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As reported in issue #511, when sending an outgoing local connection (e.g. health check) we must set the "local" tag and not a "proxy" tag. The issue comes from historic support on v1 which required to steal the address on the outgoing connection for such ones, creating confusion in the v2 code which believes it sees the incoming connection. In order not to risk to break existing setups which might rely on seeing the LB's address in the connection's source field, let's just change the connection type from proxy to local and keep the addresses. The protocol spec states that for local, the addresses must be ignored anyway. This problem has always existed, this can be backported as far as 1.5, though it's probably not a good idea to change such setups, thus maybe 2.0 would be more reasonable.
The HAProxy documentation has been split into a number of different files for ease of use. Please refer to the following files depending on what you're looking for : - INSTALL for instructions on how to build and install HAProxy - BRANCHES to understand the project's life cycle and what version to use - LICENSE for the project's license - CONTRIBUTING for the process to follow to submit contributions The more detailed documentation is located into the doc/ directory : - doc/intro.txt for a quick introduction on HAProxy - doc/configuration.txt for the configuration's reference manual - doc/lua.txt for the Lua's reference manual - doc/SPOE.txt for how to use the SPOE engine - doc/network-namespaces.txt for how to use network namespaces under Linux - doc/management.txt for the management guide - doc/regression-testing.txt for how to use the regression testing suite - doc/peers.txt for the peers protocol reference - doc/coding-style.txt for how to adopt HAProxy's coding style - doc/internals for developer-specific documentation (not all up to date)