Flask - Common Application Deployment Solutions
Introduction During development and debugging, Flask applications are typically run directly using app.run(). However, the built-in WSGI server in Flask is not known for high performance. For production environments, gunicorn is commonly used. For legacy projects that don’t require high performance and rely heavily on in-process shared variables, using gunicorn might affect inter-request communication, so you may consider using gevent directly. Before Docker became popular, Flask applications in production were typically deployed using virtualenv + gunicorn + supervisor. After Docker gained widespread adoption, the deployment approach shifted to gunicorn + Docker. Without container orchestration services, a reverse proxy like nginx is typically placed in front of the backend services. When using Kubernetes, services are typically exposed via Service + Ingress (or Istio, etc.). ...