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Aurelien DARRAGON 983513d901 DEBUG: hlua: distinguish burst timeout errors from exec timeout errors 
hlua burst timeout was introduced in 58e36e5b1 ("MEDIUM: hlua: introduce
tune.lua.burst-timeout").

It is a safety measure that allows to detect when too much time is spent
on a single lua execution (between 2 interruptions/yields), meaning that
the current thread is not able to perform other tasks. Such scenario
should be avoided because it will cause thread contention which may have
negative performance impact and could cause the watchdog to trigger. When
the burst timeout is exceeded, the current Lua execution is aborted and a
timeout error is reported to the user.

Unfortunately, the same error is currently being reported for cumulative
(AKA execution) timeout and for burst timeout, which may be confusing to
the user.

Indeed, "execution timeout" error historically results from the current
hlua context exceeding the total (cumulative) time it's allowed to run.
It is set per lua context using the dedicated tunables:
 - tune.lua.session-timeout
 - tune.lua.task-timeout
 - tune.lua.service-timeout

We've already faced an user report where the user was able to trigger the
burst timeout and got "Lua task: execution timeout." error while the user
didn't set cumulative timeout. Thus the error was actually confusing
because it was indeed the burst timeout which was causing it due to the
use of cpu-intensive call from within the task without sufficient manual
"yield" keypoints around the cpu-intensive call to ensure it runs on a
dedicated scheduler cycle.

In this patch we make it so burst timeout related errors are reported as
"burst timeout" errors instead of "execution timeout" errors (which
in fact became the generic timeout errors catchall with 58e36e5b1).

To do this, hlua_timer_check() now returns a different value depending if
the exeeded timeout is the burst one or the cumulative one, which allows
us to return either HLUA_E_ETMOUT or HLUA_E_BTMOUT in hlua_ctx_resume().

It should improve the situation described in GH #2356 and may possibly be
backported with 58e36e5b1 to improve error reporting if it applies without
resistance.
2024-06-14 18:25:58 +02:00
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admin ADMIN: acme.sh: remove the old acme.sh code 2024-05-31 13:37:47 +02:00
dev DEV: patchbot: prepare for new version 3.1-dev 2024-05-29 14:38:21 +02:00
doc [RELEASE] Released version 3.1-dev1 2024-06-14 16:04:18 +02:00
examples CLEANUP: assorted typo fixes in the code and comments 2023-11-23 16:23:14 +01:00
include DEBUG: hlua: distinguish burst timeout errors from exec timeout errors 2024-06-14 18:25:58 +02:00
reg-tests REGTESTS: log: add a test for log-profile 2024-06-13 15:43:10 +02:00
scripts CI: scripts: build vtest using multiple CPUs 2024-05-27 12:15:50 +02:00
src DEBUG: hlua: distinguish burst timeout errors from exec timeout errors 2024-06-14 18:25:58 +02:00
tests MINOR: ist: define iststrip() new function 2024-04-26 11:29:25 +02:00
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BRANCHES DOC: fix some spelling issues over multiple files 2021-01-08 14:53:47 +01:00
BSDmakefile BUILD: makefile: commit the tiny FreeBSD makefile stub 2023-05-24 17:17:36 +02:00
CHANGELOG [RELEASE] Released version 3.1-dev1 2024-06-14 16:04:18 +02:00
CONTRIBUTING CLEANUP: assorted typo fixes in the code and comments 2021-08-16 12:37:59 +02:00
INSTALL DOC: INSTALL: minimum AWS-LC version is v1.22.0 2024-06-14 12:06:03 +02:00
LICENSE LICENSE: add licence exception for OpenSSL 2012-09-07 13:52:26 +02:00
MAINTAINERS MAJOR: spoe: Let the SPOE back into the game 2024-05-22 09:04:38 +02:00
Makefile REORG: ssl: move the SNI selection code in ssl_clienthello.c 2024-06-13 16:48:17 +02:00
README.md DOC: change the link to the FreeBSD CI in README.md 2024-06-03 15:21:29 +02:00
SUBVERS BUILD: use format tags in VERDATE and SUBVERS files 2013-12-10 11:22:49 +01:00
VERDATE [RELEASE] Released version 3.1-dev1 2024-06-14 16:04:18 +02:00
VERSION [RELEASE] Released version 3.1-dev1 2024-06-14 16:04:18 +02:00

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.