当我在Centos 5.5上为我的Rails 3项目运行捆绑安装时，它失败了，出现了一个错误:
Gem::RemoteFetcher::FetchError: SSL_connect returned=1 errno=0 state=SSLv3
read server certificate B: certificate verify failed
(https://bb-m.rubygems.org/gems/multi_json-1.3.2.gem)
An error occured while installing multi_json (1.3.2), and Bundler cannot continue.
Make sure that `gem install multi_json -v '1.3.2'` succeeds before bundling.
当我尝试手动安装gem(通过gem install multi_json -v '1.3.2')它工作。同样的问题也发生在其他宝石上。我使用RVM (1.12.3)， ruby 1.9.2, bundle 1.1.3。
如何解决?
简单的复制粘贴指令这里给出关于.pem文件
https://gist.github.com/luislavena/f064211759ee0f806c88
证书验证失败
If you've read the previous sections, you will know what this means (and shame > on you if you have not).
We need to download AddTrustExternalCARoot-2048.pem.
Open a Command Prompt and type in:
C:>gem which rubygems
C:/Ruby21/lib/ruby/2.1.0/rubygems.rb
Now, let's locate that directory. From within the same window, enter the path part up to the file extension, but using backslashes instead:
C:>start C:\Ruby21\lib\ruby\2.1.0\rubygems
This will open a Explorer window inside the directory we indicated.
Step 3: Copy new trust certificate
Now, locate ssl_certs directory and copy the .pem file we obtained from previous step inside.
It will be listed with other files like GeoTrustGlobalCA.pem.
在Ubuntu 12.04上，我得到了一个稍微不同的错误，尽管可能相关:
Gem::RemoteFetcher::FetchError: SSL_connect returned=1 errno=0 state=unknown state: sslv3 alert handshake failure (https://d2chzxaqi4y7f8.cloudfront.net/gems/activesupport-3.2.3.gem)
An error occured while installing activesupport (3.2.3), and Bundler cannot continue.
Make sure that `gem install activesupport -v '3.2.3'` succeeds before bundling.
当我在Gemfile中使用源文件“https://rubygems.org”运行bundle install时，就会发生这种情况。
这是Ubuntu 12.04上OpenSSL的一个问题。参见Rubygems第319期。
要解决这个问题，请在Ubuntu 12.04上运行apt-get update && apt-get upgrade来升级您的OpenSSL。
