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If no specific check settings are defined on a server line, it is expected that these checks will be performed with the same parameters as normal connections on the same server. ALPN must be carefully taken into account for checks. Most notably, MUX initialization is delayed so that it is performed only after SSL handshake. Prior to this patch, MUX init delay was only performed if ALPN was defined via check settings. Thus, with the following settings, checks would be performed on HTTP/1.1 without consulting ALPN negotiation result from the server : server s1 127.0.0.1:443 ssl crt <...> alpn h2 check This bug may result in checks reporting failure, for example in case of a server answering HTTP/2 to ALPN negotiation to the configuration above. Besides, there is incoherency between normal and check connections, which is not what the documentation specifies. This patch fixes this code. Now server parameters are also taken into account. This ensures that checks and normal connections by default use the same connection method. This must be backported up to 2.4.
HAProxy
HAProxy is a free, very fast and reliable reverse-proxy offering high availability, load balancing, and proxying for TCP and HTTP-based applications.
Installation
The INSTALL file describes how to build HAProxy. A list of packages is also available on the wiki.
Getting help
The discourse and the mailing-list are available for questions or configuration assistance. You can also use the slack or IRC channel. Please don't use the issue tracker for these.
The issue tracker is only for bug reports or feature requests.
Documentation
The HAProxy documentation has been split into a number of different files for ease of use. It is available in text format as well as HTML. The wiki is also meant to replace the old architecture guide.
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)
License
HAProxy is licensed under GPL 2 or any later version, the headers under LGPL 2.1. See the LICENSE file for a more detailed explanation.