python-3.x - 如何修复“NGNIX 504 网关超时”
问题描述
我正在设置一个运行 Flask 应用程序的新服务器。我正在运行 gunicorn 来运行存储在目录“ /home/abc/application ”中的烧瓶应用程序（app.py）
我的 gunicorn.conf 文件存储在运行 AWS linux 映像的 AWS EC2 实例中的“ /etc/tmpfiles.d/gunicorn.conf ”中。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
该文件如下所示 -
[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 {
# }
# }
}
}
配置完上述内容后，我启用了服务并运行它们。该网站没有出现，我收到 - 504 Gateway Time-out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"
gunicorn 服务的日志，如命令sudo journalctl -u gunicorn.service |所示 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-user 对目录的访问权限 -
sudo chown ec2-user.ec2-user abc/ -R
我已经尝试了很多教程，但我无法使其工作。你能帮我做错什么吗？我没有使用虚拟环境以及如何让网站在端口 8080 的本地主机上运行，以通过主机服务器上的代理运行。
解决方案
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。当您直接运行应用程序时，这不是问题，因为应用程序会读取系统变量。
可以在 gunicorn 环境文件或脚本中执行此操作的两个地方。（取决于用例）
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