HAProxy - Load balancer
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Willy Tarreau 0284be5456 BUG/MEDIUM: limits: properly account for global.maxpipes in compute_ideal_maxconn()
Starting a config with maxpipes and no maxconn always ended up in error
because the number of FDs needed for pipes was not deduced from the total
number of FDs when calculating maxconn, and was later found to exceed the
total number of allocatable FD during final checks.

When global.maxpipes is set, it must be used during compute_ideal_maxconn()
so that it's properly deduced.

Without this, just having "maxpipes 500" in a config prevents it from
starting. With the fix, it properly starts with a maxconn adjusted
depending on the number of splice-enabled proxies.

This should be backported, theoretically everywhere, but preferably
progressively. The following config should fail on affected versions
and load with fixed ones:

   global
        maxpipes 500

   frontend srv1
        bind :8001
2026-05-19 15:19:23 +02:00
.github CI: github: add DEBUG_STRICT=2 to ASAN jobs 2026-04-30 17:46:30 +02:00
addons BUILD: 51d.c: cleanup, fix preprocessor ifdefs 2026-05-13 17:00:20 +02:00
admin CLEANUP: fix typos and spelling in comments and documentation 2026-03-30 09:24:19 +02:00
dev CLEANUP: fix typos and spelling in comments and documentation 2026-03-30 09:24:19 +02:00
doc DOC: config: further clarify that resolvers "default" exists 2026-05-19 14:48:27 +02:00
examples MEDIUM: mux_quic: rename qmux traces to qcm 2026-05-13 16:23:58 +02:00
include CLEANUP: address a few typos and copy-paste errors in httpclient and dns 2026-05-15 18:25:13 +02:00
reg-tests MINOR: proxy: remove the experimental status on dynamic backends 2026-05-19 14:56:45 +02:00
scripts SCRIPTS: announce-release: add a link to the OpenTelemetry filter 2026-05-08 12:05:09 +02:00
src BUG/MEDIUM: limits: properly account for global.maxpipes in compute_ideal_maxconn() 2026-05-19 15:19:23 +02:00
tests TESTS: quic: add unit-tests for QUIC TX part 2025-09-08 14:49:03 +02:00
.cirrus.yml CI: cirrus-ci: bump FreeBSD image to 14-3 2025-10-09 14:06:48 +02:00
.gitattributes MINOR: Configure the cpp userdiff driver for *.[ch] in .gitattributes 2021-02-22 18:17:57 +01:00
.gitignore MINOR: tevt/dev: Add term_events tool 2025-01-31 10:41:50 +01:00
.mailmap DOC: update Tim's address in .mailmap 2021-09-16 09:14:14 +02:00
.travis.yml MEDIUM: mworker: remove USE_SYSTEMD requirement for -Ws 2024-11-20 12:07:38 +01:00
BRANCHES CLEANUP: tree-wide: fix typos in user-invisible files 2026-05-13 17:03:48 +02:00
BSDmakefile BUILD: makefile: commit the tiny FreeBSD makefile stub 2023-05-24 17:17:36 +02:00
CHANGELOG [RELEASE] Released version 3.4-dev12 2026-05-13 17:22:12 +02:00
CONTRIBUTING CLEANUP: assorted typo fixes in the code and comments 2025-04-02 11:12:20 +02:00
INSTALL MINOR: version: mention that it's development again 2025-11-26 16:11:47 +01:00
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 MINOR: mux_quic: rename qstrm files to qmux 2026-05-13 16:15:48 +02:00
README.md CI: github: add cross-zoo.yml in README.md 2026-04-20 11:47:20 +02:00
SUBVERS BUILD: use format tags in VERDATE and SUBVERS files 2013-12-10 11:22:49 +01:00
VERDATE [RELEASE] Released version 3.4-dev12 2026-05-13 17:22:12 +02:00
VERSION [RELEASE] Released version 3.4-dev12 2026-05-13 17:22:12 +02:00

HAProxy

AWS-LC Illumos NetBSD CrossCompile 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.