如何让使用 Puma 和 Capistrano 部署的 Rails 应用程序在重新启动时启动

Question

我已经成功使用 Capistrano 部署了 Rails 4、Puma、Nginx 应用程序。当我部署时cap production deploy一切都很好。我的问题是，如果服务器由于某种原因重新启动或者崩溃，它不会重新启动。

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我在 DigitalOcean 上使用 Debian 8。Debian 8 似乎使用了，所以我按照Pumasystemd的说明进行操作，但它不起作用。经过一番研究，我发现了更多的脚本，其中最合理的一个是：

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[Unit]\nDescription=Rails-Puma Webserver\n\n[Service]\nType=simple\nUser=myuser\nWorkingDirectory=/home/myuser/apps/myapp\nExecStart=/home/myuser/.rvm/rubies/ruby-2.2.2/bin/systemd_rails server -e production\nTimeoutSec=15\nRestart=always\n\n[Install]\nWantedBy=multi-user.target\n

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我保存了上面的文件，然后/etc/systemd/system/rails-puma.service启用了它：sudo systemctl enable rails.service最后启动了它：sudo systemctl start rails-puma.service

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不幸的是这没有用。这是以下结果sudo systemctl status rails-puma.service：

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    \xe2\x97\x8f rails-puma.service - Rails-Puma Webserver\n   Loaded: loaded (/etc/systemd/system/rails-puma.service; enabled)\n   Active: failed (Result: start-limit) since Thu 2016-07-07 12:11:58 EDT; 4s ago\n  Process: 4373 ExecStart=/home/myuser/.rvm/rubies/ruby-2.2.2/bin/systemd_rails server -e production (code=exited, status=203/EXEC)\n Main PID: 4373 (code=exited, status=203/EXEC)\n\nJul 07 12:11:58 mrcProd systemd[1]: rails-puma.service: main process exited, code=exited, status=203/EXEC\nJul 07 12:11:58 mrcProd systemd[1]: Unit rails-puma.service entered failed state.\nJul 07 12:11:58 mrcProd systemd[1]: rails-puma.service start request repeated too quickly, refusing to start.\nJul 07 12:11:58 mrcProd systemd[1]: Failed to start Rails-Puma Webserver.\nJul 07 12:11:58 mrcProd systemd[1]: Unit rails-puma.service entered failed state.\n

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我在这里做错了什么？

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Answer 1

我有类似的服务，但我声明略有不同/etc/systemd/system/puma.service

[Unit]
Description=Puma Control
After=network.target auditd.service

[Service]
Type=oneshot
RemainAfterExit=yes
ExecStart=/etc/puma/puma-start
ExecStop=/etc/puma/puma-stop

[Install]
WantedBy=multi-user.target

然后在/etc/puma/puma-start

#!/bin/bash -

cd /home/changeuser/apps/changeapp/current && ( export RACK_ENV="production" ; /home/changeuser/.rvm/bin/rvm default do bundle exec puma -C /home/changeuser/apps/changeapp/shared/puma.rb --daemon )

并在/etc/puma/puma-stop

#!/bin/bash -

cd /home/changeuser/apps/changeapp/current && ( export RACK_ENV="production" ; /home/changeuser/.rvm/bin/rvm default do bundle exec pumactl -S /home/changeuser/apps/changeapp/shared/tmp/pids/puma.state stop )

设置完后记得执行

chmod +x /etc/puma/puma-start
chmod +x /etc/puma/puma-stop
systemctl enable puma

然后测试

systemctl start puma
systemctl stop puma
systemctl restart puma
systemctl status puma