capistrano – NameError：未初始化的常量Net :: SSH :: KnownHosts :: SUPPORTED_TYPE

我正在尝试将我的Rails（3.1.3）应用程序部署到preprod env。 我使用capistrano（2.12.0）和rvm-capistrano（1.2.2）。

当我调用bundle exec cap ssh它工作正常。 但是当我调用bundle exec cap deploy我得到以下跟踪：

 $ cap deploy triggering start callbacks for `deploy' * 18:42:19 == Currently executing `multistage:ensure' *** Defaulting to `preprod' * 18:42:19 == Currently executing `preprod' * 18:42:19 == Currently executing `deploy' * 18:42:19 == Currently executing `deploy:update' ** transaction: start * 18:42:19 == Currently executing `deploy:update_code' * 18:42:19 == Currently executing `deploy:set_previous_revision' * executing "cd /rails_apps/com.example.preprod/current; git rev-parse --short HEAD" servers: ["preprod.example.com"] connection failed for: preprod.example.com (NameError: uninitialized constant Net::SSH::KnownHosts::SUPPORTED_TYPE) 

当然， example.com是占位符，它不是来自capistrano配置中的错误。

任何可能导致这种情况的想法？

我正在使用RVM和Ruby 1.9.3-p194。

谢谢 ！

Answer 1

从net-ssh 2.5.1恢复到2.4.0似乎现在解决了这个问题。

Answer 2

我安装了rvm-capistrano gem来解决这个问题：

gem install rvm-capistrano