Nginxで不明なエラー。（capistrano + nginx + unicorn)

前提・実現したいこと

先日完成したRailsアプリケーションをデプロイしようとしたところNginxでエラーが起こってしまいました。対処法を調べても見つからなかったので質問させていただきます。

Nginx + Unicorn + Capistranoを利用した自動デプロイの途中です。

bundle exec cap production deployをすると、偶に DEBUG [18a39419] Finished in 0.614 seconds with exit status 1 (failed).のようにfailedと言われる部分もありましたが途中でエラーで中断されることもなく最後まで進みました。

いざIPアドレスにアクセスしてみるとWe're sorry, but something went wrong.の文字、、、。

$ ps auxwww | grep unicornでunicorn masterをkillして再デプロイしても変わらず、mysqlを見てみても

$ sudo service mysqld restart
Stopping mysqld:                                   [  OK  ]
Starting mysqld:                                   [  OK  ]

異常はなし。

発生している問題・エラーメッセージ

nginxの様子を確かめてみると

[Stelle@ip-x-x-x-x ~]$ nginx -t
nginx: [alert] could not open error log file: open() "/var/log/nginx/error.log" failed (13: Permission denied)
2020/07/06 06:51:02 [warn] 12762#0: the "user" directive makes sense only if the master process runs with super-user privileges, ignored in /etc/nginx/nginx.conf:5
2020/07/06 06:51:02 [emerg] 12762#0: "client_max_body_size" directive is duplicate in /etc/nginx/conf.d/stelle2.conf:5
nginx: configuration file /etc/nginx/nginx.conf test failed

と言われたので$ sudo cat /var/log/nginx/error.logをしてみると

2020/07/06 04:42:57 [emerg] 12186#0: "client_max_body_size" directive is duplicate in /etc/nginx/conf.d/stelle2.conf:5

といわれ、/etc/nginx/conf.dからsudo rm stelle2.confをしてもう一度$ sudo cat /var/log/nginx/error.logしても同じく

2020/07/06 04:42:57 [emerg] 12186#0: "client_max_body_size" directive is duplicate in /etc/nginx/conf.d/stelle2.conf:5

と言われるだけでした。。。

該当ファイル

/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;
worker_processes auto;
error_log /var/log/nginx/error.log;
pid /var/run/nginx.pid;

# Load dynamic modules. See /usr/share/doc/nginx/README.dynamic.include /usr/share/nginx/modules/*.conf;

events {
    worker_connections 1024;
}

http {
    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';

    access_log  /var/log/nginx/access.log  main;

    sendfile            on;
    tcp_nopush          on;
    tcp_nodelay         on;
    keepalive_timeout   65;
    types_hash_max_size 2048;

    include             /etc/nginx/mime.types;
    default_type        application/octet-stream;

    # Load modular configuration files from the /etc/nginx/conf.d directory.
    # See http://nginx.org/en/docs/ngx_core_module.html#include
    # for more information.
    include /etc/nginx/conf.d/*.conf;

    index   index.html index.htm;

    server {
        listen       80 default_server;
        listen       [::]:80 default_server;
        server_name  localhost;
        root         /usr/share/nginx/html;

        # Load configuration files for the default server block.
        include /etc/nginx/default.d/*.conf;

        location / {
        }

        # redirect server error pages to the static page /40x.html
        #
        error_page 404 /404.html;
            location = /40x.html {
        }

        # redirect server error pages to the static page /50x.html
        #
        error_page 500 502 503 504 /50x.html;
            location = /50x.html {
        }

        # proxy the PHP scripts to Apache listening on 127.0.0.1:80
        #
        #location ~ .php$ {
        #    proxy_pass   http://127.0.0.1;
        #}

        # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
        #
        #location ~ .php$ {
        #    root           html;
        #    fastcgi_pass   127.0.0.1:9000;
        #    fastcgi_index  index.php;
        #    fastcgi_param  SCRIPT_FILENAME  /scripts$fastcgi_script_name;
        #    include        fastcgi_params;
        #}

        # deny access to .htaccess files, if Apache's document root
        # concurs with nginx's one
        #
        #location ~ /.ht {
        #    deny  all;
        #}
    }

# Settings for a TLS enabled server.
#
#    server {
#        listen       443 ssl http2 default_server;
#        listen       [::]:443 ssl http2 default_server;
#        server_name  _;
#        root         /usr/share/nginx/html;
#
#        ssl_certificate "/etc/pki/nginx/server.crt";
#        ssl_certificate_key "/etc/pki/nginx/private/server.key";
#        # It is *strongly* recommended to generate unique DH parameters
#        # Generate them with: openssl dhparam -out /etc/pki/nginx/dhparams.pem 2048
#        #ssl_dhparam "/etc/pki/nginx/dhparams.pem";
#        ssl_session_cache shared:SSL:1m;
#        ssl_session_timeout  10m;
#        ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
#        ssl_ciphers HIGH:SEED:!aNULL:!eNULL:!EXPORT:!DES:!RC4:!MD5:!PSK:!RSAPSK:!aDH:!aECDH:!EDH-DSS-DES-CBC3-SHA:!KRB5-DES-CBC3-SHA:!SRP;
#        ssl_prefer_server_ciphers on;
#
#        # Load configuration files for the default server block.
#        include /etc/nginx/default.d/*.conf;
#
#        location / {
#        }
#
#        error_page 404 /404.html;
#            location = /40x.html {
#        }
#
#        error_page 500 502 503 504 /50x.html;
#            location = /50x.html {
#        }
#    }

}

本命である/etc/nginx/conf.d/Stelle.confです

  error_log  /var/www/rails/stelle/current/log/nginx.error.log;
  access_log /var/www/rails/stelle/current/log/nginx.access.log;
  client_max_body_size 2G;
  upstream app_server {
    server unix:/var/www/rails/stelle/current/tmp/sockets/.unicorn.sock fail_timeout=0;
  }
  server {
    listen 80;
    server_name 3.xxx.xxx.xx;
    keepalive_timeout 5;
    root /var/www/rails/stelle/current/public;
    try_files $uri/index.html $uri.html $uri @app;
    location @app {
      # HTTP headers
      proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
      proxy_set_header Host $http_host;
      proxy_redirect off;
      proxy_pass http://app_server;
    }
    error_page 500 502 503 504 /500.html;
    location = /500.html {
      root /var/www/rails/stelle/current/public;
    }
  }

config.ruです

# This file is used by Rack-based servers to start the application.

require_relative 'config/environment'

run Rails.application

エラーの意味だけでも教えていただけたら幸いです。。。

yukky1201

2020/07/06 08:10

stelle2.confは本当に削除されていますか？(rmコマンド実行後に確認しましたか) もし、残っていればファイルの設定内容を質問に追記してください

sakanafuto

2020/07/06 08:37

確認してみたところ削除されていました。もう一度~から$ nginx -tをしてみると nginx: [alert] could not open error log file: open() "/var/log/nginx/error.log" failed (13: Permission denied) 2020/07/06 08:30:02 [warn] 742#0: the "user" directive makes sense only if the master process runs with super-user privileges, ignored in /etc/nginx/nginx.conf:5 nginx: the configuration file /etc/nginx/nginx.conf syntax is ok 2020/07/06 08:30:02 [emerg] 742#0: open() "/var/run/nginx.pid" failed (13: Permission denied) nginx: configuration file /etc/nginx/nginx.conf test failed となりました。 /etc/nginx/conf.d/Stelle.confも追加しました。

yukky1201

2020/07/06 09:10

# nginx -t (rootで実行) または $ sudo nginx -t (root権限で実行) するとどうなりますか

sakanafuto

2020/07/06 09:21

[Stelle@x.xxx.xxx.xx ~]$ nginx -t nginx: [alert] could not open error log file: open() "/var/log/nginx/error.log" failed (13: Permission denied) 2020/07/06 09:17:19 [warn] 871#0: the "user" directive makes sense only if the master process runs with super-user privileges, ignored in /etc/nginx/nginx.conf:5 nginx: the configuration file /etc/nginx/nginx.conf syntax is ok 2020/07/06 09:17:19 [emerg] 871#0: open() "/var/run/nginx.pid" failed (13: Permission denied) nginx: configuration file /etc/nginx/nginx.conf test failed [Stelle@x.xxx.xxx.xx ~]$ sudo nginx -t nginx: the configuration file /etc/nginx/nginx.conf syntax is ok nginx: [emerg] open() "/var/www/rails/stelle/current/log/nginx.error.log" failed (2: No such file or directory) nginx: configuration file /etc/nginx/nginx.conf test failed 違いが出ました。エラーログについてもう少し見てみます。

yukky1201

2020/07/07 01:31

"/var/www/rails/stelle/current/log/nginx.error.log" failed (2: No such file or directory) に関しては、手動でファイルを作成しておくか、該当ディレクトリがnginxユーザの書き込み権限があるか確認してください。

sakanafuto

2020/07/07 02:10

(local)と(server)とでパスが違っていたことがわかり、(local)の「app_path = '/var/www/stelle'」の通り(server)側の「/etc/nginx/conf.d/Stelle.conf」内の/var/www/rails/stelleの記述を全て/var/www/stelleに修正しました。その結果 [Stelle@xxx stelle]$ nginx -t nginx: [alert] could not open error log file: open() "/var/log/nginx/error.log" failed (13: Permission denied) 2020/07/07 01:58:24 [warn] 29752#0: the "user" directive makes sense only if the master process runs with super-user privileges, ignored in /etc/nginx/nginx.conf:5 nginx: the configuration file /etc/nginx/nginx.conf syntax is ok 2020/07/07 01:58:24 [emerg] 29752#0: open() "/var/run/nginx.pid" failed (13: Permission denied) nginx: configuration file /etc/nginx/nginx.conf test failed とPermission deniedとなってしまいました。nginxを再起動させてもダメでした。 /etc/nginx/nginx.conf:5ですから「user nginx;」に問題があるのでしょうか。。。

yukky1201

2020/07/07 02:59

nginx -tは管理者権限で実行してください

sakanafuto

2020/07/07 03:58

[Stelle@x.x.x.x stelle]$ sudo nginx -t [sudo] password for Stelle: nginx: the configuration file /etc/nginx/nginx.conf syntax is ok nginx: configuration file /etc/nginx/nginx.conf test is successful こちらでは成功していました。他も確かめるために、 [Stelle@x.x.x.x stelle]$ cd /var/www/stelle/current/log をして$ tail unicorn.rbをすると /var/www/stelle/shared/bundle/ruby/2.6.0/gems/rack-2.2.3/lib/rack/builder.rb:125:in `initialize' config.ru:1:in `new' config.ru:1:in `<main>' /var/www/stelle/shared/bundle/ruby/2.6.0/gems/unicorn-5.5.5/lib/unicorn.rb:54:in `eval' /var/www/stelle/shared/bundle/ruby/2.6.0/gems/unicorn-5.5.5/lib/unicorn.rb:54:in `block in builder' /var/www/stelle/shared/bundle/ruby/2.6.0/gems/unicorn-5.5.5/lib/unicorn/http_server.rb:795:in `build_app!' /var/www/stelle/shared/bundle/ruby/2.6.0/gems/unicorn-5.5.5/lib/unicorn/http_server.rb:141:in `start' /var/www/stelle/shared/bundle/ruby/2.6.0/gems/unicorn-5.5.5/bin/unicorn:128:in `<top (required)>' /var/www/stelle/shared/bundle/ruby/2.6.0/bin/unicorn:23:in `load' /var/www/stelle/shared/bundle/ruby/2.6.0/bin/unicorn:23:in `<top (required)>' というログが出てきました。。。 config.ruは一切弄っていません。

sakanafuto

2020/07/07 05:21

更にエラーログを見てみるとArgumentError: Missing required arguments: aws_access_key_id, aws_secret_access_keyが見つかりました。こちらはネットに情報がたくさんあるのでがんばります。