Deployment & Production
Capistrano, Docker, Heroku, AWS, database.yml, credentials.yml.enc, precompile assets, zero-downtime deployments
1Which command should be used to precompile Rails assets before a production deployment?
Which command should be used to precompile Rails assets before a production deployment?
Answer
The rails assets:precompile command compiles all assets (JavaScript, CSS, images) into optimized files with fingerprinting for cache busting. This step is essential before any production deployment to ensure assets are ready to be served efficiently. The RAILS_ENV=production variable ensures compilation uses production settings.
2In which file does Rails 7+ store encrypted credentials for production?
In which file does Rails 7+ store encrypted credentials for production?
Answer
Rails 7+ uses config/credentials.yml.enc to store secrets in an encrypted manner. This file can be committed to the repository since it is encrypted with a master key. For specific environments, Rails also supports config/credentials/production.yml.enc with its own decryption key.
3What is the main role of Capistrano in a Rails deployment workflow?
What is the main role of Capistrano in a Rails deployment workflow?
Answer
Capistrano is a deployment automation tool that executes commands on remote servers via SSH. It manages releases with a symlink system enabling instant rollbacks, runs migrations, precompiles assets and restarts application servers. Its versioned releases approach simplifies deployment management.
How to access a credential stored in credentials.yml.enc from Rails code?
Which configuration in database.yml allows managing multiple read replicas for production?
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