687df405fe
Over their lifetime, connections are attached to different list. These lists depends on whether connection is on frontend or backend side. Attach point members are stored via a union in struct connection. The next commit reorganizes them so that a proper frontend/backend separation is performed : commit a96f1286a75246fef6db3e615fabdef1de927d83 BUG/MINOR: connection: rearrange union list members On conn_free(), connection instance must be removed from these lists to ensure there is no use-after-free case. However code was still shaky there, despite no real issue. Indeed, <toremove_list> was detached for all connections, despite being only used on backend side only. This patch streamlines the freeing of connection. Now, <toremove_list> detach is performed in conn_backend_deinit(). Moreover, a new helper conn_frontend_deinit() is defined. It ensures that <stopping_list> detach is done. Prior it was performed individually by muxes. Note that a similar procedure is performed when the connection is reversed. Hence, conn_frontend_deinit() is now used here as well, rendering reversal from FE to BE or vice versa symmetrical. As mentionned above, no crash occured prior to this patch, but the code was fragile, in particular access to <toremove_list> for frontend connections. Thus this patch is considered as a bug fix worthy of a backport along with above mentionned patch, currently up to 3.0.
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.