Greetings, On 7/10/16 6:33 AM, Matt Esch wrote: > I need to load balance a custom tcp protocol and wonder if HAProxy > could be configured or extended for my use case. > > The protocol is a multiplexed frame-based protocol. An incoming socket > can send frames in arbitrary order. The first 2 bytes dictate the > frame length entirely (so max 64k per frame). The frame has a type and > a header format, followed by a payload. > > The multiplexing works by assigning long ids in the frame header and > pairing the responses based on this id.
Depending on what the id's actually look like this may or may not work, but before I started writing a lot of C I'd try something such as payload() per https://cbonte.github.io/haproxy-dconv/configuration-1.5.html#7.1.5 to match an acl for use_backend; or stick on (using a table) via https://cbonte.github.io/haproxy-dconv/configuration-1.5.html#stick%20on. Again, entirely possible that its not usable for your use-case, but if it is it sounds much easier than trying to code another format. - Chad > > A load balancer would read frames from the socket, parse the frame, > select the correct backend from a header and route the request through > an available backend peer. The response would be matched to the > incoming socket based on the frame id. > > I expect (a lot of) c code will need to be written to support such a > custom protocol. I'm looking for specific pointers about how to add > such a protocol to the existing codebase in a way that would fit > cleanly, and preferably in a modular fashion. > > Any hints appreciated > > > ~Matt > >
