我在使用 Capistrano 将每当 gem 部署到我的生产环境时遇到问题。
问题源于一个bundle exec whenever命令触发了一些“缺少 gem”问题（但从 shell 运行捆绑安装显示一切实际上都在那里！）。
我的感觉是发生了两件事之一：Bundler 之前没有完全加载bundle exec正在被调用，或者不知何故存在路径问题，导致它在错误的位置运行。
这是发生的事情：
* executing `deploy'
* executing `deploy:update'
** transaction: start
* executing `deploy:update_code'
executing locally: "git ls-remote git@my-source-repository:mysource.git HEAD"
command finished in 1847ms
* executing "git clone -q git@my-source-repository:mysource.git /domains/myapp/releases/20130124211036 && cd /domains/myapp/releases/20130124211036 && git checkout -q -b deploy 90238bbcb993e3e7df2374ffaa13e7ed701c202e && (echo 90238bbcb993e3e7df2374ffaa13e7ed701c202e > /domains/myapp/releases/20130124211036/REVISION)"
servers: ["myip"]
[myip] executing command
** [myip :: out] Enter passphrase for key '/home/deploy/.ssh/id_rsa':
** [myip :: out]
command finished in 9294ms
* executing `deploy:finalize_update'
triggering before callbacks for `deploy:finalize_update'
* executing `whenever:update_crontab'
* executing "cd /domains/myapp/releases/20130124211036 && bundle exec whenever --update-crontab My App --set environment=production --roles db"
servers: ["myip"]
[myip] executing command
** [out :: myip] Could not find carrierwave-0.5.8 in any of the sources
** [out :: myip] Run `bundle install` to install missing gems.
command finished in 1967ms
*** [deploy:update_code] rolling back
* executing "rm -rf /domains/myapp/releases/20130124211036; true"
servers: ["myip"]
[myip] executing command
command finished in 998ms
failed: "rvm_path=/usr/local/rvm /usr/local/rvm/bin/rvm-shell '1.9.3' -c 'cd /domains/myapp/releases/20130124211036 && bundle exec whenever --update-crontab My App --set environment=production --roles db'" on myip
您可以看到失败来自这一行：
bundle exec whenever --update-crontab
它又由我的 Capistrano deploy.rb 运行。
# Your Application's "Name"
set :application, [My App]
# The URL to your application's repository
set :repository, [repo]
set :scm, :git
set :scm_passphrase, [password]
# The user you are using to deploy with (This user should have SSH access to your server)
set :user, "deploy"
# We want to deploy everything under your user, and we don't want to use sudo
set :use_sudo, false
# Where to deploy your application to.
set :deploy_to, "/domains/myapp/"
# Load RVM's capistrano plugin.
require "rvm/capistrano"
set :rvm_ruby_string, '1.9.3'
set :rvm_type, :system # use system-wide RVM
# Require that we use bundler to install necessary gem dependencies
require "bundler/capistrano"
set :whenever_command, "bundle exec whenever"
require "whenever/capistrano"
# -------------------------------- Server Definitions --------------------------------
# Define the hostname of your server. If you have multiple servers for multiple purposes, we can define those below as well.
set :server_name, [server]
# We're assuming you're using a single server for your site, but if you have a seperate asset server or database server, you can specify that here.
role :app, server_name
role :web, server_name
role :db, server_name, :primary => true
# -------------------------------- Final Config --------------------------------
# This configuration option is helpful when using svn+ssh but doesn't hurt anything to leave it enabled always.
default_run_options[:pty] = true
namespace :deploy do
desc "Tell Passenger to restart the app."
task :restart do
run "touch #{deploy_to}current/tmp/restart.txt"
end
task :start do
run "cd #{deploy_to} && ln -s current/public public_html"
run "touch #{deploy_to}current/tmp/restart.txt"
end
task :symlink do
run "cd #{deploy_to} && rm current ; ln -s releases/#{release_name} current"
end
task :stop do
run "rm #{deploy_to}public_html"
end
namespace :web do
task :disable do
run "cd #{deploy_to} && rm public_html && ln -s static_site public_html"
end
task :enable do
run "cd #{deploy_to} && rm public_html && ln -s current/public public_html"
end
end
desc "Symlink shared configs and folders on each release."
task :symlink_shared do
run "ln -nfs #{shared_path}/config/database.yml #{release_path}/config/database.yml"
run "ln -nfs #{shared_path}/assets #{release_path}/public/assets"
# create symlink to uploads folder for Carrierwave resources (i.e., book cover images)
run "ln -nfs #{shared_path}/uploads #{release_path}/public/uploads"
end
desc "Sync the public/assets directory."
task :assets do
system "rsync -vr --exclude='.DS_Store' public/assets #{user}@#{application}:#{shared_path}/"
end
end
after "deploy", "deploy:migrate"
after 'deploy:update_code', 'deploy:symlink_shared'
after(:setup) do
run "rm -rf #{deploy_to}public_html"
run "mkdir #{deploy_to}static_site"
end
现在，我收到的有关 CarrierWave 的错误是伪造的 - 我已经使用 CarrierWave 很长时间了 - 而且这个问题显然源于（正如您可以通过触发错误的命令看到的）来自每当本身或 Bundler。
我认为这实际上可能与 RVM 相关的路径有关。无论如何，bundle exec whenever不工作。
有任何想法吗？
