README

It's a Rails application using Docker, oracle_enhanced adapter, MRI Ruby 2.5.0.

1. Download the following zip archives from Oracle Instant Client download page:

• instantclient-basiclite-linux.x64-12.2.0.1.0.zip
• instantclient-sdk-linux.x64-12.2.0.1.0.zip
• instantclient-sqlplus-linux.x64-12.2.0.1.0.zip

2. Copy the above 3 archives into <RAILS_APP_>/vendor folder.
3. Open your Terminal and cd to the rails project.
4. Start Docker if it is not running.
5. Update database.yml configuration for your database, I used Figaro gem to keep ENV variables.
6. Run docker build -t <name_you_like> .
7. ruby-oci8 gem should be installed without errors.
8. Run docker run -p 3000:3000 <name_you_put_in_step_6 to start the rails app in the Docker container
9. Navigate to localhost:3000 in your preferred browser.

For more details and options see installation instructions in ruby-oci docs