Support ipv6 ?

[wusanye]

Enterprise gateway support remote kernel, but remote machine may be ipv6-configured.

I found that jupyter_client‘s KernelManager and ipykernel's IPKernelApp does't support ipv6.

Specifically, zmq context is not ipv6 enabled,

context.setsockopt(zmq.IPV6, 1)

So, can we turn on this option default?

I have tested some case, and found that we can turn on this option because it support both ipv4 and ipv6.

Test Report

Environment

python = 3.7.4

pyzmq = 21.0.1

Test

pub_server.py

import zmq
import random
import sys
import time

port = "5556"
ip = sys.argv[1]

context = zmq.Context()
context.setsockopt(zmq.IPV6, 1)
socket = context.socket(zmq.PUB)

socket.bind("tcp://%s:%s" % (ip, port))

while True:
    topic = random.randrange(9999, 10005)
    messagedata = random.randrange(1, 215) - 80
    print("%d %d" % (topic, messagedata))
    socket.send(b"%d %d" % (topic, messagedata))
    time.sleep(1)

sub_client.py

import sys
import zmq

port = "5556"
ip = sys.argv[1]

# Socket to talk to server
context = zmq.Context()
context.setsockopt(zmq.IPV6, 1)
socket = context.socket(zmq.SUB)

print("Collecting updates from weather server...")
socket.connect("tcp://%s:%s" % (ip, port))

# Subscribe to zipcode, default is NYC, 10001
topic_filter = "10001"
socket.setsockopt_string(zmq.SUBSCRIBE, topic_filter)

# Process 5 updates
total_value = 0
for update_nbr in range(5):
    string = socket.recv()
    print(string)
    topic, message_data = string.split()
    total_value += int(message_data)
    print(topic, message_data)

print("Average message_data value for topic '%s' was %dF" % (topic_filter, total_value / update_nbr))

1. server ipv6, client ipv6, works!

python pub_server.py fdbd:dc02:13:414::72
python sub_client.py fdbd:dc02:13:414::72

2. server ipv6 with [], client ipv6 with [], works!

python pub_server.py [fdbd:dc02:13:414::72]
python sub_client.py [fdbd:dc02:13:414::72]

3. server ipv6 with [], client ipv6, works!

python pub_server.py [fdbd:dc02:13:414::72]
python sub_client.py fdbd:dc02:13:414::72

4. server ipv6 = INADDR6_ANY, client ipv6, works!

python pub_server.py ::
python sub_client.py fdbd:dc02:13:414::72

5. server ipv6 = INADDR6_ANY, client ipv4, works!

python pub_server.py ::
python sub_client.py 10.144.119.72

[suryag10]

Yes, we had tested the same and is working. Will post the POC we had done.