6870551a57
A recent patch has introduced a new state for proxies : unpublished backends. Such backends won't be eligilible for traffic, thus use_backend/default_backend rules which target them won't match and content switching rules processing will continue. This patch defines a new frontend keywords 'force-be-switch'. This keyword allows to ignore unpublished or disabled state. Thus, use_backend/default_backend will match even if the target backend is unpublished or disabled. This is useful to be able to test a backend instance before exposing it outside. This new keyword is converted into a persist rule of new type PERSIST_TYPE_BE_SWITCH, stored in persist_rules list proxy member. This is the only persist rule applicable to frontend side. Prior to this commit, pure frontend proxies persist_rules list were always empty. This new features requires adjustment in process_switching_rules(). Now, when a use_backend/default_backend rule matches with an non eligible backend, frontend persist_rules are inspected to detect if a force-be-switch is present so that the backend may be selected.
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.