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Mongo DB

The MongoDB source allows to sync data from MongoDb. Source supports Full Refresh and Incremental sync strategies.

Resulting schema

MongoDB does not have anything like table definition, thus we have to define column types from actual attributes and their values. Discover phase have two steps:

Step 1. Find all unique properties

Connector select 10k documents to collect all distinct field.

Step 2. Determine property types

For each property found, connector determines its type, if all the selected values have the same type - connector will set appropriate type to the property. In all other cases connector will fallback to string type.

Features

Feature Supported
Full Refresh Sync Yes
Incremental - Append Sync Yes
Replicate Incremental Deletes No
Namespaces No

Full Refresh sync

Works as usual full refresh sync.

Incremental sync

Cursor field can not be nested. Currently only top level document properties are supported.

Cursor should never be blank. In case cursor is blank - the incremental sync results might be unpredictable and will totally rely on MongoDB comparison algorithm.

Only datetime and number cursor types are supported. Cursor type is determined based on the cursor field name:

  • datetime - if cursor field name contains a string from: time, date, _at, timestamp, ts
  • number - otherwise

Getting started

This guide describes in details how you can configure MongoDB for integration with Airbyte.

Create users

Run mongo shell, switch to admin database and create a READ_ONLY_USER. READ_ONLY_USER will be used for Airbyte integration. Please make sure that user has read-only privileges.

mongo
use admin;
db.createUser({user: "READ_ONLY_USER", pwd: "READ_ONLY_PASSWORD", roles: [{role: "read", db: "TARGET_DATABASE"}]})

Make sure the user have appropriate access levels.

Enable MongoDB authentication

Open /etc/mongod.conf and add/replace specific keys:

net:
  bindIp: 0.0.0.0

security:
  authorization: enabled

Binding to 0.0.0.0 will allow to connect to database from any IP address.

The last line will enable MongoDB security. Now only authenticated users will be able to access the database.

Configure firewall

Make sure that MongoDB is accessible from external servers. Specific commands will depend on the firewall you are using (UFW/iptables/AWS/etc). Please refer to appropriate documentation.

Your READ_ONLY_USER should now be ready for use with Airbyte.

TLS/SSL on a Connection

It is recommended to use encrypted connection. Connection with TLS/SSL security protocol for MongoDb Atlas Cluster and Replica Set instances is enabled by default. To enable TSL/SSL connection with Standalone MongoDb instance, please refer to MongoDb Documentation.

Сonfiguration Parameters

  • Database: database name
  • Authentication Source: specifies the database that the supplied credentials should be validated against. Defaults to admin.
  • User: username to use when connecting
  • Password: used to authenticate the user
  • Standalone MongoDb instance
    • Host: URL of the database
    • Port: Port to use for connecting to the database
    • TLS: indicates whether to create encrypted connection
  • Replica Set
    • Server addresses: the members of a replica set
    • Replica Set: A replica set name
  • MongoDb Atlas Cluster
    • Cluster URL: URL of a cluster to connect to

For more information regarding configuration parameters, please see MongoDb Documentation.

Changelog

Version Date Pull Request Subject
0.1.13 2022-02-21 10276 Create a custom codec registry to handle DBRef MongoDB objects
0.1.12 2022-02-14 10256 (unpublished) Add -XX:+ExitOnOutOfMemoryError JVM option
0.1.11 2022-01-10 9238 Return only those collections for which the user has privileges
0.1.10 2021-12-30 9202 Update connector fields title/description
0.1.9 2021-12-07 8491 Configure 10000 limit doc reading during Discovery step
0.1.8 2021-11-29 8306 Added milliseconds for date format for cursor
0.1.7 2021-11-22 8161 Updated Performance and updated cursor for timestamp type
0.1.5 2021-11-17 8046 Added milliseconds to convert timestamp to datetime format
0.1.4 2021-11-15 7982 Updated Performance
0.1.3 2021-10-19 7160 Fixed nested document parsing
0.1.2 2021-10-07 6860 Added filter to avoid MongoDb system collections
0.1.1 2021-09-21 6364 Source MongoDb: added support via TLS/SSL
0.1.0 2021-08-30 5530 New source: MongoDb ported to java