Capistrano - can't deploy my database.yml - ruby

Question

When I try to deploy my app with capistrano, I'll get this error:
failed: "sh -c 'cp
/var/www/my_app/releases/20120313115055/config/database.staging.yml
/var/www/my_app/releases/20120313115055/config/database.yml'" on
IP_ADDR
My database.yml ie empty, database.staging.yml:
production:
adapter: mysql2
encoding: utf8
reconnect: false
database: my_db
pool: 15
username: my_user_name
password: my_pass
host: localhost
in the /confing/deploy are files "production" "staging"
What am I missing here/where should I look for a failure? The credentials to database on the server should be right.
EDIT - here is my deploy
set :application, "my_app"
set :repository, "https://IP_ADDR/svn/my_app"
set :scm, :subversion
set :scm_username, 'my_name'
set :scm_password, 'my_pass'
default_run_options[:pty] = true
set :user, "my_name"
set :domain, 'IP_ADDR'
set :deploy_to, "/var/www/my_app"
set :use_sudo, false
set :deploy_via, :remote_cache
#set :keep_releases, 1
set :rails_env, 'production'
role :web, domain
role :app, domain
role :db, domain, :primary => true # This is where Rails migrations will run
namespace :deploy do
task :build_gems, :roles => :app do
desc "Building gems"
run "cd #{release_path} && bundle install --deployment"
end
task :migrations do
desc "Migrating database"
run "cd #{release_path} && rake db:migrate RAILS_ENV=production"
end
[:start, :stop].each do |t|
desc "#{t} task is a no-op with passenger"
task t, :roles => :app do ; end
end
desc "Restarting passenger with restart.txt"
task :restart, :roles => :app, :except => { :no_release => true } do
run "touch #{release_path}/tmp/restart.txt"
end
after "deploy:update_code", "deploy:build_gems", "db:copy_configuration", "config:copy", "deploy:migrations", "deploy:cleanup"
after "deploy:update", "bluepill:copy_config", "bluepill:restart"
end
namespace :db do
task :copy_configuration do
run "cp #{release_path}/config/database.staging.yml #{release_path}/config/database.yml"
end
end
namespace :config do
task :copy do
run "cp #{release_path}/config/config.staging.yml #{release_path}/config/config.yml"
end
end
namespace :bluepill do
desc "Restart bluepill process"
task :restart, :roles => [:app] do
run "#{release_path}/script/delayed_job stop"
sudo "/etc/init.d/bluepill.sh restart"
end
#desc "Load bluepill configuration and start it"
##task :start, :roles => [:app] do
# sudo "/etc/init.d/bluepill.sh start"
#end
desc "Prints bluepills monitored processes statuses"
task :status, :roles => [:app] do
sudo "bluepill status"
end
desc "Copy config"
task :copy_config, :roles => [:app] do
run "cp #{release_path}/config/bluepill/configuration.rb /srv/script/bluepill.rb"
end
end
The problem:
cp: cannot stat `/var/www/my_app/releases/20120313144907/config/database.staging.yml': No such file or directory

Answer 1

I'm not sure how to solve your problem. It looks like database.staging.yml is not being deployed, so there's nothing for it to copy over.
I think there's a better workflow, though. Things like settings and database configs do not typically change between deployments, so those things can go in the shared folder of all the capistrano releases. Typically, you don't want your database.yml to be in your repo either since it's sensitive information. You can satisfy both of these things by excluding config/database.yml in your .gitignore.
This requires you to do a one time set up on your servers. You need create a database.yml at your_app_path/shared/config. Shared is a sibling to current and releases.
Your deploy.rb should have a task that symlinks the newly deployed release's database.yml to the on in the shared directory. Like this:
before "deploy:assets:precompile" do
run ["ln -nfs #{shared_path}/config/settings.yml #{release_path}/config/settings.yml",
"ln -nfs #{shared_path}/config/database.yml #{release_path}/config/database.yml",
"ln -fs #{shared_path}/uploads #{release_path}/uploads"
].join(" && ")
end
This means that your repo will contain no database.yml files. Since they are probably already in your repo. You'll have to git rm them, commit. Add them to the .gitignore and commit that.

Answer 2

In Capistrano 3, linking files is built-in. John's answer is simply:
In the shared/ folder create config/database.yml
In config/deploy.rb use this line
set :linked_files, fetch(:linked_files, []).push('config/database.yml')
This does what John was saying.

Answer 3

If you don't need to "reference application objects or methods"(1) during precompile then you might be OK with setting config.assets.initialize_on_precompile to false in config/application.rb