8a96216847
IPv6 connectivity might start off (e.g. network not fully up when haproxy starts), so for features like resolvers, it would be nice to periodically recheck. With this change, instead of having the resolvers code rely on a variable indicating connectivity, it will now call a function that will check for how long a connectivity check hasn't been run, and will perform a new one if needed. The age was set to 30s which seems reasonable considering that the DNS will cache results anyway. There's no saving in spacing it more since the syscall is very check (just a connect() without any packet being emitted). The variables remain exported so that we could present them in show info or anywhere else. This way, "dns-accept-family auto" will now stay up to date. Warning though, it does perform some caching so even with a refreshed IPv6 connectivity, an older record may be returned anyway.
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.