53c3046898
In the SPOE specification, when an error occurred on the SPOP connection, HAProxy must send a DISCONNECT frame and wait for the agent DISCONNECT frame in return before trully closing the connection. However, this part was not properly handled by the SPOP multiplexer. In this case, the SPOP connection should be in the CLOSING state. But this state was not used at all. Depending on when the error was encountered, the connection could be closed immediately, without sending any DISCONNECT frame. It was the case when an early error was detected during the AGENT-HELLO frame parsing. Or it could be moved from ERROR to FRAME_H state, as if no error were detected. This case was less dramatic than it seemed because some flags were also set to prevent any problem. But it was not obvious. So now, the SPOP connection is properly switch to CLOSING state when an DISCONNECT is sent to the agent to be able to wait for its DISCONNECT in reply. spop_process_demux() was updated to parse frames in that state and some validity checks was added. This patch must be backport to 3.1.
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.