e3eb6a9035
During tcp/http transaction processing, haproxy may produce logs at different steps during the processing (accept, connect, request, response, close). But the behavior is hardly configurable because haproxy will only emit a single log per transaction, and by default it will try to produce the log once all log aliases or fetches used in the logformat could be satisfied, which means the log is often emitted during connection teardown, unless "option logasap" is used. We were often asked to have a way to emit multiple logs for a single transaction, like for instance emit log during accept, then request, response and close for instance, see GH #401 for more context. Thanks to "log-steps" keyword introduced by commit "MINOR: log: introduce "log-steps" proxy keyword", it is now possible to explictly configure when logs should be generated by haproxy when processing a transaction. This commit adds the required checks so that log-steps proxy option is properly considered for existing logs generated by haproxy. If "log-steps" is not specified on the proxy, the old behavior is preserved. Note: a slight cpu overhead should only be visible when "log-steps" keyword will be used due to the implementation relying on eb32 lookup instead of basic bitfield check as described in "MINOR: proxy: add log_steps struct member". However, the default behavior shouldn't be affected. When combining log-steps with log-profiles, user has the ability to explicitly control how and when haproxy should generate logs during requests handling.
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.