我想使用capistrano 3 在我的vps上部署我的网络应用程序。不幸的是，我收到了一些错误：
<!DOCTYPE html>
<html>
<head>
<style>
.one {
color: red;
}
.one li {
color: blue;
}
.one .two {
color: pink;
}
.one .two .three {
color: purple;
}
.two {
color: green;
}
.one.two {
color: yellow;
}
.two.three {
color: grey;
}
</style>
</head>
<body>
<div class="one">
<ul class="two">
<li>Item One</li>
</ul>
</div>
<div class="three two one">
<p>TEST</p>
</div>
</body>
</html>据我所知，这些失败的测试都没问题，因为它只检查符号链接和目录的存在。但以下是游戏破坏者：
DEBUG [6de1d411] Running [ -L /var/www/myapp/releases/20160405125654/log ] as user@example.com
DEBUG [6de1d411] Command: [ -L /var/www/myapp/releases/20160405125654/log ]
DEBUG [6de1d411] Finished in 0.005 seconds with exit status 0 (successful).
DEBUG [cf28b01d] Running [ -L /var/www/myapp/releases/20160405125654/tmp/pids ] as user@example.com
DEBUG [cf28b01d] Command: [ -L /var/www/myapp/releases/20160405125654/tmp/pids ]
DEBUG [cf28b01d] Finished in 0.005 seconds with exit status 1 (failed).
DEBUG [c7f0b156] Running [ -d /var/www/myapp/releases/20160405125654/tmp/pids ] as user@example.com
DEBUG [c7f0b156] Command: [ -d /var/www/myapp/releases/20160405125654/tmp/pids ]
DEBUG [c7f0b156] Finished in 0.005 seconds with exit status 1 (failed).
显然，Debian jessie依赖INFO [c1b0c10e] Finished in 0.007 seconds with exit status 0 (successful).
INFO [e895fd13] Running /usr/bin/env sudo /etc/init.d/nginx reload as user@example.com
DEBUG [e895fd13] Command: ( export RBENV_ROOT="$HOME/.rbenv" RBENV_VERSION="2.2.3" ; /usr/bin/env sudo /etc/init.d/nginx reload )
DEBUG [e895fd13] Reloading nginx configuration (via systemctl): nginx.service
DEBUG [e895fd13] .
INFO [e895fd13] Finished in 0.037 seconds with exit status 0 (successful).
INFO [1a822f12] Running /usr/bin/env service unicorn_myapp_production restart as user@example.com
DEBUG [1a822f12] Command: ( export RBENV_ROOT="$HOME/.rbenv" RBENV_VERSION="2.2.3" ; /usr/bin/env service unicorn_myapp_production restart )
DEBUG [1a822f12] /usr/bin/env: service
DEBUG [1a822f12] : No such file or directory
(Backtrace restricted to imported tasks)
cap aborted!
SSHKit::Runner::ExecuteError: Exception while executing as user@example.com: service exit status: 127
service stdout: Nothing written
service stderr: /usr/bin/env: service: No such file or directory
代替systemctl，因为
service确实不存在。不，我想通过添加
来覆盖默认行为/usr/bin/env service
到namespace :unicorn do
task :defaults do
on roles :app do
set :unicorn_user, fetch(:unicorn_user, deploy_user)
end
end
desc 'Setup Unicorn initializer'
task :setup_initializer do
on roles :app do
next if file_exists? unicorn_initd_file
sudo_upload! template('unicorn_init.erb'), unicorn_initd_file
execute :chmod, '+x', unicorn_initd_file
sudo 'update-rc.d', '-f', fetch(:unicorn_service), 'defaults'
end
end
desc 'Setup Unicorn app configuration'
task :setup_app_config do
on roles :app do
next if file_exists? fetch(:unicorn_config)
execute :mkdir, '-pv', File.dirname(fetch(:unicorn_config))
upload! template('unicorn.rb.erb'), fetch(:unicorn_config)
end
end
%w[start stop restart].each do |command|
desc "#{command} unicorn"
task command do
on roles :app do
# execute :service, fetch(:unicorn_service), command
# run "#{sudo} systemctl #{command} unicorn_#{application}"
sudo "/etc/init.d/unicorn_#{fetch(:unicorn_service)} #{command}"
end
end
end
before :setup_initializer, :defaults
end
。但是卡皮斯特拉诺忽略了这个设置。那么如何确保加载特定于Debian-8的配置。
答案 0 :(得分：0)
我不熟悉独角兽，但我认为你正在使用定义上限任务的东西，然后你试图覆盖？如果是这种情况，使用Capistrano 3，您需要在重新定义之前清除原始任务。您目前正在做的事情扩展了任务。您需要使用Rake::Task["task_name"].clear这样的内容：
namespace :unicorn do
%w[start stop restart].each do |command|
Rake::Task["unicorn:#{command}"].clear
desc "#{command} unicorn"
task command do
on roles :app do
# execute :service, fetch(:unicorn_service), command
# run "#{sudo} systemctl #{command} unicorn_#{application}"
sudo "/etc/init.d/unicorn_#{fetch(:unicorn_service)} #{command}"
end
end
end
end