NGINX 502 错误网关gunicorn 超时

Question

将数据保存到数据库时弹出 502 bad gateway 错误。

用户登录 django 应用程序 (OLE 7) 后。从 ldap 服务器提取有关该用户的数据并将其保存在我的本地数据库（postgres）中。配置 nginx 后，它在本地服务器上运行得很好，gunicorn 一旦用户登录网站，而不是显示检索到的数据，它会显示 502 Bad gateway。我浏览了很多关于此问题的 stackoverflow 帖子，有些人说增加超时，检查 Gunicorn 是否正在运行。我已经尝试过这一切，但仍然行不通。

nginx.conf

    user  nginx;
worker_processes  2;

error_log  /var/log/nginx/error.log warn;
pid        /var/run/nginx.pid;


events {
worker_connections  1024;
}
er  nginx;
worker_processes  2;

error_log  /var/log/nginx/error.log warn;
pid        /var/run/nginx.pid;


events {
  worker_connections  1024;
}


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

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;

keepalive_timeout  300;

#gzip  on;
upstream app_server {
    server 10.111.xxx.xxx:8001 fail_timeout=0;
}

server{
 listen 80;
 server_name 10.111.xxx.xxx;
 location = /favicon.ico { access_log off; log_not_found off; }
 location /static/ {root /home/lisa/revcon;}
 location / {
    proxy_set_header Host $http_host;
    proxy_set_header Connection "";
    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;
    proxy_pass http://unix:/home/lisa/revcon/revcon.sock;
    proxy_connect_timeout 500s;
    proxy_read_timeout 600s;
}

视图.py

 def save_information(request):

associate_id = id_to_numeric(request.user.username)
ldap = Ldap()

associate_details = ldap.search(associate_id=associate_id)[0]

details = UserDetails(
    associate_name=associate_details['name'],
    associate_nbr=associate_id,
    associate_email=associate_details['email'],
   associate_department_id=id_to_numeric(associate_details['department']),
    associate_mgr=associate_details['managerCN'],
    associate_exec=associate_details['execCN'],
    associate_org=associate_details['org'],
    associate_image=img,
    date_of_service=rcm_date,
    title=associate_details['title'],
    client=client,
    lob=lob,
    phone_number=associate_details['mobile'],
)
details.save()
messages.success(request, 'Profile created! ')
return redirect('/?submit=true')

nginx 错误日志如下所示：

2019/05/15 04:01:55 [错误] 7602#7602: *1 从上游读取响应头时上游过早关闭连接，客户端：10.111.044.xxx，服务器：10.111.xxx.xxx，请求：“POST /save_information HTTP/1.1"，上游：" http://unix:/home/lisa/revcon/revcon.sock:/save_information "，主机："10.111.xxx.xxx"，引用者：" http://10.111。 xxx.xxx/pr/ “

古尼康 SELECT "django_session"."session_key", "django_session"."session_data", "django_session"."expire_date" FROM "django_session" WHERE ("django_session"."session_key" = 'hzy3dsjxfzqxhds6kd5uyteux0gps9d1' AND "django_session"."expire_date" > '2019-05-15T09:04:53.974657+00:00'::timestamptz); args=('hzy3dsjxfzqxhds6kd5uyteux0gps9d1', datetime.datetime(2019, 5, 15, 9, 4, 53, 974657, tzinfo=)) (0.001) SELECT "auth_user"."id", "auth_user"."password", "auth_user"."last_login", "auth_user"."is_superuser", "auth_user"."username", "auth_user"."first_name", "auth_user"."last_name", "auth_user"."email", "auth_user"."is_staff", "auth_user"."is_active", "auth_user"."date_joined" FROM "auth_user" WHERE "auth_user"."id" = 1; args=(1,) (0.001) SELECT (1) AS "a" FROM "CollectData_userdetails" WHERE "CollectData_userdetails"."associate_nbr" = '050667' LIMIT 1; args=(u'050667',) Exception while resolving variable 'img' in template 'CreateUser.html'. Traceback (most recent call last): File "/home/lisa/revcon/env/lib/python2.7/site-packages/django/template/base.py", line 903, in _resolve_lookup (bit, current)) # missing attribute VariableDoesNotExist: Failed lookup for key [img] in u'[{\'False\': False, \'None\': None, \'True\': True}, {u\'csrf_token\': , \'user\': >, \'perms\': , \'DEFAULT_MESSAGE_LEVELS\': {\'DEBUG\': 10, \'INFO\': 20, \'WARNING\': 30, \'SUCCESS\': 25, \'ERROR\': 40}, \'messages\': , u\'request\': }, {}, {\'form\': }, {\'block\': \n, , \n\n\n\n, , , , Associate \'>, , , , , , , , , , \n\n\t\t\t , , \\n\\t\\t\\t , , \\n]>}]' Exception while resolving variable 'tag' in template 'bootstrap4/field.html'.

它点击这个url url('save_information',views.save_information,name='save_information')，然后失败。502 错误。

Answer 1

我想到了。在 /etc/systemd/system/gunicorn i 服务中的 Gunicorn.service 文件中。我做了一个改变：添加了超时。Gunicorn 的默认超时为 30 秒，因此我更新为 120 秒。

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

[Service]
User=lisa
Group=nginx
Restart=on-failure
WorkingDirectory=/home/lisa/revcon
ExecStart=/home/lisa/revcon/env/bin/gunicorn --**timeout 120** --workers 5 
--bind unix:/home/lisa/revcon/env.sock revcon.wsgi:application

[Install]
WantedBy=multi-user.target
~

它对我来说效果很好。