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QUIC relies on several advanced network API features from the kernel to perform optimally. Checks are performed during startup to ensure that these features are supported. A fallback is automatically performed for every incompatible feature. Besides the automatic fallback mechanism, a message is also reported to the user at the same time. Previously, alert level was used, but it is incorrect as it is reserved for unrecoverable errors which should prevent haproxy to start. Warning level could be used, but this can annoy users running with zero-warning mode. This patch removes the alert message when 'socket-owner connection' mode cannot be activated. Convert the message to a diag level. This allows users to start without forcing configuration modification to hide a warning. Besides, several feature fallback such as the polling mechanism does not emit any warning either, so it's better to adopt a similar behavior for QUIC features. This must be backported up to 2.8.
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.