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所以我的最终目标是让多个节点应用程序连接到同一个数据库并在用户之间共享会话。因此，如果您注销一个应用程序，它会注销所有应用程序，登录也是如此。所以这在我的开发环境中有效。我有两个 node express 应用程序连接到同一个 Mongo 会话数据库，所以我可以登录一个应用程序，另一个自动识别会话并将我登录。我已经将它推送到我们的实时 CentOS 服务器并使用 PM2 和 Nginx 服务它. 它目前正在为每个应用程序创建一个新的会话条目。两个应用程序对会话和用户使用相同的数据库。我可以在实时会话数据库中看到每个应用程序都有一个单独的会话。因此，我必须立即登录每个应用程序，而不是一个。这一定与 Nginx 有关，因为它在本地工作。

注意：我正在使用 connect-mongodb-session

这是我在每个 express 应用程序中的 main.js 文件（除端口号外，两者都相同）：

var MongoDBStore = require('connect-mongodb-session')(express.session);
var configDB = require('./config/database.js');
var env      = require('./config/env.js');

if(env.location == 'test'){
    var store = new MongoDBStore({
            uri: configDB.sessions_url,
            collection: 'sess'
        });
}else if(env.location == 'live'){
    var store = new MongoDBStore({
            uri: configDB.sessions_url_live,
            collection: 'sess'
        });
}

// Catch errors
store.on('error', function(error) {
    assert.ifError(error);
    assert.ok(false);
});

var app      = express();
var port     = process.env.PORT || 3008; 
var mongoose = require('mongoose');
var passport = require('passport');
var path     = require('path');

app.configure(function() {

    app.use(express.cookieParser()); // read cookies (needed for auth)
    app.use(express.bodyParser()); // get information from html forms
        app.use(express.static(path.join(__dirname, '/static')));

    app.use(express.session({
        secret: 'supercoolpassword',
        cookie: {
            maxAge: 1000 * 60 * 60 * 24 * 7 // 1 week
        },
        resave: true,
        saveUninitialized: true,
        store: store,
        name: "id",
        proxy: true
    }));

    app.use(passport.initialize());
    app.use(passport.session()); // persistent login sessions

});

这是我的 nginx 配置文件。我在这里尝试了添加“proxy_set_header X-Forwarded-Proto $scheme”的建议：

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

# Load dynamic modules. See /usr/share/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;

upstream my_nodejs_upstream {
    server orders.domain.com;
    keepalive 64;
}

server {
    listen 80;
    server_name orders.domain.com;

    location / {
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_set_header Host $http_host;
        proxy_set_header X-NginX-Proxy true;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        proxy_max_temp_file_size 0;
        proxy_pass http://localhost:3008;
        proxy_redirect off;
        proxy_read_timeout 240s;
    }
}

server {
        listen 443 ssl;
        server_name orders.domain.com;

   
        ssl_certificate "/etc/nginx/ssl/certs/nginx-selfsigned.crt";
        ssl_certificate_key "/etc/nginx/ssl/private/nginx-selfsigned.key";
        ssl_protocols TLSv1 TLSv1.1 TLSv1.2;

        location / {
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header X-Forwarded-Proto $scheme;
            proxy_set_header Host $http_host;
            proxy_set_header X-NginX-Proxy true;
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";
            proxy_max_temp_file_size 0;
            proxy_pass http://localhost:3008;
            proxy_redirect off;
            proxy_read_timeout 240s;
        }
    }

server {
listen 80;
server_name home.domain.com;

location / {
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header X-Forwarded-Proto $scheme;
    proxy_set_header Host $http_host;
    proxy_set_header X-NginX-Proxy true;
    proxy_http_version 1.1;
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection "upgrade";
    proxy_max_temp_file_size 0;
    proxy_pass http://localhost:3009;
    proxy_redirect off;
    proxy_read_timeout 240s;
   }
}

server {
    listen 443 ssl;
    server_name home.domain.com;


    ssl_certificate "/etc/nginx/ssl/certs/nginx-selfsigned.crt";
    ssl_certificate_key "/etc/nginx/ssl/private/nginx-selfsigned.key";
    ssl_protocols TLSv1 TLSv1.1 TLSv1.2;

    location / {
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_set_header Host $http_host;
        proxy_set_header X-NginX-Proxy true;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        proxy_max_temp_file_size 0;
        proxy_pass http://localhost:3009;
        proxy_redirect off;
        proxy_read_timeout 240s;
    }
}


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

    # 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 {
    }
}
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