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Unicorn x Nginx x AWS で、*11 connect() to unix:/home/ec2-user/app/current/tmp/sockets/unicorn.sock failed (13: Permission denied) while connecting to upstream のエラーの回避方法

Last updated at Posted at 2015-01-07

ブラウザからNginx経由でUnicornに接続しようとした際に、502 Bad Gatewayが返却されてあれれってなったので調べました。

nginxのエラーログ

/var/log/nginx/app_error.log
*11 connect() to unix:/home/ec2-user/app/current/tmp/sockets/unicorn.sock failed (13: Permission denied) while connecting to upstream

どうもパーミッションがないとのことで、nginxを実行しているユーザを調べた所、

[ec2-user@ip-xxx.xxxx.xxx.xxx]$ ps aux | grep nginx
root      2089  0.0  0.0 109476  2124 ?        Ss   02:05   0:00 nginx: master process /usr/sbin/nginx -c /etc/nginx/nginx.conf
nginx 2091  0.0  0.0 109888  3248 ?        S    02:05   0:00 nginx: worker process

こんな感じでデフォルトだとnginxになっちゃうみたいですね。
以下の設定ファイルを書き換えて実行ユーザをec2-user(もしくはアプリケーションの実行ユーザ)に変更してあげれば解決できます。

/etc/nginx/nginx.conf
# For more information on configuration, see:
#   * Official English Documentation: http://nginx.org/en/docs/
#   * Official Russian Documentation: http://nginx.org/ru/docs/

#user  nginx;
user  ec2-user;
worker_processes  1;
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