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Why do I get a 110: Connection timed out error, white serving a flask app through nginx and uwsgi?

nginx not able to connect to php-fpm socketuWSGI cannot find “application” using Flask and Virtualenv502 bad gateway nginx. uwsgi, flaskNginx + GUnicorn + Flask + www-data user - file lockdownConfigure basic python 3.5, flask, uwsgi, nginx appNginx and uWSGI Flask app Connection RefusedNginx: use uwsgi_pass with a proxy_pass fallback?Nginx cannot see unix socketFastCGI: Access deniednginx (13: Permission denied) on socket

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0

I am trying to serve a flask application using nginx and uwsgi, through an ubuntu docker container, while the host is also an ubuntu 18.04 OS.

This is the conf file for the nginx server, for which I have created a symbolic link in /etc/nginx/sites-enabled:

server 
 listen 1611;
 real_ip_header X-Forwarded-For;
 set_real_ip_from 127.0.0.1;
 server_name localhost;

 location / 
 include uwsgi_params;
 uwsgi_pass unix:/var/www/html/step_service/socket.sock;
 uwsgi_modifier1 30; 
 

The `uwsgi.ini' file is as follows:

[uwsgi]
base=/var/www/html/step_service
app=app
module=%(app)
callable = app

home=%(base)/venv
pythonpath=%(base)
socket=%(base)/socket.sock
chmod-socket=777

master=true
processes=5
threads=5
die-on-term=true
autostart=true
autorestart=true
harakiri=30
logto=/var/www/html/step_service/log/%n.log

The logs of uwsgi seem to indicate success:

 * Serving Flask app "app" (lazy loading)
 * Environment: production
 WARNING: Do not use the development server in a production environment.
 Use a production WSGI server instead.
 * Debug mode: off
 * Running on http://0.0.0.0:5000/ (Press CTRL+C to quit)

The logs of nginx server (in particular error.log) is:

2019/04/18 16:23:30 [error] 6729#6729: *1 upstream timed out (110: Connection timed out) while reading response header from upstream, client: 172.17.0.1, server: localhost, request: "GET /rec/1/1 HTTP/1.1
", upstream: "uwsgi://unix:/var/www/html/step_service/socket.sock", host: "172.17.0.2:1611"

Any ideas would be more than welcome!

nginx docker uwsgi flask

share|improve this question

asked Apr 18 at 16:31

Dimitris PoulopoulosDimitris Poulopoulos

1

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  Did you use the right uwsgi.ini? Your app is listening on TCP port 5000, not on the Unix socket specified. You should also heed the warning about using a production uwsgi server. And the nginx server on port 1611 is utterly redundant. Just have your uwsgi server listen on that port if you want it there.
  
  – Michael Hampton♦
  Apr 18 at 16:59
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  The warning comes from Flask, and that's why I'm using wsgi with nginx. But how should I specify a socket that listens to port 5000?
  
  – Dimitris Poulopoulos
  Apr 18 at 17:27
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  uwsgi-docs.readthedocs.io/en/latest/Configuration.html It's the very first example...
  
  – Michael Hampton♦
  Apr 18 at 17:30
  

  
  
  
  

add a comment | 

0

I am trying to serve a flask application using nginx and uwsgi, through an ubuntu docker container, while the host is also an ubuntu 18.04 OS.

This is the conf file for the nginx server, for which I have created a symbolic link in /etc/nginx/sites-enabled:

server 
 listen 1611;
 real_ip_header X-Forwarded-For;
 set_real_ip_from 127.0.0.1;
 server_name localhost;

 location / 
 include uwsgi_params;
 uwsgi_pass unix:/var/www/html/step_service/socket.sock;
 uwsgi_modifier1 30; 
 

The `uwsgi.ini' file is as follows:

[uwsgi]
base=/var/www/html/step_service
app=app
module=%(app)
callable = app

home=%(base)/venv
pythonpath=%(base)
socket=%(base)/socket.sock
chmod-socket=777

master=true
processes=5
threads=5
die-on-term=true
autostart=true
autorestart=true
harakiri=30
logto=/var/www/html/step_service/log/%n.log

The logs of uwsgi seem to indicate success:

 * Serving Flask app "app" (lazy loading)
 * Environment: production
 WARNING: Do not use the development server in a production environment.
 Use a production WSGI server instead.
 * Debug mode: off
 * Running on http://0.0.0.0:5000/ (Press CTRL+C to quit)

The logs of nginx server (in particular error.log) is:

2019/04/18 16:23:30 [error] 6729#6729: *1 upstream timed out (110: Connection timed out) while reading response header from upstream, client: 172.17.0.1, server: localhost, request: "GET /rec/1/1 HTTP/1.1
", upstream: "uwsgi://unix:/var/www/html/step_service/socket.sock", host: "172.17.0.2:1611"

Any ideas would be more than welcome!

nginx docker uwsgi flask

share|improve this question

asked Apr 18 at 16:31

Dimitris PoulopoulosDimitris Poulopoulos

1

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  Did you use the right uwsgi.ini? Your app is listening on TCP port 5000, not on the Unix socket specified. You should also heed the warning about using a production uwsgi server. And the nginx server on port 1611 is utterly redundant. Just have your uwsgi server listen on that port if you want it there.
  
  – Michael Hampton♦
  Apr 18 at 16:59
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  The warning comes from Flask, and that's why I'm using wsgi with nginx. But how should I specify a socket that listens to port 5000?
  
  – Dimitris Poulopoulos
  Apr 18 at 17:27
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  uwsgi-docs.readthedocs.io/en/latest/Configuration.html It's the very first example...
  
  – Michael Hampton♦
  Apr 18 at 17:30
  

  
  
  
  

add a comment | 

I am trying to serve a flask application using nginx and uwsgi, through an ubuntu docker container, while the host is also an ubuntu 18.04 OS.

This is the conf file for the nginx server, for which I have created a symbolic link in /etc/nginx/sites-enabled:

server 
 listen 1611;
 real_ip_header X-Forwarded-For;
 set_real_ip_from 127.0.0.1;
 server_name localhost;

 location / 
 include uwsgi_params;
 uwsgi_pass unix:/var/www/html/step_service/socket.sock;
 uwsgi_modifier1 30; 
 

The `uwsgi.ini' file is as follows:

[uwsgi]
base=/var/www/html/step_service
app=app
module=%(app)
callable = app

home=%(base)/venv
pythonpath=%(base)
socket=%(base)/socket.sock
chmod-socket=777

master=true
processes=5
threads=5
die-on-term=true
autostart=true
autorestart=true
harakiri=30
logto=/var/www/html/step_service/log/%n.log

The logs of uwsgi seem to indicate success:

 * Serving Flask app "app" (lazy loading)
 * Environment: production
 WARNING: Do not use the development server in a production environment.
 Use a production WSGI server instead.
 * Debug mode: off
 * Running on http://0.0.0.0:5000/ (Press CTRL+C to quit)

The logs of nginx server (in particular error.log) is:

2019/04/18 16:23:30 [error] 6729#6729: *1 upstream timed out (110: Connection timed out) while reading response header from upstream, client: 172.17.0.1, server: localhost, request: "GET /rec/1/1 HTTP/1.1
", upstream: "uwsgi://unix:/var/www/html/step_service/socket.sock", host: "172.17.0.2:1611"

Any ideas would be more than welcome!

nginx docker uwsgi flask

share|improve this question

asked Apr 18 at 16:31

Dimitris PoulopoulosDimitris Poulopoulos

1

server 
 listen 1611;
 real_ip_header X-Forwarded-For;
 set_real_ip_from 127.0.0.1;
 server_name localhost;

 location / 
 include uwsgi_params;
 uwsgi_pass unix:/var/www/html/step_service/socket.sock;
 uwsgi_modifier1 30; 
 

[uwsgi]
base=/var/www/html/step_service
app=app
module=%(app)
callable = app

home=%(base)/venv
pythonpath=%(base)
socket=%(base)/socket.sock
chmod-socket=777

master=true
processes=5
threads=5
die-on-term=true
autostart=true
autorestart=true
harakiri=30
logto=/var/www/html/step_service/log/%n.log

 * Serving Flask app "app" (lazy loading)
 * Environment: production
 WARNING: Do not use the development server in a production environment.
 Use a production WSGI server instead.
 * Debug mode: off
 * Running on http://0.0.0.0:5000/ (Press CTRL+C to quit)

2019/04/18 16:23:30 [error] 6729#6729: *1 upstream timed out (110: Connection timed out) while reading response header from upstream, client: 172.17.0.1, server: localhost, request: "GET /rec/1/1 HTTP/1.1
", upstream: "uwsgi://unix:/var/www/html/step_service/socket.sock", host: "172.17.0.2:1611"

share|improve this question

asked Apr 18 at 16:31

Dimitris PoulopoulosDimitris Poulopoulos

1

share|improve this question

asked Apr 18 at 16:31

Dimitris PoulopoulosDimitris Poulopoulos

1

asked Apr 18 at 16:31

Dimitris PoulopoulosDimitris Poulopoulos

1

asked Apr 18 at 16:31

Dimitris PoulopoulosDimitris Poulopoulos

1