How to change Rails 3 server default port in develoment

Question

On my development machine  I use port 10524  So I start my server this way    rails s -p 10524   Is there a way to change the default port to 10524 so I wouldn t have to append the port each time I start the server

User · Answer

I like to append the following to config boot rb   require  rails commands server   module Rails   class Server     alias  default options alias  default options     def default options       default options alias merge   Port   gt  3333      end       end end

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Create alias in your shell for command with a specified port

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First - do not edit anything in your gem path  It will influence all projects  and you will have a lot problems later     In your project edit script rails this way      usr bin env ruby   This command will automatically be run when you run  rails  with Rails 3 gems installed from the root of your application   APP PATH   File expand path        config application      FILE    require File expand path        config boot      FILE       THIS IS NEW  require  rails commands server  module Rails   class Server     def default options       super merge            Port          gt  10524           environment   gt   ENV  RAILS ENV       development   dup           daemonize     gt  false           debugger      gt  false           pid           gt  File expand path  tmp pids server pid             config        gt  File expand path  config ru                end   end end   END OF CHANGE require  rails commands    The principle is simple - you are monkey-patching the server runner - so it will influence just one project   UPDATE  Yes  I know that the there is simpler solution with bash script containing      bin bash rails server -p 10524   but this solution has a serious drawback - it is boring as hell

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You could install   gem install foreman  and use foreman to start your server as defined in your Procfile like    web  bundle exec rails -p 10524   You can check foreman gem docs here  https   github com ddollar foreman for more info  The benefit of this approach is not only can you set change the port in the config easily and that it doesn t require much code to be added but also you can add different steps in the Procfile that foreman will run for you so you don t have to go though them each time you want to start you application something like   bundle  bundle install web  bundle exec rails -p 10524           Cheers

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Combining two previous answers  for Rails 4 0 4  and up  presumably   this suffices at the end of config boot rb   require  rails commands server   module Rails   class Server     def default options       super merge  Port  10524       end   end end

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Inspired by Radek and Spencer    On Rails 4  0 2 - Ruby 2 1 0    I was able to append this to config boot rb     config boot rb       existing code  require  rails commands server   module Rails     Override default development     Server port   class Server     def default options       super merge Port  3100      end   end end   All other configuration in default options are still set  and command-line switches still override defaults

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If you re using puma  I m using this on Rails 6    To change default port for all environments  The  quot  3000  quot  part sets the default port if undefined in ENV    config puma rb  change      port ENV fetch  PORT     3000   for      port ENV fetch  PORT     10524    To define it depending on the environment  using Figaro gem for credentials environment variable    application yml local db username  your user name  local db password  your password PORT  10524  You can adapt this to you own environment variable manager

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We re using Puma as a web server  and dotenv to set environment variables in development  This means I can set an environment variable for PORT  and reference it in the Puma config      env PORT 10524     config puma rb port ENV  PORT     However  you ll have to start your app with foreman start instead of rails s  otherwise the puma config doesn t get read properly   I like this approach because the configuration works the same way in development and production  you just change the value of the port if necessary

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Solution for Rails 2 3 - script server      usr bin env ruby require  rack handler  module Rack  Handler   class  lt  lt  WEBrick     alias method  old run   run   end    class WEBrick     def self run app  options           options  Port    3010 if options  Port     3000       old run app  options      end   end end  require File dirname   FILE           config boot  require  commands server

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One more idea for you  Create a rake task that calls rails server with the -p    task  start    gt   environment do   system  rails server -p 3001  end   then call rake start instead of rails server

[ruby-on-rails] How to change Rails 3 server default port in develoment?

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