f3127df74d
Implement refcount notion into proxy structure. The objective is to be able to increment refcount on proxy to prevent its deletion temporarily. This is similar to the server refcount : "del backend" is not blocked and will remove the targetted instance from the global proxies_list. However, the final free operation is delayed until the refcount is null. As stated above, the API is similar to servers. Proxies are initialized with a refcount of 1. Refcount can be incremented via proxy_take(). When no longer useful, refcount is decremented via proxy_drop() which replaces the older free_proxy(). Deinit is only performed once refcount is null. This commit also defines flag PR_FL_DELETED. It is set when a proxy instance has been removed via a "del backend" CLI command. This should serve as indication to modules which may still have a refcount on the target proxy so that they can release it as soon as possible. Note that this new refcount is completely ignored for a default proxy instance. For them, proxy_take() is pure noop. Free is immediately performed on first proxy_drop() invokation.
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.