使用capistrano，passenger和apache部署rails

Question

I have recently set up a VPS and am trying to deploy a rails app. I watched a screencast: http://railscasts.com/episodes/335-deploying-to-a-vps which explained how to setup capistrano and unicorn with nginx, but also gave examples for apache.

I followed online guide for setting up passenger and adapted the railscasts capistrano recipe. When I run cap deploy:setup some directories are created on my server in the root of the application. Then when I run cap deploy the rails app is put into the releases folder and in a directory named by timestamp. So that part seems to work just fine.

So then for a while when i navigated to http://dev.gregchapple.com/site/index I got some passenger errors saying that certain gems were missing, so I installed them on the server using bundler then the errors went away. Thats when the current problem arose. Now when I go to http://dev.gregchapple.com/site/index all it says is: "We're sorry, but something went wrong."

The apache log contains this:

cache: [GET /site/index] miss
cache: [GET /] miss

Does anyone know what the problem is? My apache config file has been altered to set the document root to the public directory as specified by the passenger docs. I dont know what the problem is and its driving me insane!

Any help is greatly appreciated :)

UPDATE

This is what appears the production.log file:

Started GET "/site/index" for 109.255.221.170 at 2012-08-06 13:26:13 -0700

Mysql2::Error (Access denied for user 'root'@'localhost' (using password: NO)):
mysql2 (0.3.11) lib/mysql2/client.rb:44:in `connect'
mysql2 (0.3.11) lib/mysql2/client.rb:44:in `initialize'
activerecord (3.2.1) lib/active_record/connection_adapters/mysql2_adapter.rb:16:in `new'
activerecord (3.2.1) lib/active_record/connection_adapters/mysql2_adapter.rb:16:in `mysql2_connection'
activerecord (3.2.1) lib/active_record/connection_adapters/abstract/connection_pool.rb:277:in `new_connection'
activerecord (3.2.1) lib/active_record/connection_adapters/abstract/connection_pool.rb:287:in `checkout_new_connection'
activerecord (3.2.1) lib/active_record/connection_adapters/abstract/connection_pool.rb:235:in `block (2 levels) in checkout'
activerecord (3.2.1) lib/active_record/connection_adapters/abstract/connection_pool.rb:230:in `loop'
activerecord (3.2.1) lib/active_record/connection_adapters/abstract/connection_pool.rb:230:in `block in checkout' /home/greg/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/monitor.rb:211:in `mon_synchronize'
activerecord (3.2.1) lib/active_record/connection_adapters/abstract/connection_pool.rb:229:in `checkout'
activerecord (3.2.1) lib/active_record/connection_adapters/abstract/connection_pool.rb:95:in `connection'
activerecord (3.2.1) lib/active_record/connection_adapters/abstract/connection_pool.rb:374:in `retrieve_connection'
activerecord (3.2.1) lib/active_record/connection_adapters/abstract/connection_specification.rb:168:in `retrieve_connection'
activerecord (3.2.1) lib/active_record/connection_adapters/abstract/connection_specification.rb:142:in `connection'
activerecord (3.2.1) lib/active_record/query_cache.rb:67:in `rescue in call'
activerecord (3.2.1) lib/active_record/query_cache.rb:61:in `call'
activerecord (3.2.1) lib/active_record/connection_adapters/abstract/connection_pool.rb:443:in `call'
actionpack (3.2.1) lib/action_dispatch/middleware/callbacks.rb:28:in `block in call'
activesupport (3.2.1) lib/active_support/callbacks.rb:405:in `_run__3520547282522082875__call__1971459733125288916__callbacks'
activesupport (3.2.1) lib/active_support/callbacks.rb:405:in `__run_callback'
activesupport (3.2.1) lib/active_support/callbacks.rb:385:in `_run_call_callbacks'
activesupport (3.2.1) lib/active_support/callbacks.rb:81:in `run_callbacks'
actionpack (3.2.1) lib/action_dispatch/middleware/callbacks.rb:27:in `call'
actionpack (3.2.1) lib/action_dispatch/middleware/remote_ip.rb:31:in `call'
actionpack (3.2.1) lib/action_dispatch/middleware/debug_exceptions.rb:16:in `call'
actionpack (3.2.1) lib/action_dispatch/middleware/show_exceptions.rb:56:in `call'
railties (3.2.1) lib/rails/rack/logger.rb:26:in `call_app'
railties (3.2.1) lib/rails/rack/logger.rb:16:in `call'
actionpack (3.2.1) lib/action_dispatch/middleware/request_id.rb:22:in `call'
rack (1.4.1) lib/rack/methodoverride.rb:21:in `call'
rack (1.4.1) lib/rack/runtime.rb:17:in `call'
activesupport (3.2.1) lib/active_support/cache/strategy/local_cache.rb:72:in `call'
rack (1.4.1) lib/rack/lock.rb:15:in `call'
rack-cache (1.2) lib/rack/cache/context.rb:136:in `forward'
rack-cache (1.2) lib/rack/cache/context.rb:245:in `fetch'
rack-cache (1.2) lib/rack/cache/context.rb:185:in `lookup'
rack-cache (1.2) lib/rack/cache/context.rb:66:in `call!'
rack-cache (1.2) lib/rack/cache/context.rb:51:in `call'
railties (3.2.1) lib/rails/engine.rb:479:in `call'
railties (3.2.1) lib/rails/application.rb:220:in `call'
railties (3.2.1) lib/rails/railtie/configurable.rb:30:in `method_missing'
passenger (3.0.15) lib/phusion_passenger/rack/request_handler.rb:96:in `process_request'
passenger (3.0.15) lib/phusion_passenger/abstract_request_handler.rb:516:in `accept_and_process_next_request'
passenger (3.0.15) lib/phusion_passenger/abstract_request_handler.rb:274:in `main_loop'
passenger (3.0.15) lib/phusion_passenger/rack/application_spawner.rb:206:in `start_request_handler'
passenger (3.0.15) lib/phusion_passenger/rack/application_spawner.rb:171:in `block in handle_spawn_application'
passenger (3.0.15) lib/phusion_passenger/utils.rb:470:in `safe_fork'
passenger (3.0.15) lib/phusion_passenger/rack/application_spawner.rb:166:in `handle_spawn_application'
passenger (3.0.15) lib/phusion_passenger/abstract_server.rb:357:in `server_main_loop'
passenger (3.0.15) lib/phusion_passenger/abstract_server.rb:206:in `start_synchronously'
passenger (3.0.15) lib/phusion_passenger/abstract_server.rb:180:in `start'
passenger (3.0.15) lib/phusion_passenger/rack/application_spawner.rb:129:in `start'
passenger (3.0.15) lib/phusion_passenger/spawn_manager.rb:253:in `block (2 levels) in spawn_rack_application'
passenger (3.0.15) lib/phusion_passenger/abstract_server_collection.rb:132:in `lookup_or_add'
passenger (3.0.15) lib/phusion_passenger/spawn_manager.rb:246:in `block in spawn_rack_application'
passenger (3.0.15) lib/phusion_passenger/abstract_server_collection.rb:82:in `block in synchronize'
<internal:prelude>:10:in `synchronize'
passenger (3.0.15) lib/phusion_passenger/abstract_server_collection.rb:79:in `synchronize'
passenger (3.0.15) lib/phusion_passenger/spawn_manager.rb:244:in `spawn_rack_application'
passenger (3.0.15) lib/phusion_passenger/spawn_manager.rb:137:in `spawn_application'
passenger (3.0.15) lib/phusion_passenger/spawn_manager.rb:275:in `handle_spawn_application'
passenger (3.0.15) lib/phusion_passenger/abstract_server.rb:357:in `server_main_loop'
passenger (3.0.15) lib/phusion_passenger/abstract_server.rb:206:in `start_synchronously'
passenger (3.0.15) helper-scripts/passenger-spawn-server:99:in `<main>'

Update 2

database.yml

development:
  adapter: mysql2
  encoding: utf8
  reconnect: false
  database: gregchapple_development
  pool: 5
  host: localhost
  username: root
  password: *****
  socket: /tmp/mysql.sock

test:
  adapter: mysql2
  encoding: utf8
  reconnect: false
  database: gregchapple_test
  pool: 5
  host: localhost
  username: root
  password: *****
  socket: /tmp/mysql.sock

production:
  adapter: mysql2
  encoding: utf8
  reconnect: false
  database: gregchapple_production
  pool: 5
  host: localhost
  username: root
  password: *****
  socket: /tmp/mysql.sock

Answer 1

Your app is looking for the mysql2 adapter, so make sure in your Gemfile you have

gem 'mysql2'

and that you bundle install and that in your database.yml file you are using the mysql2 adapter.

production:
  adapter: mysql2
  ...

And don't forget to restart Passenger - touch tmp/restart.txt from the root of the Rails app.

Congrats! You're almost there!

Answer 2

I had similar problem like you. I changed these rows in database.yml add

host: 127.0.0.1

remove

socket: /tmp/mysql.sock

Then:

cap deploy:setup
cap deploy:check
cap deploy:cold
#some updates with custom code
cap deploy:update

You must update everything in code with capistrano, DON'T CHANGE CODE ON VPN (you can create only tmp dir). You check your sql connection manualy with ssh on vpn. For example

mysql -u gregchapple -p

Your virtual host is ok?

Answer 3

Your Rails app's database.yml 's production section is not configured properly.

1. Configure mysql database on your server.
2. Configure production section in database.yml in your rails app and provide db username and password for production server.
3. Deploy again.
4. Test.