Question 1

How do I deploy Docker-Rails to a cloud platform like AWS?

Accepted Answer

Use the provided docker-compose.production.yml as a base and adapt it for AWS services such as ECS or EKS, ensuring to set up RDS for PostgreSQL, ElastiCache for Redis, and S3 for file uploads as configured with Shrine. You'll also need to handle SSL and load balancing, possibly with tools like traefik mentioned in the README.

Question 2

Docker-Rails vs other Rails Docker templates: which is better for learning?

Accepted Answer

Docker-Rails is superior for understanding integrated production features like real-time updates and search, while minimal templates like 'rails/docked' are better for basic Docker setup. Choose based on whether you need depth in multi-service architecture or just a quick start.

Question 3

How does the real-time update feature work with ActionCable?

Accepted Answer

It uses Rails' ActionCable with Redis as the pub/sub backend to broadcast post changes; when a post is edited, ActionCable pushes updates to connected clients, which automatically refresh via JavaScript, as implemented in the app's channels and Stimulus controllers.

Question 4

Can I replace OpenSearch with Elasticsearch in this project?

Accepted Answer

Yes, because Searchkick supports both engines. You'd need to modify config/initializers/searchkick.rb to point to Elasticsearch and update the docker-compose file to use an Elasticsearch container, adjusting any OpenSearch-specific configurations accordingly.

Question 5

How to add custom user roles or permissions to the authentication system?

Accepted Answer

Since it uses the minimal Clearance gem, you'd have to extend the User model and controllers manually or swap in a more feature-rich gem like Devise. For authorization, consider integrating gems like Pundit or CanCanCan, which would require significant code changes.

Question 6

What are the trade-offs of using Alpine Ruby for production performance?

Accepted Answer

Alpine Ruby reduces image size but may have slightly slower runtime performance due to musl libc and fewer optimizations. For most web apps, this is negligible, but for CPU-heavy tasks, you might prefer the standard Ruby image and optimize size through other means like multi-stage builds.

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