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In SMTP, MySQL and PgSQL checks, we're supposed to finish with a message to politely quit the server, otherwise some of them will log some errors. This is the case with Postfix as reported in GH issue #187. Since commit fe4abe6 ("BUG/MEDIUM: connections: Don't call shutdown() if we want to disable linger.") we are a bit more aggressive on outgoing connection closure and checks were not prepared for this. This patch makes the 3 checks above disable the linger_risk for these checks so that we close cleanly, with the side effect that it will leave some TIME_WAIT connections behind (hence why it should not be generalized to all checks). It's worth noting that in issue #187 it's mentioned that this patch doesn't seem to be sufficient for Postfix, however based only on local network activity this looks OK, so maybe this will need to be improved later. Given that the patch above was backported to 2.0 and 1.9, this one should as well.
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)