7b6df86a83
The server's "usesrc" keyword supports among other options "client" and "clientip". The former means we bind to the client's IP and port to connect to the server, while the latter means we bind to its IP only. It's done in two steps, first alloc_bind_address() retrieves the IP address and port, and second, tcp_connect_server() decides to either bind to the IP only or IP+port. The problem comes with idle connection pools, which hash all the parameters: the hash is calculated before (and ideally withouy) calling tcp_connect_server(), and it considers the whole struct sockaddr_storage for the hash, except that both client and clientip entirely fill it with the client's address. This means that both client and clientip make use of the source port in the hash calculation, making idle connections almost not reusable when using "usesrc clientip" while they should for clients coming from the same source. A work-around is to force the source port to zero using "tcp-request session set-src-port int(0)" but it's ugly. Let's fix this by properly zeroing the port for AF_INET/AF_INET6 addresses. This can be backported to 2.4. Thanks to Sebastien Gross for providing a reproducer for this problem.
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.