（111：连接被拒绝）同时连接到上游。仅在网站的某些页面上。 Puma、Nginx、Capistrano

Question

我有一个 ruby on rails 项目，它使用 Nginx、Puma 和 Capistrano 托管在 Digital Ocean droplet 上。 我正在接管这个项目，但没有这个项目的跟踪回购。所以我拥有的唯一源代码在远程服务器上。 我必须通过 D.O UI 重新启动 Droplet 服务器才能访问控制台。重新启动后，某些页面未加载（而某些页面加载）。此时，对代码库进行了 zero 更改。 查看

production.log

，它针对未加载的页面吐出一个常见的一般错误：

TypeError (no implicit conversion of nil into String):
...
Completed 500 Internal Server Error in 11ms (Views: 10.0ms | Allocations: 3709)

所以我挖得更深。这就是我得到的

/var/log/nginx/error.log

：

2023/05/03 18:59:02 [crit] 16157#16157: *1 connect() to unix:///var/www/vhosts/myapp/shared/tmp/sockets/myapp-puma.sock failed (2: No such file or directory) while connecting to upstream, client: 100.11.109.141, server: ms.explore.myapp.com, request: "GET /users/sign_up HTTP/2.0", upstream: "http://unix:///var/www/vhosts/myapp/shared/tmp/sockets/myapp-puma.sock:/users/sign_up", host: "ms.explore.myapp.com", referrer: "https://ms.explore.myapp.com/users/sign_up"
2023/05/03 18:59:03 [crit] 16157#16157: *1 connect() to unix:///var/www/vhosts/myapp/shared/tmp/sockets/myapp-puma.sock failed (2: No such file or directory) while connecting to upstream, client: 100.11.109.141, server: ms.explore.myapp.com, request: "GET /users/sign_up HTTP/2.0", upstream: "http://unix:///var/www/vhosts/myapp/shared/tmp/sockets/myapp-puma.sock:/users/sign_up", host: "ms.explore.myapp.com", referrer: "https://ms.explore.myapp.com/users/sign_up"
2023/05/03 18:59:03 [crit] 16157#16157: *1 connect() to unix:///var/www/vhosts/myapp/shared/tmp/sockets/myapp-puma.sock failed (2: No such file or directory) while connecting to upstream, client: 100.11.109.141, server: ms.explore.myapp.com, request: "GET /users/sign_up HTTP/2.0", upstream: "http://unix:///var/www/vhosts/myapp/shared/tmp/sockets/myapp-puma.sock:/users/sign_up", host: "ms.explore.myapp.com", referrer: "https://ms.explore.myapp.com/users/sign_up"

我检查过

/var/www/vhosts/myapp/shared/tmp/sockets/myapp-puma.sock

存在。

这是 /etc/nginx/sites-available/myapp:

upstream puma {
        server unix:///var/www/vhosts/myapp/shared/tmp/sockets/myapp-puma.sock;
}

server {
        listen 80;
        server_name ms.explore.myapp.com;
        return 301 https://$host$request_uri;
}

server {
        listen 443 ssl http2;

        ssl_certificate /etc/letsencrypt/live/ms.explore.myapp.com/fullchain.pem;
        ssl_certificate_key /etc/letsencrypt/live/ms.explore.myapp.com/privkey.pem;

        server_name ms.explore.myapp.com;

        root /var/www/vhosts/myapp/current/public;

        add_header X-Frame-Options "DENY";

        location ^~ /(assets|packs)/ {
                gzip_static on;
                expires max;
                add_header Cache-Control public;
        }

        location = /robots.txt {
                add_header Content-Type text/plain;
                return 200 "User-agent: *\nAllow: /\n";
        }

        try_files $uri/index.html $uri @puma;

        location @puma {
                proxy_pass http://puma;
                proxy_set_header Host $host;
                proxy_set_header X-Real-IP $remote_addr;
                proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
                proxy_set_header X-Forwarded-Proto $scheme;
        }

        client_max_body_size 25M;

        rewrite ^/contacts/new$ /contact-us permanent;
        rewrite ^/program/resources/course-navigation$ /program/course-navigation permanent;
}

运行

ps aux | grep puma

显示puma连接到正确的sock文件：

deploy   16523  0.0  5.8 410660 120276 ?       S    18:59   0:00 puma 3.12.1 (unix:///var/www/vhosts/myapp/shared/tmp/sockets/myapp-puma.sock)
deploy   16525  0.0  6.3 1161592 130524 ?      Sl   18:59   0:00 puma: cluster worker 0: 16523
deploy   16536  0.0  6.4 1161592 131408 ?      Sl   18:59   0:00 puma: cluster worker 1: 16523
deploy   19690  0.0  0.0  14860  1072 pts/1    S+   19:16   0:00 grep --color=auto puma

这里会发生什么？我不太熟悉 Capistrano 和它的全部功能。我怀疑重启服务器会忽略 Capistrano 的自动设置步骤，这可能是配置 puma 服务工作者和 nginx 服务器错误。

我已经尝试分别用

sudo service puma restart

和

sudo service nginx restart

重启puma和nginx。以及尝试加载 D.O. 提供的备份。但似乎没有帮助。

我无法执行部署过程，因为我在本地没有源代码。 非常感谢一些服务器/ruby/rails 专家的帮助！提前谢谢你！

编辑 以下是更多相关信息：

config/deploy.rb

：

# config valid for current version and patch releases of Capistrano
lock "~> 3.17.0"

set :application, "myapp"
set :repo_url, "[email protected]:cra/myapp.git"

set :deploy_to, "/var/www/vhosts/myapp"


append :linked_files, "config/database.yml", "config/master.key", "config/features.yml"


append :linked_dirs, "log", "tmp/pids", "tmp/cache", "tmp/sockets", "public/system", "public/uploads", "vendor/bundle"


set :keep_releases, 3



set :keep_assets, 2

这里还有

config/deploy/ms-instance.rb

:

server "myapp-ms", user: "deploy", roles: %w(app db web)

set :puma_threads, [4, 16]
set :puma_workers, 2

set :pty,             true
set :use_sudo,        false
set :stage,           :production
set :puma_bind,       "unix://#{shared_path}/tmp/sockets/#{fetch(:application)}-puma.sock"
set :puma_state,      "#{shared_path}/tmp/pids/puma.state"
set :puma_pid,        "#{shared_path}/tmp/pids/puma.pid"
set :puma_access_log, "#{release_path}/log/puma.error.log"
set :puma_error_log,  "#{release_path}/log/puma.access.log"
set :puma_preload_app, true
set :puma_worker_timeout, nil
set :puma_init_active_record, true  # Change to false when not using ActiveRecord