Rails production - all pictures are broken after new deploy - nginx

Question

I followed the Ryan's screencast and deployed to VPS. So i use Unicorn + nginx + github + Ubuntu 12.04 LTS + capistrano. Also i use i18n to translate application.
I also would like to notice that i use Carriarewave for picture uploading. Carriarewave keeps pictures on VPS locally. When i upload images it works great and uploaded pictures appear.
But each time when i deploy new changes to the server then ALL my pictures become broken. It's really awfull. I tried manually to restart nginx:
sudo service nginx restart
And i tried to restart Unicorn:
/etc/init.d/unicorn_Chirch_app restart
It doesn't help too.
When i try to open my broken page manually it says:
The page you were looking for doesn't exist.
You may have mistyped the address or the page may have moved.
When i try to find pictures in console:
> Photo.all
> => [#<Photo id: 3, description: nil, created_at: "2013-01-21 11:14:01", updated_at: "2013-01-21 11:14:01", image: "1320700703588.jpg">, #<Photo id: 4, description: nil, created_at: "2013-01-21 11:14:01", updated_at: "2013-01-21 11:14:01", image: "Seasonscape_by_alexiuss.jpg">, #<Photo id: 5, description: nil, created_at: "2013-01-21 11:30:30", updated_at: "2013-01-21 11:30:30", image: "Seasonscape_by_alexiuss.jpg">]
As i understand they should exist.
Error from logs:
Started GET "/ru/uploads%2Fphoto%2Fimage%2F4%2FSeasonscape_by_alexiuss" for 89.178.205.47 at 2013-01-21 11:31:17 +0000
ActionController::RoutingError (No route matches [GET] "/ru/uploads%2Fphoto%2Fimage%2F4%2FSeasonscape_by_alexiuss"):
actionpack (3.2.8) lib/action_dispatch/middleware/debug_exceptions.rb:21:in `call'
actionpack (3.2.8) lib/action_dispatch/middleware/show_exceptions.rb:56:in `call'
railties (3.2.8) lib/rails/rack/logger.rb:26:in `call_app'
railties (3.2.8) lib/rails/rack/logger.rb:16:in `call'
actionpack (3.2.8) lib/action_dispatch/middleware/request_id.rb:22:in `call'
rack (1.4.4) lib/rack/methodoverride.rb:21:in `call'
rack (1.4.4) lib/rack/runtime.rb:17:in `call'
activesupport (3.2.8) lib/active_support/cache/strategy/local_cache.rb:72:in `call'
rack (1.4.4) 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 (3.2.8) lib/rails/engine.rb:479:in `call'
railties (3.2.8) lib/rails/application.rb:223:in `call'
railties (3.2.8) lib/rails/railtie/configurable.rb:30:in `method_missing'
unicorn (4.5.0) lib/unicorn/http_server.rb:552:in `process_client'
unicorn (4.5.0) lib/unicorn/http_server.rb:628:in `worker_loop'
unicorn (4.5.0) lib/unicorn/http_server.rb:500:in `spawn_missing_workers'
unicorn (4.5.0) lib/unicorn/http_server.rb:511:in `maintain_worker_count'
unicorn (4.5.0) lib/unicorn/http_server.rb:277:in `join'
unicorn (4.5.0) bin/unicorn:121:in `<top (required)>'
/home/deployer/apps/My_app/shared/bundle/ruby/1.9.1/bin/unicorn:23:in `load'
/home/deployer/apps/My_app/shared/bundle/ruby/1.9.1/bin/unicorn:23:in `<main>'
My config/deploy.rb
require "bundler/capistrano"
server "my_ip_here", :web, :app, :db, primary: true
set :application, "My_app"
set :user, "deployer"
set :deploy_to, "/home/#{user}/apps/#{application}"
set :deploy_via, :remote_cache
set :use_sudo, false
set :scm, "git"
set :repository, "git#github.com:MyName/#{application}.git"
set :branch, "master"
default_run_options[:pty] = true
ssh_options[:forward_agent] = true
after "deploy", "deploy:cleanup" # keep only the last 5 releases
namespace :deploy do
%w[start stop restart].each do |command|
desc "#{command} unicorn server"
task command, roles: :app, except: {no_release: true} do
run "/etc/init.d/unicorn_#{application} #{command}"
end
end
task :setup_config, roles: :app do
sudo "ln -nfs #{current_path}/config/nginx.conf /etc/nginx/sites-enabled/#{application}"
sudo "ln -nfs #{current_path}/config/unicorn_init.sh /etc/init.d/unicorn_#{application}"
run "mkdir -p #{shared_path}/config"
put File.read("config/database.example.yml"), "#{shared_path}/config/database.yml"
puts "Now edit the config files in #{shared_path}."
end
after "deploy:setup", "deploy:setup_config"
task :symlink_config, roles: :app do
run "ln -nfs #{shared_path}/config/database.yml #{release_path}/config/database.yml"
end
after "deploy:finalize_update", "deploy:symlink_config"
desc "Make sure local git is in sync with remote."
task :check_revision, roles: :web do
unless `git rev-parse HEAD` == `git rev-parse origin/master`
puts "WARNING: HEAD is not the same as origin/master"
puts "Run `git push` to sync changes."
exit
end
end
before "deploy", "deploy:check_revision"
end

Answer 1

Ok, I found the solution. The problem appeared because I didn't change the default folder to keep images. You can find your default folder in public/uploads. That means that each cap deploy will create a new empty folder which doesn't contain your older files.
To fix this you should create another folder which doesn't live in your application. I choose the easiest way. I created symlinlk.
My steps:
1) On your server go to your app's shared folder (it generated automatically via capistrano). And then create your folder to keep new images:
$ mkdir uploads
2) Give necessary rights for a created folder:
$ sudo chmod 775 uploads
3) On your local machine in config/deploy.rb add:
task :symlink_config, roles: :app do
...
run "ln -nfs #{shared_path}/uploads #{release_path}/public/uploads"
end
4) Then push git and deploy:
$ git push
$ cap deploy:symlink
$ cap deploy
Now everything works fine.

Answer 2

Good one! I've extended your capistrano recipe.
# config/recipes/carrierwave.rb
namespace :carrierwave do
task :uploads_folder do
run "mkdir -p #{shared_path}/uploads"
run "#{sudo} chmod 775 #{shared_path}/uploads"
end
after 'deploy:setup', 'carrierwave:uploads_folder'
task :symlink do
run "ln -nfs #{shared_path}/uploads #{release_path}/public/uploads"
end
after 'deploy', 'carrierwave:symlink'
end

Answer 3

#ExiRe & #Charlie answer works on Capistrano 2.x. In Capistrano 3.x, command run replaced with command execute.
So, I solved this with the following steps:
Create a rake file in the directory lib/capistrano/tasks/carrierwave.rake with the content:
namespace :carrierwave do
task :uploads_folder do
on roles(:app) do
execute "mkdir -p #{shared_path}/uploads"
execute "#{sudo} chmod 775 #{shared_path}/uploads"
end
end
task :symlink do
on roles(:app) do
execute "ln -nfs #{shared_path}/uploads #{release_path}/public/uploads"
end
end
end
Add the following line at the end of your Capfile if it's doesn't have it.
Dir.glob('lib/capistrano/tasks/*.rake').each { |r| import r }
Add these tasks in config/deploy.rb with other tasks.
after 'deploy:publishing', 'carrierwave:uploads_folder'
after 'deploy:publishing', 'carrierwave:symlink'
namespace :deploy do
..
after 'deploy:publishing', 'carrierwave:uploads_folder'
after 'deploy:publishing', 'carrierwave:symlink'
..
end
Push git and deploy
Now your uploaded image will remain saved in shared/uploads folder after even new deploy.