81dbc2c2e2
Before refactoring the master-worker mode, in all runtime modes, when the new process successfully parsed its configuration and bound to sockets, it sent either SIGUSR1 or SIGTERM to the previous one in order to terminate it. Let's keep this logic as is for the standalone mode. In addition, in standalone mode we need to send the signal to old process before calling set_identity(), because in set_identity() effective user or group may change. So, the order is important here. In case of master-worker mode after refactoring, master terminates the previous worker by itself up to receiving "READY" status from the new one in _send_status(). Master also sets at this moment HAPROXY_LOAD_SUCCESS env variable and checks, if there are some other workers to terminate with max_reloads exceeded. So, now in master-worker mode we terminate old workers only, when the new one has successfully done all initialization steps and has sent "READY" status to master.
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.