rails server error `initialize': getaddrinfo: Name or service not known (SocketError)

Posted 2023-02-16

【中文标题】rails server error `initialize\': getaddrinfo: Name or service not known (SocketError)

【英文标题】：rails server error `initialize': getaddrinfo: Name or service not known (SocketError)rails server error `initialize': getaddrinfo: Name or service not known (SocketError)

【发布时间】：2017-04-14 01:05:41

【问题描述】：

我正在尝试设置一个新的 Rails 应用程序并不断收到以下堆栈跟踪：

=> Booting Puma
=> Rails 5.1.0.rc1 application starting in development on http://linux-my4o:3000
=> Run `rails server -h` for more startup options
Puma starting in single mode...
* Version 3.8.2 (ruby 2.4.0-p0), codename: Sassy Salamander
* Min threads: 5, max threads: 5
* Environment: development
* Listening on tcp://linux-my4o:9292
Exiting
/home/chris/.rvm/gems/ruby-2.4.0/gems/puma-3.8.2/lib/puma/binder.rb:269:in `initialize': getaddrinfo: Name or service not known (SocketError)
        from /home/chris/.rvm/gems/ruby-2.4.0/gems/puma-3.8.2/lib/puma/binder.rb:269:in `new'
        from /home/chris/.rvm/gems/ruby-2.4.0/gems/puma-3.8.2/lib/puma/binder.rb:269:in `add_tcp_listener'
        from /home/chris/.rvm/gems/ruby-2.4.0/gems/puma-3.8.2/lib/puma/binder.rb:105:in `block in parse'
        from /home/chris/.rvm/gems/ruby-2.4.0/gems/puma-3.8.2/lib/puma/binder.rb:88:in `each'
        from /home/chris/.rvm/gems/ruby-2.4.0/gems/puma-3.8.2/lib/puma/binder.rb:88:in `parse'
        from /home/chris/.rvm/gems/ruby-2.4.0/gems/puma-3.8.2/lib/puma/runner.rb:144:in `load_and_bind'
        from /home/chris/.rvm/gems/ruby-2.4.0/gems/puma-3.8.2/lib/puma/single.rb:87:in `run'
        from /home/chris/.rvm/gems/ruby-2.4.0/gems/puma-3.8.2/lib/puma/launcher.rb:172:in `run'
        from /home/chris/.rvm/gems/ruby-2.4.0/gems/puma-3.8.2/lib/rack/handler/puma.rb:64:in `run'
        from /home/chris/.rvm/gems/ruby-2.4.0/gems/rack-2.0.1/lib/rack/server.rb:296:in `start'
        from /home/chris/.rvm/gems/ruby-2.4.0/gems/railties-5.1.0.rc1/lib/rails/commands/server/server_command.rb:44:in `start'
        from /home/chris/.rvm/gems/ruby-2.4.0/gems/railties-5.1.0.rc1/lib/rails/commands/server/server_command.rb:130:in `block in perform'
        from /home/chris/.rvm/gems/ruby-2.4.0/gems/railties-5.1.0.rc1/lib/rails/commands/server/server_command.rb:125:in `tap'
        from /home/chris/.rvm/gems/ruby-2.4.0/gems/railties-5.1.0.rc1/lib/rails/commands/server/server_command.rb:125:in `perform'
        from /home/chris/.rvm/gems/ruby-2.4.0/gems/thor-0.19.4/lib/thor/command.rb:27:in `run'
        from /home/chris/.rvm/gems/ruby-2.4.0/gems/thor-0.19.4/lib/thor/invocation.rb:126:in `invoke_command'
        from /home/chris/.rvm/gems/ruby-2.4.0/gems/thor-0.19.4/lib/thor.rb:369:in `dispatch'
        from /home/chris/.rvm/gems/ruby-2.4.0/gems/railties-5.1.0.rc1/lib/rails/command/base.rb:63:in `perform'
        from /home/chris/.rvm/gems/ruby-2.4.0/gems/railties-5.1.0.rc1/lib/rails/command.rb:44:in `invoke'
        from /home/chris/.rvm/gems/ruby-2.4.0/gems/railties-5.1.0.rc1/lib/rails/commands.rb:16:in `<top (required)>'
        from /home/chris/Projects/cwatsondev-api/bin/rails:9:in `require'
        from /home/chris/Projects/cwatsondev-api/bin/rails:9:in `<top (required)>'
        from /home/chris/.rvm/gems/ruby-2.4.0/gems/spring-2.0.1/lib/spring/client/rails.rb:28:in `load'
        from /home/chris/.rvm/gems/ruby-2.4.0/gems/spring-2.0.1/lib/spring/client/rails.rb:28:in `call'
        from /home/chris/.rvm/gems/ruby-2.4.0/gems/spring-2.0.1/lib/spring/client/command.rb:7:in `call'
        from /home/chris/.rvm/gems/ruby-2.4.0/gems/spring-2.0.1/lib/spring/client.rb:30:in `run'
        from /home/chris/.rvm/gems/ruby-2.4.0/gems/spring-2.0.1/bin/spring:49:in `<top (required)>'
        from /home/chris/.rvm/gems/ruby-2.4.0/gems/spring-2.0.1/lib/spring/binstub.rb:31:in `load'
        from /home/chris/.rvm/gems/ruby-2.4.0/gems/spring-2.0.1/lib/spring/binstub.rb:31:in `<top (required)>'
        from /home/chris/Projects/cwatsondev-api/bin/spring:15:in `require'
        from /home/chris/Projects/cwatsondev-api/bin/spring:15:in `<top (required)>'
        from bin/rails:3:in `load'
        from bin/rails:3:in `<main>'

我以前在运行 Rails 服务器时从未见过这样的错误。我在 OpenSuse Tumbleweed 上使用 Rails 5.1.0.rc1。在我看来，主机名 linux-my4o 有问题。

【参考方案1】：

我想通了。只需在我的 etc/hosts 文件中添加一个新行。

127.0.0.1 linux-my4o

【讨论】：

我的主机文件中有127.0.0.1 localhost。但它不起作用。知道为什么吗？

【参考方案2】：

我通过在我的环境变量中添加以下几行来修复我的问题。对于 linux，我添加了以下行

export HOST="localhost"

如果这不起作用，尤其是因为 rails 抱怨 HOST envvar 将被贬值，请改用它

export BINDING="localhost"