Undefined method `instance' for Capistrano::Configuration:Class

Question

I am trying to get Capistrano up and running for the first time in a rails app. I have a linux server running Ubuntu 12.04, nginx, unicorn and rails, however, I seem to be r

Answer 1

First of all, there were a couple of changes made in capistrano 3. See the release notes : http://www.capistranorb.com/2013/06/01/release-announcement.html

Also go through the readme. https://github.com/capistrano/capistrano/blob/master/README.md

Capistrano 3 has moved out bundler integration into a gem.To solve your problem :

 1. Uncomment require 'capistrano/bundler' from capify. 
 2. add gem 'capistrano-bundler' to your gemfile.
 3. Go through the comments in capify file and uncomment whichever module you require.

Oh and if you don't wanna use bundler as of yet, remove the first line : require "bundler/capistrano". easy as that.

Also you can't use variables like the previous way now.Instead of directly reading it, use fetch(:application) to read a variable.

I would be easier for you to move back to capistrano v2.

Answer 2

For Capistrano 3, they recommend using http://github.com/capistrano/bundler

Its mentioned here https://github.com/bundler/bundler/blob/master/lib/bundler/capistrano.rb

Answer 3

I suspect this problem is because Bundler 1.3.5 is not compatible with the latest version of Capistrano. Try upgrading to the Bundler pre-releases: gem install bundler --pre.

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I noticed also that you're using a very old version of Rails 3.2, which is probably vulnerable to some security exploits. I would really strongly recommend upgrading that version of Rails to something more recent, like Rails 3.2.14.