c26ac3f5e4
Since 9561b9fb6 ("BUG/MINOR: sink: add tempo between 2 connection
attempts for sft servers"), there is a possibility that the tempo we use
to schedule the task expiry may point to TICK_ETERNITY as we add ticks to
tempo with a simple addition that doesn't take care of potential wrapping.
When this happens (although relatively rare, since now_ms only wraps every
49.7 days, but a forced wrap occurs 20 seconds after haproxy is started
so it is more likely to happen there), the process_sink_forward() task
expiry being set to TICK_ETERNITY, it may never be called again, this
is especially true if the ring section only contains a single server.
To fix the issue, we must use tick_add() helper function to set the tempo
value and this way we ensure that the value will never be TICK_ETERNITY.
It must be backported everywhere 9561b9fb6 was backported (up to 2.6
it seems).
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.