40ac0fd932
Added the "otel-group" action keyword that allows executing a named group of OTel scopes from HAProxy TCP and HTTP action rule contexts. The new group.c module registers the "otel-group" keyword for all four action contexts (tcp-request, tcp-response, http-request, http-response) and implements the action lifecycle callbacks. The parser flt_otel_group_parse() accepts a filter ID and group ID as arguments, duplicates them into the action rule's argument slots, and wires up the check, action, and release callbacks. The post-parse validator flt_otel_group_check() resolves the filter ID and group ID string references into direct configuration pointers by searching the proxy's filter list for a matching OTel filter and then looking up the named group within that filter's configuration. The action handler flt_otel_group_action() retrieves the filter and group configuration from the resolved rule arguments, verifies the filter is attached to the stream and not disabled, then iterates through all scopes in the group and executes each via flt_otel_scope_run() with a shared timestamp pair. This allows operators to trigger OTel instrumentation conditionally from HAProxy rules, for example applying different tracing scopes based on ACL conditions or request properties.
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.