ca5dbc2a9f
Unlike the detection performed during sendto() for an unreachable peer, ECONNREFUSED was not handled when received via recvmsg() as an ICMP "host unreachable" message. This patch tracks ECONNREFUSED errors on the receive path. Note that this detection is entirely dependent on the remote host effectively sending an ICMP "host unreachable" message and on the absence of any network filtering (e.g., firewalls) that would drop such ICMP packets. Without receiving this ICMP signal, the connection state cannot be updated through this mechanism. At a higher level, similar to how this error is handled on sendto(), the connection is now terminated as soon as possible by calling qc_kill_conn(). This triggers a call to qc_notify_err(). When the mux does not exist, it attempts to create one via conn_create_mux(). While the latter systematically fails if the connection is flagged with CO_FL_ERROR, it has the useful side effect of waking the stconn stream attached to the connection during a session opening without a mux (e.g., for H3). This issue was caught by haload (upcoming tool). Must be backported as far as 2.6 because it impacts both the QUIC frontends and backends. |
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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.