我正在尝试根据他们的安装指南 http://www.locomotivecms.com/support/installation/heroku 在 heroku 上部署机车 CMS。我将资产上传到 S3 存储桶。因此，在本地主机上它工作正常，但是在 heroku 上访问该站点时会显示一条错误消息：
An error occurred in the application and your page could not be served. Please try again in a few moments. If you are the application owner, check your logs for details.
我检查了 heroku 日志：
2011-05-23T11:12:25+00:00 heroku[web.1]: Starting process with command: `thin -p 29674 -e production -R /home/heroku_rack/heroku.ru start`
2011-05-23T11:12:30+00:00 app[web.1]: Jammit Warning: Asset compression disabled -- Java unavailable.
2011-05-23T11:12:34+00:00 app[web.1]: /app/.bundle/gems/ruby/1.8/gems/mongo-1.3.1/lib/../lib/mongo/connection.rb:518:in `connect': Failed to connect to a master node at localhost:27017 (Mongo::ConnectionFailure)
2011-05-23T11:12:34+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/mongo-1.3.1/lib/../lib/mongo/connection.rb:656:in `setup'
2011-05-23T11:12:34+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/mongo-1.3.1/lib/../lib/mongo/connection.rb:101:in `initialize'
2011-05-23T11:12:34+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/mongo-1.3.1/lib/../lib/mongo/connection.rb:152:in `new'
2011-05-23T11:12:34+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/mongo-1.3.1/lib/../lib/mongo/connection.rb:152:in `from_uri'
2011-05-23T11:12:34+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/mongoid-2.0.1/lib/mongoid/config/database.rb:86:in `master'
2011-05-23T11:12:34+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/mongoid-2.0.1/lib/mongoid/config/database.rb:19:in `configure'
2011-05-23T11:12:34+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/mongoid-2.0.1/lib/mongoid/config.rb:319:in `configure_databases'
2011-05-23T11:12:34+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/mongoid-2.0.1/lib/mongoid/config.rb:114:in `from_hash'
2011-05-23T11:12:34+00:00 app[web.1]: from (eval):2:in `send'
2011-05-23T11:12:34+00:00 app[web.1]: from (eval):2:in `from_hash'
2011-05-23T11:12:34+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/mongoid-2.0.1/lib/mongoid/railtie.rb:66
2011-05-23T11:12:34+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/railties-3.0.7/lib/rails/initializable.rb:25:in `instance_exec'
2011-05-23T11:12:34+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/railties-3.0.7/lib/rails/initializable.rb:25:in `run'
2011-05-23T11:12:34+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/railties-3.0.7/lib/rails/initializable.rb:50:in `run_initializers'
2011-05-23T11:12:34+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/railties-3.0.7/lib/rails/initializable.rb:49:in `each'
2011-05-23T11:12:34+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/railties-3.0.7/lib/rails/initializable.rb:49:in `run_initializers'
2011-05-23T11:12:34+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/railties-3.0.7/lib/rails/application.rb:134:in `initialize!'
2011-05-23T11:12:34+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/railties-3.0.7/lib/rails/application.rb:77:in `send'
2011-05-23T11:12:34+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/railties-3.0.7/lib/rails/application.rb:77:in `method_missing'
2011-05-23T11:12:34+00:00 app[web.1]: from /app/config/environment.rb:5
2011-05-23T11:12:34+00:00 app[web.1]: from /usr/ruby1.8.7/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require'
2011-05-23T11:12:34+00:00 app[web.1]: from /usr/ruby1.8.7/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require'
2011-05-23T11:12:34+00:00 app[web.1]: from config.ru:3
2011-05-23T11:12:34+00:00 heroku[web.1]: Process exited
2011-05-23T04:12:35-07:00 heroku[web.1]: State changed from starting to crashed
2011-05-23T11:12:35+00:00 heroku[router]: Error H10 (App crashed) -> GET morning-night-832.heroku.com/ dyno=none queue=0 wait=0ms service=0ms bytes=0
2011-05-23T04:12:36-07:00 heroku[nginx]: GET / HTTP/1.1 | 80.218.114.86 | 795 | http | 503
2011-05-23T11:12:36+00:00 heroku[router]: Error H10 (App crashed) -> GET morning-night-832.heroku.com/favicon.ico dyno=none queue=0 wait=0ms service=0ms bytes=0
2011-05-23T11:12:39+00:00 heroku[router]: Error H10 (App crashed) -> GET morning-night-832.heroku.com/favicon.ico dyno=none queue=0 wait=0ms service=0ms bytes=0
2011-05-23T11:30:06+00:00 heroku[router]: Error H10 (App crashed) -> GET morning-night-832.heroku.com/ dyno=none queue=0 wait=0ms service=0ms bytes=0
看起来，卡米特和资产存在问题。
2011-05-23T11:12:30+00:00 app[web.1]: Jammit Warning: Asset compression disabled -- Java unavailable.
直到现在，我才在谷歌上找到任何有用的提示。有什么想法可以解决这个问题吗？
更新：我改编了mongoid.yml，但仍然收到与上述相同的错误消息。我再次检查了日志：
2011-05-23T12:02:56+00:00 heroku[web.1]: Starting process with command: `thin -p 41882 -e production -R /home/heroku_rack/heroku.ru start`
2011-05-23T12:03:00+00:00 app[web.1]: Jammit Warning: Asset compression disabled -- Java unavailable.
2011-05-23T12:03:01+00:00 app[web.1]: /app/.bundle/gems/ruby/1.8/gems/rest-client-1.6.1/lib/restclient/abstract_response.rb:48:in `return!': 401 Unauthorized (RestClient::Request::Unauthorized)
2011-05-23T12:03:01+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/rest-client-1.6.1/lib/restclient/request.rb:220:in `process_result'
2011-05-23T12:03:01+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/rest-client-1.6.1/lib/restclient/request.rb:169:in `transmit'
2011-05-23T12:03:01+00:00 app[web.1]: from /usr/ruby1.8.7/lib/ruby/1.8/net/http.rb:543:in `start'
2011-05-23T12:03:01+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/rest-client-1.6.1/lib/restclient/request.rb:166:in `transmit'
2011-05-23T12:03:01+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/rest-client-1.6.1/lib/restclient/request.rb:60:in `execute'
2011-05-23T12:03:01+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/rest-client-1.6.1/lib/restclient/request.rb:31:in `execute'
2011-05-23T12:03:01+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/rest-client-1.6.1/lib/restclient/resource.rb:54:in `get'
2011-05-23T12:03:01+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/heroku-1.19.1/lib/heroku/client.rb:540:in `send'
2011-05-23T12:03:01+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/heroku-1.19.1/lib/heroku/client.rb:540:in `process'
2011-05-23T12:03:01+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/heroku-1.19.1/lib/heroku/client.rb:522:in `get'
2011-05-23T12:03:01+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/heroku-1.19.1/lib/heroku/client.rb:113:in `list_domains'
2011-05-23T12:03:01+00:00 app[web.1]: from /app/lib/locomotive/hosting/heroku.rb:41:in `enable_heroku'
2011-05-23T12:03:01+00:00 app[web.1]: from /app/config/initializers/../../lib/locomotive.rb:89:in `configure_hosting'
2011-05-23T12:03:01+00:00 app[web.1]: from /app/config/initializers/../../lib/locomotive.rb:57:in `after_configure'
2011-05-23T12:03:01+00:00 app[web.1]: from /app/config/initializers/../../lib/locomotive.rb:47:in `configure'
2011-05-23T12:03:01+00:00 app[web.1]: from /app/config/initializers/locomotive.rb:3
2011-05-23T12:03:01+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/activesupport-3.0.7/lib/active_support/dependencies.rb:235:in `load'
2011-05-23T12:03:01+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/activesupport-3.0.7/lib/active_support/dependencies.rb:235:in `load'
2011-05-23T12:03:01+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/activesupport-3.0.7/lib/active_support/dependencies.rb:227:in `load_dependency'
2011-05-23T12:03:01+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/activesupport-3.0.7/lib/active_support/dependencies.rb:235:in `load'
2011-05-23T12:03:01+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/railties-3.0.7/lib/rails/engine.rb:201
2011-05-23T12:03:01+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/railties-3.0.7/lib/rails/engine.rb:200:in `each'
2011-05-23T12:03:01+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/railties-3.0.7/lib/rails/engine.rb:200
2011-05-23T12:03:01+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/railties-3.0.7/lib/rails/initializable.rb:25:in `instance_exec'
2011-05-23T12:03:01+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/railties-3.0.7/lib/rails/initializable.rb:25:in `run'
2011-05-23T12:03:01+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/railties-3.0.7/lib/rails/initializable.rb:50:in `run_initializers'
2011-05-23T12:03:01+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/railties-3.0.7/lib/rails/initializable.rb:49:in `each'
2011-05-23T12:03:01+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/railties-3.0.7/lib/rails/application.rb:134:in `initialize!'
2011-05-23T12:03:01+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/railties-3.0.7/lib/rails/initializable.rb:49:in `run_initializers'
2011-05-23T12:03:01+00:00 heroku[web.1]: Process exited
2011-05-23T05:03:03-07:00 heroku[nginx]: GET / HTTP/1.1 | 80.218.114.86 | 795 | http | 503
我想这次是以下几行的问题：
2011-05-23T12:03:01+00:00 app[web.1]: /app/.bundle/gems/ruby/1.8/gems/rest-client-1.6.1/lib/restclient/abstract_response.rb:48:in `return!': 401 Unauthorized (RestClient::Request::Unauthorized)
我建议我需要再次配置我的 heroku 登录名和密码。让我们试试...
更新2：仍然不起作用。在我的mongoid.yml配置下面
defaults: &defaults
host: localhost
port: 27017
# slaves:
# - host: slave1.local
# port: 27018
# - host: slave2.local
# port: 27019
development:
<<: *defaults
database: locomotive_dev
test:
<<: *defaults
database: locomotive_test
# set these environment variables on your prod server
production:
# <<: *defaults
# database: locomotive_prod
# other settings for production
# host: <%= ENV['MONGOID_HOST'] %>
# port: <%= ENV['MONGOID_PORT'] %>
# username: <%= ENV['MONGOID_USERNAME'] %>
# password: <%= ENV['MONGOID_PASSWORD'] %>
# database: <%= ENV['MONGOID_DATABASE'] %>
#heroku
uri: <%= ENV['MONGOHQ_URL'] %>
# bushido (mongohq_url will also work)
# uri: <%= ENV['MONGODB_URL'] %>
我在配置/初始值设定项/locomotive.rb 中的设置
require File.dirname(__FILE__) + '/../../lib/locomotive.rb'
Locomotive.configure do |config|
# A single locomotive instance can serve one single site or many.
# If you want to run many different websites, you will have to specify
# your own domain name (ex: locomotivehosting.com).
#
# Ex:
# config.multi_sites do |multi_sites|
# # each new website you add will have a default entry based on a subdomain
# # and the multi_site_domain value (ex: website_1.locomotivehosting.com).
# multi_sites.domain = 'example.com' #'myhostingplatform.com'
#
# # define the reserved subdomains
# # Ex:
# multi_sites.reserved_subdomains = %w(www admin email blog webmail mail support help site sites)
# end
config.multi_sites = false
# configure the hosting target for the production environment. Locomotive can be installed in:
# - your own server
# - Heroku (you need to create an account in this case)
# - Bushi.do (see the bushi.do website for more explanations)
#
# the possible options are: server, heroku, bushido or auto (default)
# if you select 'auto', Locomotive will look after specific ENV variables to check
# the matching platform (Heroku and Bushido set their own ENV variables).
#
config.hosting = :auto
# In case you host Locomotive in Heroku, the engine uses the heroku api to add / remove domains.
# there are 2 ways of passing heroku credentials to Locomotive
# - from ENV variables: HEROKU_LOGIN & HEROKU_PASSWORD
# - from this file, see the example below and uncomment it if needed
config.heroku = {
:login => ENV['HEROKU_LOGIN'],
:password => ENV['HEROKU_PASSWORD']
}
# Locomotive uses the DelayedJob gem for the site import module.
# In case you want to deploy to Heroku, you will have to pay for an extra dyno.
# If you do not mind about importing theme without DelayedJob, disable it.
#
# Warning: this option is not used if you deploy on bushi.do and we set automatically the value to true.
config.delayed_job = false
# configure how many items we display in sub menu in the "Contents" section.
# config.lastest_items_nb = 5
# default locale (for now, only en, de, fr, pt-BR and it are supported)
config.default_locale = :en
# tell if logs are enabled. Useful for debug purpose.
config.enable_logs = true
# Configure the e-mail address which will be shown in the DeviseMailer, NotificationMailer, ...etc
# if you do not put the domain name in the email, Locomotive will take the default domain name depending
# on your deployment target (server, Heroku, Bushido, ...etc)
#
# Ex:
# config.mailer_sender = 'support'
# # => 'support@heroku.com' (Heroku), 'support@bushi.do' (Bushido), 'support@example.com' (Dev) or 'support@<your_hosting_platform>' (Multi-sites)
config.mailer_sender = 'support'
end unless Locomotive.engine? || Rails.env.test?
Jammit 警告不是您案例中的问题。如果在运行时关闭资产压缩，则此警告应熄灭。
我认为您的MongoDB连接参数存在一些问题。要么您尚未安装 MongoDB 加载项，要么连接参数不正确。
默认情况下，不会定义您在 locomotive.rb 中指定的 heroku 环境变量。直接指定用户名/密码或从 rails 文件夹内部指定用户名/密码，使用以下命令
heroku config:add HEROKU_LOGIN=<your_heroku_login>
heroku config:add HEROKU_PASSWORD=<your_heroku_password>
添加这些环境变量。
据我所知，您应该运行 ruby 1.8.7 或 1.9.2 以使机车工作。
您是否将红宝石更新为 thoe？
2011-05-23T12:03:01+00:00 app[web.1]: /app/.bundle/gems/ruby/1.8/gems/rest-client-1.6.1/lib/restclient/abstract_response.rb:48:in `return!': 401 Unauthorized (RestClient::Request::Unauthorized)
如果没有，让我们试试 Rvm ： https://rvm.io
并重新安装您的机车设置，然后它应该可以工作！
如果您需要更多详细信息，请查看有关铁路安装的第一个教程：http://ruby.railstutorial.org/