Linking MySQL as a source

The MySQL connector can link your database tables to PostHog.

To link MySQL:

1. Go to the Data pipeline page and the sources tab in PostHog
2. Click New source and select MySQL
3. Enter your database connection details:
   • Host: The hostname or IP your database server like db.example.com or 123.132.1.100.
   • Port: The port your database server is listening to. The default is 3306.
   • Database: The name of the database you want like analytics_db.
   • User: The username with the necessary permissions to access the database.
   • Password: The password for the user.
   • Schema: The schema for your database where your tables are located. The default is public.
   • Use SSL: Whether to use SSL for the connection. Default is enabled.
4. If you need to connect through an SSH tunnel, enable and configure it (optional):
   • Tunnel host: The hostname of your SSH server.
   • Tunnel port: The port your SSH server is listening on.
   • Authentication type:
     • For password authentication, enter your SSH username and password.
     • For key-based authentication, enter your SSH username, private key, and optional passphrase.
5. Click Next

The data warehouse then starts syncing your MySQL data. You can see details and progress in the sources tab.

Configuration

Selecting columns

By default, PostHog syncs all columns from each table. To sync only specific columns:

1. During source setup, click Columns next to any table in the table picker.
2. Uncheck columns you don't want to sync.
3. Primary key columns and the incremental sync field (if configured) are always synced and cannot be disabled.

You can also change column selection after setup:

1. Go to the sources tab and click your MySQL source.
2. Click Configure next to any schema.
3. Under Columns, select which columns to sync.

Inbound IP addresses

We use a set of IP addresses to access your instance. To ensure this connector works, add these IPs to your inbound security rules: