become available.

writeConcern

writeConcern: WriteConcern

zlibCompressionLevel

zlibCompressionLevel: 0 | 3 | 9 | 4 | 1 | 2 | 5 | 6 | 7 | 8

An integer that specifies the compression level if using zlib for network compression.

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