d971d3fed8
Takeover operation defines an argument <release>. It's a boolean which if set indicate that freed connection resources during the takeover does not have to be reallocated on the new thread. Typically, it is set to false when takever is performed to reuse a connection. However, when used to be able to delete a connection from a different thread, <release> should be set to true. Previously, <release> was only set in conjunction with "del server" handler. This operation was performed under thread isolation, which guarantee that not thread-safe operation such as removal from buf_wait list could be performed on takeover if <release> was true. In the contrary case, takeover operation would fail. Recently, "del server" handler has been adjusted to remove idle connection cleanup with takeover. As such, <release> is never set to true in remaining takeover usage. However, takeover is also used to enforce strict-maxconn on a server. This is performed to delete a connection from any thread, which is the primary reason of <release> to true. But for the moment as takeover implementers considers that thread isolation is active if <release> is set, this is not yet applicable for strict-maxconn usage. Thus, the purpose of this patch is to adjust takeover implementation. Remove assumption between <release> and thread-isolation mode. It's not possible to remove a connection from a buf_wait list, an error will be return in any case.
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.