a0d727e069
Before refactoring master-worker architecture, resources to setup master CLI for the new worker process (shared sockpair, entry in proc_list) were created in init() before parsing the configuration and binding listening sockets. So, master during its re-exec has had to cleanup the new worker's ressources in a case, when it fails at some initialization step before the fork. Now fork happens very early and worker parses its configuration by itself. If it fails during the initialization stage, all clean ups (deleting the fds of the shared sockpair, proc_list cleanup) are performed in SIGCHLD handler up to catching the SIGCHLD corresponded to this new worker. So, there is no longer need to call mworker_cleanup_proc() in mworker_reexec(). As for mworker_cleanlisteners(), there is no longer need to call this function. Master parses now only "global" and "program" sections, so it allocates only MASTER proxy, which is stopped in mworker_reexec() by mworker_cli_proxy_stop(). Let's keep the definitions of mworker_cleanlisteners() and mworker_cleanup_proc() in mworker.c for the moment. We may reuse parts of its code later. |
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| INSTALL | ||
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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.