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EC2でRailsアプリを起動したけどブラウザからアクセスできないとき

Last updated at Posted at 2018-05-17

環境

OSは AmazonLinux

$ ruby -v
ruby 2.5.1p57 (2018-03-29 revision 63029) [x86_64-linux]
$ rails -v
Rails 5.2.2

困ったこと

EC2インスタンスの中に、Railsアプリを作りました。

$ bundle exec rails server -p 3000
=> Booting Puma
=> Rails 5.2.0 application starting in development 
=> Run `rails server -h` for more startup options
Puma starting in single mode...
* Version 3.11.4 (ruby 2.5.1-p57), codename: Love Song
* Min threads: 5, max threads: 5
* Environment: development
* Listening on tcp://localhost:3000
Use Ctrl-C to stop

とやって、サーバーは起動しました。

ブラウザから

http://(インスタンスのパブリックIP address):3000

にアクセスすると

ng.png

になってしまいました。こまった。

解決策

-b 0.0.0.0 をつけるといい。

$ bundle exec rails server -p 3000 -b 0.0.0.0
=> Booting Puma
=> Rails 5.2.0 application starting in development 
=> Run `rails server -h` for more startup options
Puma starting in single mode...
* Version 3.11.4 (ruby 2.5.1-p57), codename: Love Song
* Min threads: 5, max threads: 5
* Environment: development
* Listening on tcp://0.0.0.0:3000
Use Ctrl-C to stop

ってやって http://(インスタンスのパブリックIP address):3000 にアクセスするとYay!

ok.png

こちらの情報をいただきました。ありがとうございます。

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