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When instantiating a new connection for check, its MUX may be initialized early. This was not performed though if SSL ALPN negotiation will be used, except if check MUX is already fixed. However, this method of initialization is problematic when QUIC MUX is used. Indeed, this multiplexer must only be instantiated after the above application protocol is known, which is derived from the ALPN negotiation. If this is not the case a crash will occur in qmux_init(). In fact, a similar problem was already encountered for normal traffic. Thus, a change was performed in connect_server() : MUX early initialization is now always skipped if SSL ALPN negotiation is active, even if MUX is already fixed. This patch introduces a similar change for checks. Without this patch, it is not possible to perform check on QUIC servers as expected. Indeed, when http-check ruleset is active a crash would occur prior to it.
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.