Florian, I don't know anything about Swarm's load balancer, but the most common load balancers create TCP connections to backend servers as needed, and are able to route different incoming requests to different backend servers as long as the client is using HTTP (or other layer 7 protocol the load balancer has awareness of). If a load balancer does not understand the protocol, basic TCP routing is possible but then the routing is pinned to a single backend server until the connection is terminated by the client or backend. ZeroMQ doesn't work well with such common load balancers for a couple of reasons: 1) I'm not aware of any load balancers that understand the ZeroMQ protocol, so you can only use TCP routing.2) TCP routing pins to a specific backend which means you lose out on actual load balancing. Instead, you should use ZeroMQ's built-in load balancing capability. There are two ways to do this: 1) Build a ZeroMQ broker node. Create a process that binds two ZeroMQ sockets, one for receiving work, and one for sending work. Configure your nodes to connect to the broker. As you add or remove client or server nodes, routing should work automatically. 2) Go brokerless. A ZeroMQ socket can connect to more than one peer, so have each client node connect to all of the server nodes directly. If the number of nodes in your cluster changes, then reconfigure the client nodes to add or remove ZeroMQ connections. Justin
On Sun, Jun 25, 2017, at 01:51 PM, picfl...@web.de wrote: > Hi, > > a few days ago I posted a question here regarding the combination of > Zeromq and Docker Swarm.> > As a follow up to this thread. Since it is not possible to really use > a stateful connections with the load balancer provided by Docker > Swarm, I am curious if it is possible to write distributed > architectures with entirely stateless protocols?> > Thanks, > > Florian > _________________________________________________ > zeromq-dev mailing list > zeromq-dev@lists.zeromq.org > https://lists.zeromq.org/mailman/listinfo/zeromq-dev
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