如何修复 "NGNIX 504 Gateway Time-out"

How to fix "NGNIX 504 Gateway Time-out"

我正在设置一个新服务器,它正在 运行Ning Flask 应用程序。我正在 运行ning gunicorn 到 运行 我的烧瓶应用程序(app.py),它存储在目录“/home/abc/application

我的 gunicorn.conf 文件存储在 AWS EC2 实例中的“/etc/tmpfiles.d/gunicorn.conf” 运行ning AWS linux 图片。该文件的配置是 - “d /run/gunicorn 0755 abc abc -

我的 Gunicorn 服务 文件看起来像 - 位于 /etc/systemd/system/gunicorn.service

文件如下所示 -

[Unit]
Description=gunicorn daemon
After=network.target

[Service]
User=ec2-user
Group=ec2-user
WorkingDirectory=/home/abc/application
ExecStart=/usr/local/bin/gunicorn --bind 127.0.0.1:8080 --timeout 60 --log-level=debug wsgi
Restart=always

[Install]
WantedBy=multi-user.target

我的 /etc/nginx/nginx.conf 文件如下所示 -

# 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 /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;

    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 / {
            proxy_pass http://127.0.0.1:8080;
            proxy_set_header Host $host;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        }
    }

    # 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/tls/certs/ssl-bundle.crt";
            ssl_certificate_key "/etc/pki/tls/private/server.key";
            ssl_session_cache shared:SSL:1m;
            ssl_session_timeout  10m;

        location / {
            proxy_pass http://127.0.0.1:8080;
            proxy_set_header Host $host;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_connect_timeout 600;
        proxy_send_timeout 600;
        proxy_read_timeout 600;
        send_timeout 600;
        }
    #        ssl_ciphers HIGH:!aNULL:!MD5;
    #        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 {
    #        }
    #    }
    }
}

配置完以上内容后,我启用了服务并 运行 它们。该网站没有出现,我收到 - 504 网关超时 消息

ngnix 的错误日志显示 -

2019/04/18 10:22:58 [error] 2417#0: *1 connect() failed (111: Connection refused) while connecting to upstream, client: x.x.x.x, server: _, request: "GET / HTTP/1.1", upstream: "http://127.0.0.1:8000/", host: "xyz.com"
2019/04/18 10:48:42 [error] 2417#0: *3 connect() failed (111: Connection refused) while connecting to upstream, client: y.a.b.c, server: _, request: "GET /home HTTP/1.1", upstream: "http://127.0.0.1:8000/home", host: "xyz.com"
2019/04/18 11:11:31 [error] 11938#0: *1 connect() failed (111: Connection refused) while connecting to upstream, client: y.a.b.c, server: _, request: "GET / HTTP/1.1", upstream: "http://127.0.0.1:8000/", host: "xyz.com"
2019/04/18 11:15:13 [error] 11938#0: *3 connect() failed (111: Connection refused) while connecting to upstream, client: y.a.b.c, server: _, request: "GET / HTTP/1.1", upstream: "http://127.0.0.1:8000/", host: "xyz.com"
2019/04/18 11:49:22 [error] 20052#0: *1 connect() failed (111: Connection refused) while connecting to upstream, client: y.a.b.c, server: _, request: "GET / HTTP/1.1", upstream: "http://127.0.0.1:8000/", host: "xyz.com"
2019/04/18 13:58:39 [error] 19953#0: *1 connect() failed (111: Connection refused) while connecting to upstream, client: x.x.x.x, server: _, request: "GET / HTTP/1.1", upstream: "http://127.0.0.1:8000/", host: "xyz.com"
2019/04/18 14:03:42 [error] 20764#0: *1 upstream timed out (110: Connection timed out) while reading response header from upstream, client: x.x.x.x, server: _, request: "GET / HTTP/1.1", upstream: "http://127.0.0.1:8080/", host: "xyz.com"
2019/04/18 14:06:13 [error] 21307#0: *1 upstream timed out (110: Connection timed out) while reading response header from upstream, client: x.x.x.x, server: _, request: "GET / HTTP/1.1", upstream: "http://127.0.0.1:8080/", host: "xyz.com"
2019/04/18 14:10:31 [error] 21307#0: *3 upstream timed out (110: Connection timed out) while reading response header from upstream, client: x.x.x.x, server: _, request: "GET / HTTP/1.1", upstream: "http://127.0.0.1:8080/", host: "xyz.com"
2019/04/18 14:16:39 [error] 21307#0: *5 upstream timed out (110: Connection timed out) while reading response header from upstream, client: x.x.x.x, server: _, request: "GET / HTTP/1.1", upstream: "http://127.0.0.1:8080/", host: "a.b.c.d"
2019/04/18 14:17:39 [error] 21307#0: *7 upstream timed out (110: Connection timed out) while reading response header from upstream, client: x.x.x.x, server: _, request: "GET / HTTP/1.1", upstream: "http://127.0.0.1:8080/", host: "a.b.c.d"
2019/04/18 15:46:16 [error] 21307#0: *9 upstream timed out (110: Connection timed out) while reading response header from upstream, client: y.a.b.c, server: _, request: "GET / HTTP/1.1", upstream: "http://127.0.0.1:8080/", host: "xyz.com"
2019/04/18 16:01:25 [error] 21307#0: *11 upstream timed out (110: Connection timed out) while reading response header from upstream, client: y.a.b.c, server: _, request: "GET / HTTP/1.1", upstream: "http://127.0.0.1:8080/", host: "xyz.com"
2019/04/18 16:08:27 [error] 12330#0: *1 upstream timed out (110: Connection timed out) while reading response header from upstream, client: x.x.x.x, server: _, request: "GET / HTTP/1.1", upstream: "http://127.0.0.1:8080/", host: "xyz.com"
2019/04/18 16:28:23 [error] 12330#0: *3 upstream timed out (110: Connection timed out) while reading response header from upstream, client: y.a.b.c, server: _, request: "GET / HTTP/1.1", upstream: "http://127.0.0.1:8080/", host: "xyz.com"
2019/04/18 16:54:22 [error] 12330#0: *5 upstream timed out (110: Connection timed out) while reading response header from upstream, client: y.a.b.c, server: _, request: "GET / HTTP/1.1", upstream: "http://127.0.0.1:8080/", host: "xyz.com"

命令 sudo journalctl -u gunicorn.service | 显示的 gunicorn 服务日志tail -n 25 是-

`Apr 19 07:08:14 ip-x.x.x.x.ec2.internal gunicorn[21683]: [2019-04-19 07:08:14 -0400] [5762] [INFO] Booting worker with pid: 5762
Apr 19 07:08:14 ip-x.x.x.x.ec2.internal gunicorn[21683]: HI 2019-04-19 07:08:14,702 - console - DEBUG - Debug CONSOLE
Apr 19 07:09:14 ip-x.x.x.x.ec2.internal gunicorn[21683]: [2019-04-19 07:09:14 -0400] [21683] [CRITICAL] WORKER TIMEOUT (pid:5762)
Apr 19 07:09:14 ip-x.x.x.x.ec2.internal gunicorn[21683]: [2019-04-19 07:09:14 -0400] [5944] [INFO] Booting worker with pid: 5944
Apr 19 07:09:15 ip-x.x.x.x.ec2.internal gunicorn[21683]: HI 2019-04-19 07:09:15,070 - console - DEBUG - Debug CONSOLE
Apr 19 07:10:14 ip-x.x.x.x.ec2.internal gunicorn[21683]: [2019-04-19 07:10:14 -0400] [21683] [CRITICAL] WORKER TIMEOUT (pid:5944)
Apr 19 07:10:14 ip-x.x.x.x.ec2.internal gunicorn[21683]: [2019-04-19 07:10:14 -0400] [6135] [INFO] Booting worker with pid: 6135
Apr 19 07:10:15 ip-x.x.x.x.ec2.internal gunicorn[21683]: HI 2019-04-19 07:10:15,361 - console - DEBUG - Debug CONSOLE
Apr 19 07:11:14 ip-x.x.x.x.ec2.internal gunicorn[21683]: [2019-04-19 07:11:14 -0400] [21683] [CRITICAL] WORKER TIMEOUT (pid:6135)
Apr 19 07:11:14 ip-x.x.x.x.ec2.internal gunicorn[21683]: [2019-04-19 07:11:14 -0400] [6317] [INFO] Booting worker with pid: 6317
Apr 19 07:11:15 ip-x.x.x.x.ec2.internal gunicorn[21683]: HI 2019-04-19 07:11:15,454 - console - DEBUG - Debug CONSOLE`

我确实执行了以下命令以授予 ec2 用户访问目录的权限 -

sudo chown ec2-user.ec2-user abc/ -R

我已经尝试了很多教程,但我无法使它起作用。你能帮我做错什么吗?我没有使用虚拟环境,以及如何通过主机服务器上的代理将本地主机上端口 8080 上的网站 运行ning 访问到 运行。

我喜欢这个答案。即使设置正确,环境变量也不会直接从脚本中读取。所以我不得不在 app.py 脚本中声明环境变量。当您 运行 应用程序直接读取系统变量时,这不是问题。

gunicorn 环境文件或脚本中有两个地方可以完成此操作。 (取决于用例)