我通过遵循this Droplet教程来设置Ubuntu EC2实例。在本地开发计算机上，一切似乎都正常运行，但是在EC2实例上收到超时错误（502,504）。
我检查了我的gunicorn日志，并收到[CRITICAL] WORKED TIMEOUT消息，因此我在站点的nginx配置中将gunicorn的“超时”参数增加为300，并将proxy_connect_timeout设置为75s，proxy_read_timeout设置为300s花费的时间远少于此。我认为错误不在于花时间，而是我的nginx或gunicorn配置中有一些配置错误。
从数据库检索数据的GET请求似乎工作正常，但是写入数据库的POST请求似乎无效。
这是我的配置和日志文件
Gunicorn.service
[Unit]
Description=gunicorn daemon
After=network.target
[Service]
User=ubuntu
Group=www-data
WorkingDirectory=/home/ubuntu/standalone_ntp_backend
ExecStart=/home/ubuntu/standalone_ntp_backend/venv/bin/gunicorn --access-logfile - --workers 3 --bind unix:/home/ubuntu/standalone_ntp_backend/standalone_ntp_backend.sock standalone_ntp_backend.wsgi:application --timeout 300
[Install]
WantedBy=multi-user.target
/etc/nginx/sites-available/www.example.com.conf
server {
listen 80;
listen [::]:80;
server_name example.com www.example.com;
location / {
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Host $http_host;
proxy_redirect off;
# include proxy_params;
proxy_connect_timeout 75s;
proxy_read_timeout 300s;
proxy_pass http://unix:/home/ubuntu/standalone_ntp_backend/standalone_ntp_backend.sock;
}
client_max_body_size 50m;
}
/var/log/nginx/error.log
2019/06/14 12:10:40 [error] 1062#1062: *3 upstream timed out (110: Connection timed out) while reading response header from upstream, client: 110.44.xxx.xxx, server: example.com, request: "POST /core/create-trip HTTP/1.1", upstream: "http://unix:/home/ubuntu/standalone_ntp_backend/standalone_ntp_backend.sock/core/create-trip", host: "example.com", referrer: "http://example.com/core/create-trip"
2019/06/14 12:10:58 [error] 1062#1062: *7 upstream prematurely closed connection while reading response header from upstream, client: 110.44.xx.xxx, server: example.com, request: "POST /core/create-trip HTTP/1.1", upstream: "http://unix:/home/ubuntu/standalone_ntp_backend/standalone_ntp_backend.sock:/core/create-trip", host: "example.com", referrer: "http://example.com/core/create-trip"
2019/06/14 12:26:32 [error] 1062#1062: *9 upstream timed out (110: Connection timed out) while reading response header from upstream, client: 110.44.xx.xxx, server: example.com, request: "POST /core/rest-auth/password/reset/ HTTP/1.1", upstream: "http://unix:/home/ubuntu/standalone_ntp_backend/standalone_ntp_backend.sock/core/rest-auth/password/reset/", host: "example.com", referrer: "http://example.com/core/rest-auth/password/reset/"
Gunicorn调试日志
[2019-06-14 12:53:38 +0000] [2229] [DEBUG] Current configuration:
config: None
bind: ['0.0.0.0:8000']
backlog: 2048
workers: 1
worker_class: sync
threads: 1
worker_connections: 1000
max_requests: 0
max_requests_jitter: 0
timeout: 30
graceful_timeout: 30
keepalive: 2
limit_request_line: 4094
limit_request_fields: 100
limit_request_field_size: 8190
reload: False
reload_engine: auto
reload_extra_files: []
spew: False
check_config: False
preload_app: False
sendfile: None
reuse_port: False
chdir: /home/ubuntu/standalone_ntp_backend
daemon: False
raw_env: []
pidfile: None
worker_tmp_dir: None
user: 1000
group: 1000
umask: 0
initgroups: False
tmp_upload_dir: None
secure_scheme_headers: {'X-FORWARDED-PROTOCOL': 'ssl', 'X-FORWARDED-PROTO': 'https', 'X-FORWARDED-SSL': 'on'}
forwarded_allow_ips: ['127.0.0.1']
accesslog: None
disable_redirect_access_to_syslog: False
access_log_format: %(h)s %(l)s %(u)s %(t)s "%(r)s" %(s)s %(b)s "%(f)s" "%(a)s"
errorlog: -
loglevel: DEBUG
capture_output: False
logger_class: gunicorn.glogging.Logger
logconfig: None
logconfig_dict: {}
syslog_addr: udp://localhost:514
syslog: False
syslog_prefix: None
syslog_facility: user
enable_stdio_inheritance: False
statsd_host: None
statsd_prefix:
proc_name: None
default_proc_name: standalone_ntp_backend.wsgi:application
pythonpath: None
paste: None
on_starting: <function OnStarting.on_starting at 0x7f50e62bbf28>
on_reload: <function OnReload.on_reload at 0x7f50e62cd0d0>
when_ready: <function WhenReady.when_ready at 0x7f50e62cd1e0>
pre_fork: <function Prefork.pre_fork at 0x7f50e62cd2f0>
post_fork: <function Postfork.post_fork at 0x7f50e62cd400>
post_worker_init: <function PostWorkerInit.post_worker_init at 0x7f50e62cd510>
worker_int: <function WorkerInt.worker_int at 0x7f50e62cd620>
worker_abort: <function WorkerAbort.worker_abort at 0x7f50e62cd730>
pre_exec: <function PreExec.pre_exec at 0x7f50e62cd840>
pre_request: <function PreRequest.pre_request at 0x7f50e62cd950>
post_request: <function PostRequest.post_request at 0x7f50e62cd9d8>
child_exit: <function ChildExit.child_exit at 0x7f50e62cdae8>
worker_exit: <function WorkerExit.worker_exit at 0x7f50e62cdbf8>
nworkers_changed: <function NumWorkersChanged.nworkers_changed at 0x7f50e62cdd08>
on_exit: <function OnExit.on_exit at 0x7f50e62cde18>
proxy_protocol: False
proxy_allow_ips: ['127.0.0.1']
keyfile: None
certfile: None
ssl_version: 2
cert_reqs: 0
ca_certs: None
suppress_ragged_eofs: True
do_handshake_on_connect: False
ciphers: TLSv1
raw_paste_global_conf: []
[2019-06-14 12:53:38 +0000] [2229] [INFO] Starting gunicorn 19.8.1
[2019-06-14 12:53:38 +0000] [2229] [DEBUG] Arbiter booted
[2019-06-14 12:53:38 +0000] [2229] [INFO] Listening at: http://0.0.0.0:8000 (2229)
[2019-06-14 12:53:38 +0000] [2229] [INFO] Using worker: sync
[2019-06-14 12:53:38 +0000] [2232] [INFO] Booting worker with pid: 2232
[2019-06-14 12:53:38 +0000] [2229] [DEBUG] 1 workers
api_views.py
class CreateTripView(APIView):
def get(self, request):
print("INSIDE GET")
return Response("Hi from GET")
def post(self, request):
print("INSIDE POST")
#logic here(serializer validation and save)
return Response(data)
我已经在上面添加了这些打印语句，以便对以下systemctl gunicorn日志有所帮助：
Jun 14 12:57:23 ip-172-31-41-70 systemd[1]: Started gunicorn daemon.
Jun 14 12:57:23 ip-172-31-41-70 gunicorn[2367]: [2019-06-14 12:57:23 +0000] [2367] [INFO] Starting gunicorn 19.8.1
Jun 14 12:57:23 ip-172-31-41-70 gunicorn[2367]: [2019-06-14 12:57:23 +0000] [2367] [INFO] Listening at: unix:/home/ubuntu/standalone_ntp_backend/standalone_ntp_backend.sock (2367)
Jun 14 12:57:23 ip-172-31-41-70 gunicorn[2367]: [2019-06-14 12:57:23 +0000] [2367] [INFO] Using worker: sync
Jun 14 12:57:23 ip-172-31-41-70 gunicorn[2367]: [2019-06-14 12:57:23 +0000] [2385] [INFO] Booting worker with pid: 2385
Jun 14 12:57:23 ip-172-31-41-70 gunicorn[2367]: [2019-06-14 12:57:23 +0000] [2387] [INFO] Booting worker with pid: 2387
Jun 14 12:57:23 ip-172-31-41-70 gunicorn[2367]: [2019-06-14 12:57:23 +0000] [2388] [INFO] Booting worker with pid: 2388
Jun 14 12:57:24 ip-172-31-41-70 gunicorn[2367]: Loading : /home/ubuntu/standalone_ntp_backend/.env
Jun 14 12:57:24 ip-172-31-41-70 gunicorn[2367]: The .env file has been loaded. See base.py for more information
Jun 14 12:57:24 ip-172-31-41-70 gunicorn[2367]: Loading : /home/ubuntu/standalone_ntp_backend/.env
Jun 14 12:57:24 ip-172-31-41-70 gunicorn[2367]: The .env file has been loaded. See base.py for more information
Jun 14 12:57:24 ip-172-31-41-70 gunicorn[2367]: Loading : /home/ubuntu/standalone_ntp_backend/.env
Jun 14 12:57:24 ip-172-31-41-70 gunicorn[2367]: The .env file has been loaded. See base.py for more information
Jun 14 12:57:36 ip-172-31-41-70 gunicorn[2367]: - - [14/Jun/2019:12:57:36 +0000] "GET /core/view-trip/10 HTTP/1.0" 200 15811 "-" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3626.81 Safari/537.36"
Jun 14 12:57:42 ip-172-31-41-70 gunicorn[2367]: INSIDE GET
Jun 14 12:57:42 ip-172-31-41-70 gunicorn[2367]: - - [14/Jun/2019:12:57:42 +0000] "GET /core/create-trip HTTP/1.0" 200 7204 "-" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3626.81 Safari/537.36"
Jun 14 12:59:24 ip-172-31-41-70 gunicorn[2367]: - - [14/Jun/2019:12:59:24 +0000] "GET / HTTP/1.0" 404 74 "-" "Mozilla/5.0 (compatible; Nimbostratus-Bot/v1.3.2; http://cloudsystemnetworks.com)"
Jun 14 13:02:50 ip-172-31-41-70 gunicorn[2367]: [2019-06-14 13:02:50 +0000] [2367] [CRITICAL] WORKER TIMEOUT (pid:2387)
Jun 14 13:02:50 ip-172-31-41-70 gunicorn[2367]: [2019-06-14 13:02:50 +0000] [2387] [INFO] Worker exiting (pid: 2387)
Jun 14 13:02:50 ip-172-31-41-70 gunicorn[2367]: INSIDE POST
Jun 14 13:02:51 ip-172-31-41-70 gunicorn[2367]: [2019-06-14 13:02:51 +0000] [2402] [INFO] Booting worker with pid: 2402
Jun 14 13:02:51 ip-172-31-41-70 gunicorn[2367]: Loading : /home/ubuntu/standalone_ntp_backend/.env
Jun 14 13:02:51 ip-172-31-41-70 gunicorn[2367]: The .env file has been loaded. See base.py for more information
Jun 14 13:03:24 ip-172-31-41-70 gunicorn[2367]: - - [14/Jun/2019:13:03:24 +0000] "GET /core/rest-auth/password/reset/ HTTP/1.0" 405 7744 "-" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3626.81 Safa
Jun 14 13:07:48 ip-172-31-41-70 gunicorn[2367]: [2019-06-14 13:07:48 +0000] [2367] [CRITICAL] WORKER TIMEOUT (pid:2385)
Jun 14 13:07:48 ip-172-31-41-70 gunicorn[2367]: [2019-06-14 13:07:48 +0000] [2385] [INFO] Worker exiting (pid: 2385)
Jun 14 13:07:48 ip-172-31-41-70 gunicorn[2367]: INSIDE POST
Jun 14 13:07:48 ip-172-31-41-70 gunicorn[2367]: [2019-06-14 13:07:48 +0000] [2409] [INFO] Booting worker with pid: 2409
Jun 14 13:07:48 ip-172-31-41-70 gunicorn[2367]: Loading : /home/ubuntu/standalone_ntp_backend/.env
Jun 14 13:07:48 ip-172-31-41-70 gunicorn[2367]: The .env file has been loaded. See base.py for more information
Jun 14 13:08:32 ip-172-31-41-70 gunicorn[2367]: [2019-06-14 13:08:32 +0000] [2367] [CRITICAL] WORKER TIMEOUT (pid:2402)
Jun 14 13:08:32 ip-172-31-41-70 gunicorn[2367]: [2019-06-14 13:08:32 +0000] [2402] [INFO] Worker exiting (pid: 2402)
Jun 14 13:08:32 ip-172-31-41-70 gunicorn[2367]: [2019-06-14 13:08:32 +0000] [2411] [INFO] Booting worker with pid: 2411
Jun 14 13:08:33 ip-172-31-41-70 gunicorn[2367]: Loading : /home/ubuntu/standalone_ntp_backend/.env
Jun 14 13:08:33 ip-172-31-41-70 gunicorn[2367]: The .env file has been loaded. See base.py for more information
当我将POST请求（json）发送到myendpoint / create-trip时，我收到504网关超时（上面的gunicorn日志），但是对从数据库中检索值的/ view-trip / trip_id端点的GET请求似乎工作正常。
如何配置Nginx和Gunicorn来解决这些超时问题？谢谢。
edit：似乎只有在看到504-网关超时后，api_viewsets.py中的'print（“ Inside POST”）'才会执行。
答案 0 :(得分：0)
结果是我没有在生产服务器中安装RabbitMQ，这导致了所有问题。现在已修复。