Multiple Servers

[Krischan101]

Hi everyone,
I was wondering if running multiple servers simultaneously is possible?

[miguelgrinberg]

Yes. If you use an ASGI or WSGI server you can choose as many workers as you need.

[Krischan101]

I see, but can I assign different port for each server? I checked the examples, but I couldn't find a way to specify the port.

[miguelgrinberg]

A different port for each server? If that's what you want then you can run individual instances, each assigned to the port of your choice. The common thing to do when running multiple workers is to attach all of them to the same port. If you use different ports then you need a load balancer in front to spread the traffic among your workers.

[Krischan101]

for my specific purpose, a load balancer is unnecessary because each server instance is serving different service.

this is how I able to run multiple servers on different port

app1 = Microdot()
app2 = Microdot()
app3 = Microdot()

@app1.route('/')
def home(request):
    return "<h2>Server 1</h2>", 200, {'Content-Type': 'text/html'}

@app2.route('/')
def home(request):
    return "<h2>Server 2</h2>", 200, {'Content-Type': 'text/html'}

@app3.route('/')
def home(request):
    return "<h2>Server 3</h2>", 200, {'Content-Type': 'text/html'}

async def serve():
    server1 = uasyncio.create_task(app1.start_server(port=80))
    server2 = uasyncio.create_task(app2.start_server(port=81))
    server3 = uasyncio.create_task(app3.start_server(port=82))
    await uasyncio.gather(server1, server2, server3)

uasyncio.run(serve())

[miguelgrinberg]

Yes, okay, I did not understand that you wanted to run different servers on different ports. What you are doing is actually correct.