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Aurelien DARRAGON e4f122f3f4 BUG/MEDIUM: log: fix lf_expr_postcheck() behavior with default section 
Since 7a21c3a4ef ("MAJOR: log: implement proper postparsing for logformat
expressions"), logformat expressions stored in a default section are not
postchecked anymore. This is because the REGISTER_POST_PROXY_CHECK() only
evaluates regular proxies. Because of this, proxy options which are
automatically enabled on the proxy depending on the logformat expression
features in use are not set on the default proxy, which means such options
are not passed to the regular proxies that inherit from it (proxies that
and will actually be running the logformat expression during runtime).

Because of that, a logformat expression stored inside a default section
and executed by a regular proxy may not behave properly. Also, since
03ca16f38b ("OPTIM: log: resolve logformat options during postparsing"),
it's even worse because logformat node options postresoving is also
skipped, which may also alter logformat expression encoding feature.

To fix the issue, let's add a special case for default proxies in
parse_logformat_string() and lf_expr_postcheck() so that default proxies
are postchecked on the fly during parsing time in a "relaxed" way as we
cannot assume that the features involved in the logformat expression won't
be compatible with the proxy actually running it since we may have
different types of proxies inheriting from the same default section.

This bug was discovered while trying to address GH #2597.

It should be backported to 3.0 with 7a21c3a4ef and 03ca16f38b.
2024-06-11 11:00:05 +02:00
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README.md

HAProxy

alpine/musl AWS-LC openssl no-deprecated Illumos NetBSD FreeBSD VTest

HAProxy logo

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:

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.