Projects / HAproxy

HAproxy

HAproxy is a high-performance and highly-robust TCP and HTTP load balancer which provides cookie-based persistence, content-based switching, advanced traffic regulation with surge protection, automatic failover, run-time regex-based header control, Web-based reporting, advanced logging to help trouble-shooting buggy applications and/or networks, and a few other features. Its own event-driven state machine achieves 20,000 hits per second and surpasses GigaEthernet on modern hardware, even with tens of thousands of simultaneous connections.

Tags	Networking Internet Web
Licenses	GPL
Operating Systems	POSIX Linux BSD OpenBSD Solaris
Implementation	C

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Recent releases

1.4.17

05 Sep 2011 09:35

Release Notes: White space past the end of header values was not ignored, causing a space-padded content-length header to be rejected as invalid. A few minor improvements were made. The halog tool was improved to support more filtering criteria and to be noticeably faster. There is no need to upgrade for already running setups.

1.5-dev5

29 Mar 2011 08:57

Release Notes: Many changes were made, most of them bugfixes. Server-side IPv6 and server-side PROXY protocol support was added. All other changes are internal architecture changes needed to support server-side keep-alive later. Users of other 1.5 development versions are encouraged to upgrade, with the usual care needed for a development version.

1.4.14

29 Mar 2011 08:57

Release Notes: Many bugs were fixed, including http-pretend-keepalive, stuck sessions, balanced url_param with POST requests, incorrect chunk size computations on buffer boundaries, incorrectly set rlimits, incorrect removal of the last header, handling of empty pattern files, and 4GB+ content-length on 32-bit machines. A few improvements were made in the CLI, new ACLs were added, and the efficiency of chunked encoded transfers was improved. All 1.4 users are strongly encouraged to upgrade.

1.4.10

29 Nov 2010 09:06

Release Notes: A possible crash when using Cookie-based persistence with appsessions was fixed. Header processing could become wrong after a single reqidel rule removed exactly two headers. Strict aliasing was explicitly disabled to shut down warnings that are emitted with gcc 4.4. Some out-of-memory conditions were not correctly handled in appsession or cookie captures. A native target was added to make builds easier. Users of appsessions are strongly encouraged to upgrade.

1.5-dev3

13 Nov 2010 22:57

Release Notes: All fixes from version 1.4.9 were merged. Stickiness tables can now be synchronized between multiple active haproxy nodes. Sticky information is also learned from responses, providing support for SSL-ID. Connections can be accepted over Unix sockets. A new PROXY protocol was implemented to let other components (such as stunnel) pass connection information to haproxy.