They aren’t used in parallel. NGINX is a reverse proxy. It’s first in line. It accepts incoming connections and decides where they should go next. It also (usually) serves static media such as CSS, JS and images. It can also do other things such as encryption via SSL, caching etc. Gunicorn is the next layer … Read more
You can start your app with multiple workers or async workers with Gunicorn. Flask server.py from flask import Flask app = Flask(__name__) @app.route(“https://stackoverflow.com/”) def hello(): return “Hello World!” if __name__ == “__main__”: app.run() Gunicorn with gevent async worker gunicorn server:app -k gevent –worker-connections 1000 Gunicorn 1 worker 12 threads: gunicorn server:app -w 1 –threads 12 … Read more
Nginx has some web server functionality (e.g., serving static pages; SSL handling) that gunicorn does not, whereas gunicorn implements WSGI (which nginx does not). … Wait, why do we need two servers? Think of Gunicorn as the application web server that will be running behind nginx – the front- facing web server. Gunicorn is WSGI-compatible. … Read more
I encountered the same warning message. [WARNING] Worker with pid 71 was terminated due to signal 9 I came across this faq, which says that “A common cause of SIGKILL is when OOM killer terminates a process due to low memory condition.” I used dmesg realized that indeed it was killed because it was running … Read more
The answer is in the documentation of gunicorn. http://docs.gunicorn.org/en/latest/configure.html You can specify the config file with .ini or a python script. For example, from the django-skel project “””gunicorn WSGI server configuration.””” from multiprocessing import cpu_count from os import environ def max_workers(): return cpu_count() bind = ‘0.0.0.0:’ + environ.get(‘PORT’, ‘8000’) max_requests = 1000 worker_class=”gevent” workers = … Read more
Thanks to kikicarbonell, I looked into having a volume for my code, and after looking at the Docker Compose recommended Django setup, I added volumes: – .:/code to my web container in docker-compose.yml, and now any code changes I make automatically apply. ## docker-compose.yml: web: restart: always build: . expose: – “8000” links: – postgres:postgres … Read more
You could try upgrading the timeout for your proxy pass in Nginx by adding: proxy_connect_timeout 75s; proxy_read_timeout 300s; on /var/nginx/sites-available/[site-config] or /var/nginx/nginx.conf if you want to increase the timeout limite on all sites served by nginx. You must add –timeout 300 as well to your gunicorn process/config. This solved my problems in the past with … Read more
Try: web: gunicorn –pythonpath app app.wsgi
Create a file wsgi.py under your project with the following contents, then point Gunicorn at it. from my_project import create_app app = create_app() gunicorn -w 4 my_project.wsgi:app # -w 4 specifies four worker processes If you’re using the application factory pattern, Gunicorn allows specifying a function call like my_project:create_app(). For most cases, you can the … Read more
I think you may be confused, Flask is not a web server, it is a framework and needs some sort of web server, such as Gunicorn, Nginx or Apache, to accept HTTP requests which it will then operate on. The reason why people run Nginx and Gunicorn together is that in addition to being a … Read more