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New connections created by tcpcheck for are marked as private, making them ineligible for insertion into the server-side connection pool, even when check-reuse-pool is activated. Thus, connection reuse for health checks would only work when the pool had already been populated by regular (non-check) traffic. Change this behavior so that a new check connection is not flagged as private anymore when check-reuse-pool is requested. As a result, on detach, instead of being freed, the connection will be inserted in the idle pool and will be eligible for reuse, both for regular traffic and checks. This change can be useful to ensure that a server idle pool is never completely empty when check-reuse-pool is active. Additionnally, it is also necessary to ensure that check reuse is really effective when connection parameters are different between checks and regular traffic, resulting in a different reuse hash. The previous behavior could be considered as a bug to a certain extents. The current patch should be harmless for default configuration, but it can be a significant improvment for users who want to perform reuse for checks. Thus, it should be backported up to 3.2. |
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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.