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GOAWAY emission should not be emitted before preface. Thus, max_id field from h2c acting as a server is initialized to -1, which prevents its emission until preface is received from the peer. If acting as a client, max_id is initialized to a valid value on the first h2s emission. This causes an issue with reverse HTTP on the active side. First, it starts as a client, so the peer does not emit a preface but instead a simple SETTINGS frame. As role are switched, max_id is initialized much later when the first h2s response is emitted. Thus, if the connection must be terminated before any stream transfer, GOAWAY cannot be emitted. To fix this, ensure max_id is initialized to 0 on h2_conn_reverse() for active connect side. Thus, a GOAWAY indicating that no stream has been handled can be generated. Note that passive connect side is not impacted, as it max_id is initialized thanks to preface reception. This should be backported up to 2.9.
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.