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For QUIC client support, a token may be emitted along with INITIAL packets during the handshake. The token is encoded during emission via qc_enc_token() called by qc_build_pkt(). The token may be provided from different sources. First, it can be retrieved via <retry_token> quic_conn member when a Retry packet was received. If not present, a token may be reused from the server cache, populated from NEW_TOKEN received from previous a connection. Prior to this patch, the last method may cause an issue. If the upper connection instance is released prior to the handshake completion, this prevents access to a possible server token. This is considered an error by qc_enc_token(). The error is reported up to calling functions, preventing any emission to be performed. In the end, this prevented the either the full quic_conn release or subsizing into quic_conn_closed until the idle timeout completion (30s by default). With abortonclose set now by default on HTTP frontends, early client shutdowns can easily cause excessive memory consumption. To fix this, change qc_enc_token() so that if connection is closed, no token is encoded but also no error is reported. This allows to continue emission and permit early connection release. No need to backport.
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.