8126fd569b
Added the configuration structures that model the OTel filter's instrumentation hierarchy and the utility functions that support the configuration parser. The configuration is organized as a tree rooted at flt_otel_conf, which holds the proxy reference, filter identity, and lists of groups and scopes. Below it, flt_otel_conf_instr carries the instrumentation settings: tracer handle, rate limiting, hard-error mode, logging state, channel analyzers, and placeholder references to groups and scopes. Groups (flt_otel_conf_group) aggregate scopes by name. Scopes (flt_otel_conf_scope) bind an event to its ACL condition, span context declarations, span definitions and a list of spans scheduled for finishing. Spans (flt_otel_conf_span) carry attributes, events, baggages and status entries, each represented as flt_otel_conf_sample structures that pair a key with concatenated sample-expression arguments. All configuration types share a common header macro (FLT_OTEL_CONF_HDR) that embeds an identifier string, its length, a configuration line number, and a list link. Their init and free functions are generated by the FLT_OTEL_CONF_FUNC_INIT and FLT_OTEL_CONF_FUNC_FREE macros in conf_funcs.h, with per-type custom initialization and cleanup bodies. The utility layer in util.c provides argument counting and concatenation for the configuration parser, sample data to string conversion covering boolean, integer, IPv4, IPv6, string and HTTP method types, and debug helpers for dumping argument arrays and linked list state.
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.