为什么将 Ruby 站点迁移到新服务器时会出错？

Question

我正在尝试将 Ruby 服务器迁移到新服务器。我在其mongrel.log 文件中看到了错误：

/usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:in gem_original_require: no such file to load -- yahoo-weather (MissingSourceFile)
from /usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:in require
from /usr/lib/ruby/gems/1.8/gems/activesupport-2.3.14/lib/active_support/dependencies.rb:184:in require
from /home/dianahot/rails_apps/dianahotels/config/initializers/included_libraries.rb:9
from /usr/lib/ruby/gems/1.8/gems/activesupport-2.3.14/lib/active_support/dependencies.rb:173:in load_without_new_constant_marking
from /usr/lib/ruby/gems/1.8/gems/activesupport-2.3.14/lib/active_support/dependencies.rb:173:in load
from /usr/lib/ruby/gems/1.8/gems/rails-2.3.14/lib/initializer.rb:622:in load_application_initializers
from /usr/lib/ruby/gems/1.8/gems/rails-2.3.14/lib/initializer.rb:621:in each
from /usr/lib/ruby/gems/1.8/gems/rails-2.3.14/lib/initializer.rb:621:in load_application_initializers
from /usr/lib/ruby/gems/1.8/gems/rails-2.3.14/lib/initializer.rb:176:in process
from /usr/lib/ruby/gems/1.8/gems/rails-2.3.14/lib/initializer.rb:113:in send
from /usr/lib/ruby/gems/1.8/gems/rails-2.3.14/lib/initializer.rb:113:in run
from /home/dianahot/rails_apps/dianahotels/config/environment.rb:12
from /usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:in gem_original_require
from /usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:in require
from /usr/lib/ruby/gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel/rails.rb:147:in rails
from /usr/lib/ruby/gems/1.8/gems/mongrel-1.1.5/bin/mongrel_rails:113:in cloaker_
from /usr/lib/ruby/gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel/configurator.rb:149:in call
from /usr/lib/ruby/gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel/configurator.rb:149:in listener
from /usr/lib/ruby/gems/1.8/gems/mongrel-1.1.5/bin/mongrel_rails:99:in cloaker_
from /usr/lib/ruby/gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel/configurator.rb:50:in call
from /usr/lib/ruby/gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel/configurator.rb:50:in initialize
from /usr/lib/ruby/gems/1.8/gems/mongrel-1.1.5/bin/mongrel_rails:84:in new
from /usr/lib/ruby/gems/1.8/gems/mongrel-1.1.5/bin/mongrel_rails:84:in run
from /usr/lib/ruby/gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel/command.rb:212:in run
from /usr/lib/ruby/gems/1.8/gems/mongrel-1.1.5/bin/mongrel_rails:281
from /usr/bin/mongrel_rails:23:in load
from /usr/bin/mongrel_rails:23

这些行是什么意思？

---

编辑：

我尝试手动安装 yahoo-weather gem，但出现以下错误：

gem install yahoo-weather
Fetching: nokogiri-1.5.2.gem (100%)
Building native extensions.  This could take a while...
ERROR:  Error installing yahoo-weather:
        ERROR: Failed to build gem native extension.

        /usr/bin/ruby extconf.rb
checking for libxml/parser.h... yes
checking for libxslt/xslt.h... no
-----
libxslt is missing.  please visit http://nokogiri.org/tutorials/installing_nokogiri.html for help with installing dependencies.
-----
*** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of
necessary libraries and/or headers.  Check the mkmf.log file for more
details.  You may need configuration options.

Provided configuration options:
        --with-opt-dir
        --without-opt-dir
        --with-opt-include
        --without-opt-include=${opt-dir}/include
        --with-opt-lib
        --without-opt-lib=${opt-dir}/lib
        --with-make-prog
        --without-make-prog
        --srcdir=.
        --curdir
        --ruby=/usr/bin/ruby
        --with-zlib-dir
        --without-zlib-dir
        --with-zlib-include
        --without-zlib-include=${zlib-dir}/include
        --with-zlib-lib
        --without-zlib-lib=${zlib-dir}/lib
        --with-iconv-dir
        --without-iconv-dir
        --with-iconv-include
        --without-iconv-include=${iconv-dir}/include
        --with-iconv-lib
        --without-iconv-lib=${iconv-dir}/lib
        --with-xml2-dir
        --without-xml2-dir
        --with-xml2-include
        --without-xml2-include=${xml2-dir}/include
        --with-xml2-lib
        --without-xml2-lib=${xml2-dir}/lib
        --with-xslt-dir
        --without-xslt-dir
        --with-xslt-include
        --without-xslt-include=${xslt-dir}/include
        --with-xslt-lib
        --without-xslt-lib=${xslt-dir}/lib


Gem files will remain installed in /usr/lib/ruby/gems/1.8/gems/nokogiri-1.5.2 for inspection.
Results logged to /usr/lib/ruby/gems/1.8/gems/nokogiri-1.5.2/ext/nokogiri/gem_make.out
root@server2 [/usr/lib/ruby/gems/1.8/gems]# % gem install yahoo-weather
-bash: fg: %: no such job
root@server2 [/usr/lib/ruby/gems/1.8/gems]#

Answer 1

你猜，你错过了雅虎天气宝石。

我强烈建议您使用bundler - 它可以更轻松地将应用程序部署到具有所有依赖项的一致版本的新机器上。

Answer 2

Yahoo-weather gem 安装失败，因为它对 Nokogiri 的依赖失败。发生这种情况是因为：

libxslt is missing.  please visit http://nokogiri.org/tutorials/installing_nokogiri.html for help with installing dependencies.

根据错误输出中列出的路径名，我怀疑您使用的是 Linux 系统。您需要确保安装了适当的 libxml 和 libxslt。 Nokogiri 页面应该有助于解决这个问题。