9b6389c8a0
Consuming randoms in pairs directly exposes the internal PRNG's state on moderately idle system. It can allow to predict next (or previous) UUIDs, QUIC retry tokens, and WS keys for example. Let's insert an XXH64 call on the ha_random64() output to avoid this. We expand the boot seed as the secret at boot, and use now_ns as the seed for each call. The original ha_random64() function was renamed to ha_random64_internal() for use cases where it's not a problem to directly use the internal state. The performance loss is only measurable when single-threaded. It drops from 7.32M UUID per second to 7.16M. Above that there is no longer any difference due to the DWCAS loop which reaches up to 98.5% CPU at 20 threads. This will need to be backported to stable releases after a period of observation. |
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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.