1adc796c4b
Now the stat_cols_info array contains all info that prometheus requires, stop using the promex_global_metrics array that contains redundant infos. Initial goal was to completely drop the promex_global_metrics array. However it was deemed no longer relevant as prometheus stats rely on a custom name that cannot be derived from stat_cols_info[], unless we add a specific ".promex_name" field or similar to name the stats for prometheus. This is what was carried over on a first attempt but it proved to burden stat_cols_info[] array (not only memory wise, it is quite confusing to see promex in the main codebase, given that prometheus is shipped as an optional add-on). The new strategy consists in revamping the promex_global_metrics array from promex_metric (with all redundant fields for metrics) to a simple ID<==>IST mapping. If the metric is mapped, then it means promex addon should advertise it (using the name provided in the mapping). Now for all the metric retrieval, no longer rely on built-in hardcoded values but instead leverage the new stat cols API. The tricky part is the .type association because the general rule doesn't apply for all metrics as it seems that we stated that some non-counters oriented metrics (at least from haproxy point of view) had to be presented as counter metrics. So in this patch we add some special treatment for those metrics to emulate the old behavior. If that's not relevant in the future, it may be removed. But this requires to ensure that promex users will properly cope with that change. At least for now, no change of behavior should be expected.
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.