848e0cd052
Defaults proxies instance are stored in a global name tree. When there is a name conflict and the older entry cannot be simply discarded as it is already referenced, the older entry is instead removed from the name tree and inserted into the orphaned list. The purpose of the orphaned list was to guarantee that any remaining unreferenced defaults are purged either on postparsing or deinit. However, this is in fact completely useless. Indeed on postparsing, orphaned entries are always referenced. On deinit instead, defaults are already freed along the cleanup of all frontend/backend instances clean up, thanks to their refcounting. This patch streamlines this by removing orphaned list. Instead, a defaults section is inserted into a new global defaults_list during their whole lifetime. This is not strictly necessary but it ensures that defaults instances can still be accessed easily in the future if needed even if not present in the name tree. On deinit, a BUG_ON() is added to ensure that defaults_list is indeed emptied. Another benefit from this patch is to simplify the defaults deletion procedure. Orphaned simple list is replaced by a proper double linked list implementation, so a single LIST_DELETE() is now performed. This will be notably useful as defaults may be removed at runtime in the future if backends deletion at runtime is implemented. |
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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.