709cde6d08
Since haproxy 3.1, the master-worker mode changed to let the worker parse the configuration instead of the master. Previously, signals were blocked during configuration parsing and unblocked before entering the polling loop of the master. This way it was impossible to start a reload during the configuration parsing. But with the new model, the polling loop is started in the master before the configuration parsing is finished, and the signals are still unblocked at this step. Meaning that it is possible to start a reload while the configuration is parsing. This patch reintroduce the behavior of blocking the signals during configuration parsing adapted to the new model: - Before the exec() of the reload, signals are blocked. - When entering the polling loop, the SIGCHLD is unblocked because it is required to get a failure during configuration parsing in the worker - Once the configuration is parsed, upon success in _send_status() or upon failure in run_master_in_recovery_mode() every signals are unblocked. This patch must be backported as far as 3.1. |
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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.