How to close client connection when Nginx's upstream server close conncetion? - nginx

Question

(1) I have an http server， listen port 8080, which sleep 5 second when handle GET request:
class myHandler(BaseHTTPRequestHandler):
def do_GET(self):
self.send_response(200)
self.send_header('Content-type','text/html')
self.end_headers()
self.wfile.write("Hello World !")
time.sleep(5)
print 'after sleep'
return
try:
server = HTTPServer(('', 8080), myHandler)
server.serve_forever()
except KeyboardInterrupt:
server.socket.close()
(2) I have a nginx, listen 1014 and forward request to 8080,
upstream kubeapiserver {
server 127.0.0.1:8080;
keepalive 30;
}
server {
listen 1014;
server_name 127.0.0.1;
location / {
proxy_pass http://kubeapiserver;
proxy_http_version 1.1;
proxy_connect_timeout 1800s;
proxy_read_timeout 1800s;
proxy_send_timeout 1800s;
}
}
(3) make a long request to 1014
import time
url="http://127.0.0.1:1014"
s = requests.Session()
r = s.get(url)
print r.headers
print r.status_code
print r.content
while True:
time.sleep(10)
AND I FOUND with netstat -nap | egrep "(8080)|(1014)" that:
when the B connection close, the A connection STILL ESTABLISHED
How to close client connection when Nginx's upstream server close conncetion ? How to config?