8dd4efe42f
This refactoring allows to simplify 'master-worker' logic. The master process with this change will fork a worker very early at the initialization stage, which allows to perform a configuration parsing only for the worker. In reality only the worker process needs to parse and to apply the whole configuration. Master process just polls master CLI sockets, watches worker status, catches its termination state and handles the signals. With this refactoring there is no longer need for master to perform re-execution after reading the whole configuration file to free additional memory. And there is no longer need for worker to register atexit callbacks, in order to free the memory, when it fails to apply the new configuration. In contrast, we now need to set proc_self pointer to the new worker entry in processes list just after the fork in the worker process context. proc_self is dereferenced in mworker_sockpair_register_per_thread(), which is called when worker enters in its polling loop. Following patches will try to gather more 'worker' and 'master' specific' code in the dedicated cases of this new fork() switch, or in a separate functions. |
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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.