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Database Configuration

Table of Contents

  1. Database Configuration
  2. PostgreSQL
    1. PostgreSQL with Docker
    2. PostgreSQL with a Separate Service

Database Configuration

The database configuration lives in config/database.yml. Inferno uses the Sequel gem to communicate with the database, which offers the following configuration options.


Inferno defaults to using SQLite, which is not suitable for use in a multi-user deployment. Multi-user deployments should use PostgreSQL instead.

PostgreSQL with Docker

Rather than setting up a separate PostgreSQL service, you can run it via docker-compose along with the rest of Inferno’s services. To do so:

  • Add gem 'pg' to Gemfile
  • Add the following entry to docker-compose.yml:
      image: postgres:14.1-alpine
      mem_limit: 600m
      restart: unless-stopped
        - ./data/pg:/var/lib/postgresql/data
        POSTGRES_DB: inferno_production
  • Add inferno_db to the depends_on for inferno and worker services in docker-compose.yml. For example:
      # ...
        - validator_service
        - inferno_db
      # ...
        - redis
        - inferno_db
  • Use the following for the production configuration in config/database.yml:
    adapter: postgres
    database: inferno_production
    max_connections: 10
    user: postgres
    host: inferno_db

PostgreSQL with a Separate Service

If you have an existing PostgreSQL service that you would like to use, you can use it with the following steps:

  • Add gem 'pg' to Gemfile
  • In config/database.yml, change the adapter in the production entry to postgres, and supply the database, user, password, host, and port for the PostgreSQL database