ec74438273
As discussed in GH #2814, there is an ambiguity in hlua implementation that causes haproxy smp boolean type to be pushed as an integer on the Lua stack. On the other hand, when doing Lua to haproxy smp conversion, the boolean type is properly perserved. Of course this situation is not desirable and can lead to unexpected results. However we cannot simply fix the behavior because in Lua boolean and integer types are not are completely distinct types and cannot be used interchangeably. So in order to prevent breaking existing scripts logic, in this patch we add a dedicated lua tunable named "tune.lua.smp-preserve-bool" which can take the following values: - "on" : when converting haproxy smp to lua, boolean type is preserved - "off": when converting haproxy smp to lua, boolean is converted to integer (legacy behavior) For now, the tunable defaults to "off" to preserve historical behavior. However, when the option isn't set explicitly and lua is used, a warning will be emitted in order to raise user's awareness about this ambiguity. It is expected that the tunable could default to "on" in future versions, thus it is recommended to avoid setting it to "off" except when using existing Lua scripts that still rely on the old behavior regarding boolean smp to Lua conversion, and that they cannot be fixed easily. This should solve issue GH #2814. It may be relevant to backport this in haproxy 3.1.
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.