Can not forward X-Real-IP

[truongnd]

I make simple app receive request from client and get X-Real-IP. But it empty
My code:

from http.server import BaseHTTPRequestHandler, HTTPServer

class Handler(BaseHTTPRequestHandler):
def do_GET(self):
real_ip = self.headers.get('X-Real-IP', 'N/A')
forwarded_for = self.headers.get('X-Forwarded-For', 'N/A')

    print(f"X-Real-IP: {real_ip}, X-Forwarded-For: {forwarded_for}")

    self.send_response(200)
    self.end_headers()
    self.wfile.write(f"X-Real-IP: {real_ip}\nX-Forwarded-For: {forwarded_for}\n".encode())

server = HTTPServer(('0.0.0.0', 8080), Handler)
print("Listening on port 8080...")
server.serve_forever()

Ingress:

apiVersion: v1
kind: Service
metadata:
name: ubuntu-service
namespace: default
spec:
selector:
run: ubuntu
ports:
- port: 80
targetPort: 8080

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
name: test-ingress
namespace: default
spec:
ingressClassName: caddy
rules:

• host: logis.seedcom.vn
  http:
  paths:
  • backend:
    service:
    name: ubuntu-service
    port:
    number: 80
    path: /testingress
    pathType: Prefix

Result:

Listening on port 8080...
X-Real-IP: N/A, X-Forwarded-For: 10.1.6.3
10.1.119.218 - - [04/Jul/2025 07:49:16] "GET /testingress HTTP/1.1" 200 -

How can i forward request headers by caddy ingress?