PUMA ArgumentError:找不到登录名--扩展‘~’

Question

因为某些原因不能启动美洲狮。获取此错误

ArgumentError: couldn't find login name -- expanding `~'

使用下面的反向跟踪

Feb 03 15:44:21 shopify-shipping-refactor puma[3061]: Done in 1.33s.
Feb 03 15:44:25 shopify-shipping-refactor puma[3061]: rake aborted!
Feb 03 15:44:25 shopify-shipping-refactor puma[3061]: ArgumentError: couldn't find login name -- expanding `~'
Feb 03 15:44:25 shopify-shipping-refactor puma[3061]: /usr/local/rvm/gems/ruby-2.6.5/gems/pry-0.12.2/lib/pry/pry_class.rb:5:in `expand_path'     
Feb 03 15:44:25 shopify-shipping-refactor puma[3061]: /usr/local/rvm/gems/ruby-2.6.5/gems/pry-0.12.2/lib/pry/pry_class.rb:5:in `<class:Pry>'     
Feb 03 15:44:25 shopify-shipping-refactor puma[3061]: /usr/local/rvm/gems/ruby-2.6.5/gems/pry-0.12.2/lib/pry/pry_class.rb:1:in `<top (required)>'
Feb 03 15:44:25 shopify-shipping-refactor puma[3061]: /usr/local/rvm/gems/ruby-2.6.5/gems/pry-0.12.2/lib/pry.rb:119:in `require'
Feb 03 15:44:25 shopify-shipping-refactor puma[3061]: /usr/local/rvm/gems/ruby-2.6.5/gems/pry-0.12.2/lib/pry.rb:119:in `<top (required)>'
Feb 03 15:44:25 shopify-shipping-refactor puma[3061]: /usr/local/rvm/gems/ruby-2.6.5/gems/bundler-2.1.4/lib/bundler/runtime.rb:74:in `require'
Feb 03 15:44:25 shopify-shipping-refactor puma[3061]: /usr/local/rvm/gems/ruby-2.6.5/gems/bundler-2.1.4/lib/bundler/runtime.rb:74:in `block (2 levels) in require'        
Feb 03 15:44:25 shopify-shipping-refactor puma[3061]: /usr/local/rvm/gems/ruby-2.6.5/gems/bundler-2.1.4/lib/bundler/runtime.rb:69:in `each'
Feb 03 15:44:25 shopify-shipping-refactor puma[3061]: /usr/local/rvm/gems/ruby-2.6.5/gems/bundler-2.1.4/lib/bundler/runtime.rb:69:in `block in require'
Feb 03 15:44:25 shopify-shipping-refactor puma[3061]: /usr/local/rvm/gems/ruby-2.6.5/gems/bundler-2.1.4/lib/bundler/runtime.rb:58:in `each'
Feb 03 15:44:25 shopify-shipping-refactor puma[3061]: /usr/local/rvm/gems/ruby-2.6.5/gems/bundler-2.1.4/lib/bundler/runtime.rb:58:in `require'
Feb 03 15:44:25 shopify-shipping-refactor puma[3061]: /usr/local/rvm/gems/ruby-2.6.5/gems/bundler-2.1.4/lib/bundler.rb:174:in `require'
Feb 03 15:44:25 shopify-shipping-refactor puma[3061]: /opt/shopify_shipping_refactor/config/application.rb:7:in `<top (required)>'
Feb 03 15:44:25 shopify-shipping-refactor puma[3061]: /opt/shopify_shipping_refactor/Rakefile:4:in `require'
Feb 03 15:44:25 shopify-shipping-refactor puma[3061]: /opt/shopify_shipping_refactor/Rakefile:4:in `<top (required)>'
Feb 03 15:44:25 shopify-shipping-refactor puma[3061]: /usr/local/rvm/gems/ruby-2.6.5/gems/rake-13.0.1/exe/rake:27:in `<top (required)>'
Feb 03 15:44:25 shopify-shipping-refactor puma[3061]: /usr/local/rvm/gems/ruby-2.6.5/bin/ruby_executable_hooks:24:in `eval'
Feb 03 15:44:25 shopify-shipping-refactor puma[3061]: /usr/local/rvm/gems/ruby-2.6.5/bin/ruby_executable_hooks:24:in `<main>'
Feb 03 15:44:25 shopify-shipping-refactor puma[3061]: (See full trace by running task with --trace)
Feb 03 15:44:25 shopify-shipping-refactor systemd[1]: puma.service: Control process exited, code=exited status=1
Feb 03 15:44:25 shopify-shipping-refactor systemd[1]: Failed to start puma.service.
Feb 03 15:44:25 shopify-shipping-refactor systemd[1]: puma.service: Unit entered failed state.
Feb 03 15:44:25 shopify-shipping-refactor systemd[1]: puma.service: Failed with result 'exit-code'.

Answer 1

分析:Ruby的expand_path调用基于C的运行时(模糊了堆栈跟踪)，但最终在rb_default_home_dir中结束，以弄清楚'~'是什么。此方法依赖于$HOME环境变量来解决此问题，如果不可用，则返回到getlogin() (getlogin(3))和getpwnam()。

原因：您看到的错误消息来自于回退失败，因为(可能)您的进程没有注册到控制tty和登录的用户。

解决方案：在运行puma时设置$HOME。在指定'~'时，使用您希望Puma用作主目录的目录。