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Configuring Fathom

All configuration in Fathom is optional. If you supply no configuration values then Fathom will default to using a SQLite database in the current working directory.

If you're already running MySQL or PostgreSQL on the server you're installing Fathom on, you'll most likely want to use one of those as your database driver.

To do so, either create a .env file in the working directory of your Fathom application or point Fathom to your configuration file by specifying the --config flag when starting Fathom.

fathom --config=/home/john/fathom.env server

The default configuration looks like this:


Accepted values & defaults

Name Default Description
FATHOM_DEBUG false If true will write more log messages.
FATHOM_SERVER_ADDR :8080 The server address to listen on
FATHOM_GZIP false if true will HTTP content gzipped
FATHOM_DATABASE_DRIVER sqlite3 The database driver to use: mysql, postgres or sqlite3
FATHOM_DATABASE_NAME The name of the database to connect to (or path to database file if using sqlite3)
FATHOM_DATABASE_USER Database connection user
FATHOM_DATABASE_PASSWORD Database connection password
FATHOM_DATABASE_HOST Database connection host
FATHOM_DATABASE_SSLMODE For a list of valid values, look here for Postgres and here for MySQL
FATHOM_DATABASE_URL Can be used to specify the connection string for your database, as an alternative to the previous 5 settings.
FATHOM_SECRET Random string, used for signing session cookies

Common issues

Fathom panics when trying to connect to Postgres: pq: SSL is not enabled on the server

This usually means that you're running Postgres without SSL enabled. Set the FATHOM_DATABASE_SSLMODE config option to remedy this.


When using FATHOM_DATABASE_URL to manually specify your database connection string, there are a few important things to consider.

  • When using MySQL, include ?parseTime=true&loc=Local in your DSN.
  • When using SQLite, include ?_loc=auto in your DSN.

Examples of valid values:

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