Stefan Wienert • 11/14/2024

Rails: add maintenance (read-only) mode to move everything off to a new server

This technical article explains how to implement a sophisticated read-only maintenance mode for a Ruby on Rails application during a server migration. It covers simple 503 pages, Rack middleware limitations, and a detailed solution patching ActiveRecord and ActiveJob to block writes while allowing reads, using Redis for state management.

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#Ruby On Rails #Active Record #Maintenance Mode