Ruby-on-rails 如何手动重启独角兽
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how to restart unicorn manually
提问by BrainLikeADullPencil
I'm not confident that unicorn is restarting properly when I run cap deployas certain changes are not showing in the app, therefore I wanted to restart unicorn manually on my remote server. I have navigated into etc/init.dand see a listing for unicorn_myappbut it's not a directory (i.e. I can't cd into it). Based on the code below from my deploy.rb file, is there something I can do from here to restart unicorn?
我不确定当我运行时 unicorn 是否正确重新启动cap deploy，因为应用程序中没有显示某些更改，因此我想在我的远程服务器上手动重新启动 unicorn。我已经导航etc/init.d并看到了一个列表，unicorn_myapp但它不是一个目录（即我不能进入它）。根据我的 deploy.rb 文件中的以下代码，我可以从这里做些什么来重新启动独角兽？
I tried to do run unicorn_myapp restartbut it said runisn't a command
我试图做，run unicorn_myapp restart但它说run不是命令
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
回答by Doon
you didn't list the OS. but one of the following should work.
你没有列出操作系统。但以下之一应该有效。
you will need to be root / use sudo
您将需要成为 root / 使用 sudo
/etc/init.d/unicorn_myapp restart
/etc/init.d/unicorn_myapp stop
/etc/init.d/unicorn_myapp start
service unicorn_myapp restart
service unicorn_myapp stop
service unicorn_myapp start
Try the restart versions first, but depending upon how the init script was written it might not have a restart command, if that doesn't work you can do the stop / start version.
首先尝试重新启动版本，但根据 init 脚本的编写方式，它可能没有重新启动命令，如果这不起作用，您可以执行停止/启动版本。
回答by Vincent Guerci
Alternatively, instead of relying on /etc/init.d...scripts which are OS dependent, a simple way to restart unicorn is to send HUP (1)signal to its master process.
或者，不是依赖依赖于/etc/init.d...操作系统的脚本，重启 unicorn 的一种简单方法是HUP (1)向其主进程发送信号。
Here is for instance how I reload an app automatically after a git pushvia post-receivehook:
例如，以下是我如何在git pushviapost-receive挂钩后自动重新加载应用程序：
#!/bin/sh
unicorn_pid=`cat /tmp/pids/unicorn.pid`
echo "Restarting Unicorn ($unicorn_pid)"
kill -HUP $unicorn_pid
In your case, /etc/init.d/unicorn_myapp restartscript is probably doing this. Check the unicorn.conf for the location of its pidfile.
在您的情况下，/etc/init.d/unicorn_myapp restart脚本可能正在执行此操作。检查 unicorn.conf 以获取其 pidfile 的位置。
For more details, see unicorn SIGNALS documentations
有关更多详细信息，请参阅unicorn SIGNALS 文档
回答by wwwslinger
You might have to be root, but it should just be /etc/init.d/unicorn_myapp restart(don't include run, which is not a shell command).
您可能必须是 root，但它应该只是/etc/init.d/unicorn_myapp restart（不要包含run，这不是 shell 命令）。
