pythonlinuxzeromq

How to control the source IP address of a ZeroMQ packet on a machine with multiple IPs?

The Python standard library's socket.create_connection()method has a source address option, for controlling which source IP a connection uses.

How do I do the same thing with a Python ZeroMQ socket, given a machine that has multiple addresses?

In this case, I've been using Linux's iproute2 ip addr add to create the addresses and the ZeroMQ PUB/SUB socket-archetypes.

Solution

  • When trying to .connect() to a remote, I found the answer in the protocol documentation, put the source ip before a semicolon in the connect string:

    rc = zmq_connect(socket, "tcp://192.168.1.17:5555;192.168.1.1:5555")

    In Python, this looks like:

    socket = zmq.Context().socket(zmq.SUB)
socket.connect('tcp://192.168.1.17:5555;192.168.1.1:5555')