改变Rails.root路径

Question

Rails 3.2

ruby 1.9.3

这就是我的版本存储在服务器上的地方。

deploy@production-web:/var/www/mrd_production/releases$ ls
20150729224354  20150730101637  20150730110152  20150730122336

这就是我当前产品存储在服务器中的地方。

deploy@production-web:/var/www/mrd_production/current$ ls
app                     config.ru  Gemfile       public    spec
assets_manifest_backup  db         Gemfile.lock  Rakefile  tmp
bin                     doc        Guardfile     README    Vagrantfile
Capfile                 features   lib           REVISION
config                  fixtures   log           script

因此，我使用capistrano进行部署：

bundle exec cap production deploy

deploy.rb

lock '3.4.0'

set :application, 's2yd'

set :repo_url, 'git@bitbucket.org:mrdelivery/mxad-mr.-delivery.git'

set :keep_releases, 3
set :log_level, :info
set :linked_files, %w{.env}
set :linked_dirs, %w{public/system}
set :migration_role, :app
set :rbenv_type, :user
set :rbenv_ruby, '1.9.3-p484'

namespace :deploy do
  desc 'Restart application'
  task :restart do
    on roles(:app), in: :sequence, wait: 3 do
      execute :touch, release_path.join('tmp/restart.txt')
    end
  end

  after :publishing, :restart
end

    namespace :rails do
      desc 'Open the rails console on the primary remote server'
      task :console do
        on roles(:app), primary: true do |host|
          command = "cd #{deploy_to}/current && /home/#{host.user}/.rbenv/shims/bundle exec rails console #{fetch(:stage)}"
          exec "ssh -l #{host.user} #{host.hostname} -p #{host.port || 22} -t 'cd #{deploy_to}/current && #{command}'"
        end
      end
    end

config/deploy/production.rb

set :deploy_to, '/var/www/mrd_production' # Change this to match your deploy_dir in vars/app.yml

server '104.130.31.250', user: 'deploy', roles: %w{web app}

namespace :deploy do
  desc 'generate_ymls'
  task :generate_ymls do
    on roles(:app) do
      upload! File.expand_path('../../database.yml.production',  __FILE__), "#{release_path}/config/database.yml"
    end
  end
end
before "deploy:migrate", 'deploy:generate_ymls'

部署后，我输入应用程序所在的文件夹/var/www/mrd_production/current .

deploy@production-web:/var/www/mrd_production/current$ RAILS_ENV=production rails c

irb(main):001:0> Rails.root
=> #<Pathname:/var/www/mrd_production/releases/20150730122336>
irb(main):002:0> 

问题是Rails.root指向/var/www/mrd_production/releases/20150730122336，但我需要将它指向在/var/www/mrd_production/current中的文件夹

如何更改Rails.root？

编辑

包exec帽生产部署日志：

INFO [8ba777a3] Running /usr/bin/env mkdir -p /tmp/s2yd/ as deploy@<server-ip>
INFO [8ba777a3] Finished in 0.269 seconds with exit status 0 (successful).
INFO Uploading /tmp/s2yd/git-ssh.sh 100.0%
INFO [867961a0] Running /usr/bin/env chmod +x /tmp/s2yd/git-ssh.sh as deploy@<server-ip>
INFO [867961a0] Finished in 0.267 seconds with exit status 0 (successful).
INFO [6be86a24] Running /usr/bin/env git ls-remote --heads git@bitbucket.org:mrdelivery/mxad-mr.-delivery.git as deploy@<server-ip>
INFO [6be86a24] Finished in 0.900 seconds with exit status 0 (successful).
INFO [e6f437c4] Running /usr/bin/env mkdir -p /var/www/mrd_production/shared /var/www/mrd_production/releases as deploy@<server-ip>
INFO [e6f437c4] Finished in 0.334 seconds with exit status 0 (successful).
INFO [37165e60] Running /usr/bin/env mkdir -p /var/www/mrd_production/shared/public/system as deploy@<server-ip>
INFO [37165e60] Finished in 0.266 seconds with exit status 0 (successful).
INFO [3c9b9d10] Running /usr/bin/env mkdir -p /var/www/mrd_production/shared as deploy@<server-ip>
INFO [3c9b9d10] Finished in 0.265 seconds with exit status 0 (successful).
INFO The repository mirror is at /var/www/mrd_production/repo
INFO [0002d83c] Running /usr/bin/env git remote update as deploy@<server-ip>
INFO [0002d83c] Finished in 2.495 seconds with exit status 0 (successful).
INFO [869b66a7] Running /usr/bin/env mkdir -p /var/www/mrd_production/releases/20150730220743 as deploy@<server-ip>
INFO [869b66a7] Finished in 0.271 seconds with exit status 0 (successful).
INFO [1b9871ea] Running /usr/bin/env git archive master | tar -x -f - -C /var/www/mrd_production/releases/20150730220743 as deploy@<server-ip>
INFO [1b9871ea] Finished in 0.528 seconds with exit status 0 (successful).
INFO [c28030f4] Running /usr/bin/env echo "6ce11b0" >> REVISION as deploy@<server-ip>
INFO [c28030f4] Finished in 0.266 seconds with exit status 0 (successful).
INFO [0af78fb4] Running /usr/bin/env mkdir -p /var/www/mrd_production/releases/20150730220743 as deploy@<server-ip>
INFO [0af78fb4] Finished in 0.273 seconds with exit status 0 (successful).
INFO [86aef2af] Running /usr/bin/env ln -s /var/www/mrd_production/shared/.env /var/www/mrd_production/releases/20150730220743/.env as deploy@<server-ip>
INFO [86aef2af] Finished in 0.267 seconds with exit status 0 (successful).
INFO [80cc46a1] Running /usr/bin/env mkdir -p /var/www/mrd_production/releases/20150730220743/public as deploy@<server-ip>
INFO [80cc46a1] Finished in 0.268 seconds with exit status 0 (successful).
INFO [bbfef99c] Running /usr/bin/env rm -rf /var/www/mrd_production/releases/20150730220743/public/system as deploy@<server-ip>
INFO [bbfef99c] Finished in 0.270 seconds with exit status 0 (successful).
INFO [66f90632] Running /usr/bin/env ln -s /var/www/mrd_production/shared/public/system /var/www/mrd_production/releases/20150730220743/public/system as deploy@<server-ip>
INFO [66f90632] Finished in 0.268 seconds with exit status 0 (successful).
INFO [e63b7bd2] Running ~/.rbenv/bin/rbenv exec bundle install --path /var/www/mrd_production/shared/bundle --without development test --deployment --quiet as deploy@<server-ip>
INFO [e63b7bd2] Finished in 0.701 seconds with exit status 0 (successful).
INFO [89bd1320] Running ~/.rbenv/bin/rbenv exec bundle exec rake assets:precompile as deploy@<server-ip>
INFO [89bd1320] Finished in 15.517 seconds with exit status 0 (successful).
INFO [8e1765be] Running /usr/bin/env mkdir -p /var/www/mrd_production/releases/20150730220743/assets_manifest_backup as deploy@<server-ip>
INFO [8e1765be] Finished in 0.266 seconds with exit status 0 (successful).
INFO [30408583] Running /usr/bin/env cp /var/www/mrd_production/releases/20150730220743/public/assets/manifest.yml /var/www/mrd_production/releases/20150730220743/assets_manifest_backup as deploy@<server-ip>
INFO [30408583] Finished in 0.270 seconds with exit status 0 (successful).
INFO Uploading /home/drobazko/www/mxad-mr.-delivery/config/database.yml.production 100.0%
INFO [deploy:migrate] Run `rake db:migrate`
INFO [e0eabe3f] Running ~/.rbenv/bin/rbenv exec bundle exec rake db:migrate as deploy@<server-ip>
INFO [e0eabe3f] Finished in 14.161 seconds with exit status 0 (successful).
INFO [36cbdf44] Running /usr/bin/env ln -s /var/www/mrd_production/releases/20150730220743 /var/www/mrd_production/releases/current as deploy@<server-ip>
INFO [36cbdf44] Finished in 0.270 seconds with exit status 0 (successful).
INFO [f261e897] Running /usr/bin/env mv /var/www/mrd_production/releases/current /var/www/mrd_production as deploy@<server-ip>
INFO [f261e897] Finished in 0.266 seconds with exit status 0 (successful).
INFO [47336a26] Running /usr/bin/env touch /var/www/mrd_production/releases/20150730220743/tmp/restart.txt as deploy@<server-ip>
INFO [47336a26] Finished in 0.267 seconds with exit status 0 (successful).
INFO Keeping 3 of 4 deployed releases on <server-ip>
INFO [81cb4cbd] Running /usr/bin/env rm -rf /var/www/mrd_production/releases/20150730162232 as deploy@<server-ip>
INFO [81cb4cbd] Finished in 0.384 seconds with exit status 0 (successful).
INFO [673ac3d6] Running /usr/bin/env echo "Branch master (at 6ce11b0) deployed as release 20150730220743 by drobazko" >> /var/www/mrd_production/revisions.log as deploy@<server-ip>

Answer 1

如果我没有弄错的话，当Capistrano制作current文件夹时，它实际上是最新版本(可能是符号链接目录更好)的“快捷方式”(因为缺少更好的术语)。

我不知道有一个链接到他们的文档，它描述了我在说什么，但我相当肯定，您应该对您想要运行的任何东西都没有意见。

编辑：

此页描述了capistrano目录层次结构。如果您专门查看current上的部分，它会读到：

current是指向最新版本的符号链接。此符号链接在成功部署结束时更新。如果部署在任何步骤中失败，当前符号链接仍然指向旧版本。 版本将所有部署保存在一个时间戳文件夹中。这些文件夹是当前符号链接的目标。

Answer 2

看来在部署之后，您仍然处于“旧”当前符号链接中。cd出当前，然后返回，然后跳回Rails控制台，您应该在新的正确的发布路径中。

这一行显示当前与最新发布目录的符号链接是正确的。

INFO [36cbdf44] Running /usr/bin/env ln -s /var/www/mrd_production/releases/20150730220743 /var/www/mrd_production/releases/current as deploy@<server-ip>

当部署发生时，您不能停留在当前状态，否则，符号链接就会从您的下面改变，shell也不知道。

其他值得注意的事项：

要像在deploy.rb中一样打开一个shell，只需使用https://github.com/marshall-lee/capistrano-shell。

另外，不要通过字符串连接创建shell命令，例如，使用DSL。

task :do_something do
  on roles(:web) do
    within release_path do
      with rails_env: fetch(:rails_env) do
        execute :rake, 'simple:task'
      end
    end
  end
end