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nginxamazon-ec2flaskuwsgiupstart

uwsgi upstart on amazon linux

I created a uwsgi file following this tutorial https://uwsgi.readthedocs.org/en/latest/Upstart.html on amazon linux. Though It doesn't seem to run as Nginx just says bad gateway. If I run the

/etc/init/uwsgi.conf

description "uwsgi tiny instance"
start on runlevel [2345]
stop on runlevel [06]

exec /home/ec2-user/venv/bin/uwsgi --ini /home/ec2-user/uwsgi-prod_demo.ini

if I do run the following in shell, then python application runs. 

/home/ec2-user/venv/bin/uwsgi --ini /home/ec2-user/uwsgi-prod_demo.ini

uwsgi-prod_demo.ini

[uwsgi]
socket = :8080
chdir = /home/ec2-user/prod_demo
master = True
venv = /home/ec2-user/venv
callable = app
wsgi-file = /home/ec2-user/prod_demo/manage.py
enable-threads = True
https = =0,/home/ec2-user/xxx.com.au.pem,/home/ec2-user/newkey.pem,HIGH

nginx.conf

user  ec2-user;
worker_processes  1;

error_log  /var/log/nginx/error.log;
#error_log  /var/log/nginx/error.log  notice;
#error_log  /var/log/nginx/error.log  info;

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  0;
    keepalive_timeout  65;

    #gzip  on;

    # 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;
    listen 443 ssl;
    ssl_certificate /home/ec2-user/xxx.com.au.pem;
    ssl_certificate_key /home/ec2-user/newkey.pem;
    server_name import.xxx.com.au  *.import.xxx.com.au;
    access_log /var/log/prod_demo/access_log;

    root /home/ec2-user/prod_demo;

    location / {
      uwsgi_pass 127.0.0.1:8080;
      include uwsgi_params;
    }

    location /static {
         alias /home/ec2-user/prod_demo/app/static;
    }

    location = /favicon.ico {
            alias    /home/ec2-user/prod_demo/app/static/images/favicon.ico;
    }
  }
}
Solution

  • To fix this I did a few things. - Moved all scripts from the home directory to an /var/www/ - created an www group and www user and chown /var/www to www:www

    Full Instructions

    1. Create a user and group www and www

      sudo groupadd www
sudo adduser www -g www

    2. create a dir where your flask application will be ie /var/www/

      sudo chown -R www:www /var/www

    3. /etc/nginx/nginx.conf

      # /etc/nginx/nginx.conf

# For more information on configuration, see:
#   * Official English Documentation: http://nginx.org/en/docs/
#   * Official Russian Documentation: http://nginx.org/ru/docs/

user  www;
worker_processes  1;

error_log  /var/log/nginx/error.log;
#error_log  /var/log/nginx/error.log  notice;
#error_log  /var/log/nginx/error.log  info;

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;
    client_max_body_size 20M;

    #keepalive_timeout  0;
    keepalive_timeout  0;

    uwsgi_read_timeout 86400;
    uwsgi_send_timeout 86400;

    #gzip  on;

    # 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;
    listen 443 ssl;
    ssl_certificate /var/www/test.com.au.pem;
    ssl_certificate_key /var/www/newkey.pem;
    server_name demo.test.com.au;
    access_log /var/log/prod_demo/access_log;

    root /var/www/prod_demo;

    location / {
      uwsgi_pass 127.0.0.1:28080;
      include uwsgi_params;
    }

    location /static {
         alias /var/www/prod_demo/app/static;
    }

    location = /favicon.ico {
            alias    /var/www/prod_demo/app/static/images/favicon.ico;
    }
  }

  server {
    listen 80;
    listen 443 ssl;
    ssl_certificate /var/www/test.com.au.pem;
    ssl_certificate_key /var/www/newkey.pem;
    server_name ajtravel.test.com.au;
    access_log /var/log/prod_demo_two/access_log;

    root /var/www/prod_demo_two;

    location / {
      uwsgi_pass 127.0.0.1:28082;
      include uwsgi_params;
    }

    location /static {
         alias /var/www/prod_demo_two/app/static;
    }

    location = /favicon.ico {
            alias    /var/www/prod_demo_two/app/static/images/favicon.ico;
    }
  }

   #test config

  server {
    listen 80;
    listen 443 ssl;
    ssl_certificate /var/www/test.com.au.pem;
    ssl_certificate_key /var/www/newkey.pem;
    server_name demo.test.test.com.au;
    access_log /var/log/prod_demo/access_log;

    root /var/www/prod_demo;

    location / {
      uwsgi_pass 127.0.0.1:28080;
      include uwsgi_params;
    }

    location /static {
         alias /var/www/prod_demo/app/static;
    }

    location = /favicon.ico {
            alias    /var/www/prod_demo/app/static/images/favicon.ico;
    }
  }

  server {
    listen 80;
    listen 443 ssl;
    ssl_certificate /var/www/test.com.au.pem;
    ssl_certificate_key /var/www/newkey.pem;
    server_name ajtravel.test.test.com.au;
    access_log /var/log/prod_demo_two/access_log;

    root /var/www/prod_demo_two;

    location / {
      uwsgi_pass 127.0.0.1:28082;
      include uwsgi_params;
    }

    location /static {
         alias /var/www/prod_demo_two/app/static;
    }

    location = /favicon.ico {
            alias    /var/www/prod_demo_two/app/static/images/favicon.ico;
    }
  }
}

    4. /etc/init/uwsgi-prod-demo.conf

      # https://uwsgi.readthedocs.org/en/latest/Upstart.html
# /etc/init/uwsgi.conf
# simple uWSGI script

description "uwsgi tiny instance"
#start on runlevel [2345]
#stop on runlevel [06]

start on started elastic-network-interfaces

exec /var/www/venv/bin/uwsgi --ini /var/www/uwsgi-prod_demo.ini

    5. /var/www/uwsgi-prod_demo.ini

      [uwsgi]
uid = www
gid = www
socket = :28080
chdir = /var/www/prod_demo
master = True
venv = /var/www/venv
callable = app
wsgi-file = /var/www/prod_demo/manage.py
enable-threads = True