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DOC: update INSTALL for QUIC with OpenSSL 3.5 usages

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Update the QUIC sections which mention the OpenSSL library use cases.
This commit is contained in:
Frederic Lecaille 2025-05-19 18:59:43 +02:00
parent 08eee0d9cf
commit bbe302087c
1 changed files with 19 additions and 14 deletions
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33
INSTALL
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@ -237,7 +237,7 @@ to forcefully enable it using "USE_LIBCRYPT=1".
-----------------
For SSL/TLS, it is necessary to use a cryptography library. HAProxy currently
supports the OpenSSL library, and is known to build and work with branches
1.0.0, 1.0.1, 1.0.2, 1.1.0, 1.1.1, and 3.0 to 3.4. It is recommended to use
1.0.0, 1.0.1, 1.0.2, 1.1.0, 1.1.1, and 3.0 to 3.5. It is recommended to use
at least OpenSSL 1.1.1 to have support for all SSL keywords and configuration
in HAProxy. OpenSSL follows a long-term support cycle similar to HAProxy's,
and each of the branches above receives its own fixes, without forcing you to
@ -259,10 +259,10 @@ reported to work as well. While there are some efforts from the community to
ensure they work well, OpenSSL remains the primary target and this means that
in case of conflicting choices, OpenSSL support will be favored over other
options. Note that QUIC is not fully supported when haproxy is built with
OpenSSL. In this case, QUICTLS is the preferred alternative. As of writing
this, the QuicTLS project follows OpenSSL very closely and provides update
simultaneously, but being a volunteer-driven project, its long-term future does
not look certain enough to convince operating systems to package it, so it
OpenSSL < 3.5 version. In this case, QUICTLS is the preferred alternative.
As of writing this, the QuicTLS project follows OpenSSL very closely and provides
update simultaneously, but being a volunteer-driven project, its long-term future
does not look certain enough to convince operating systems to package it, so it
needs to be build locally. See the section about QUIC in this document.
A fifth option is wolfSSL (https://github.com/wolfSSL/wolfssl). It is the only
@ -500,10 +500,11 @@ QUIC is the new transport layer protocol and is required for HTTP/3. This
protocol stack is currently supported as an experimental feature in haproxy on
the frontend side. In order to enable it, use "USE_QUIC=1 USE_OPENSSL=1".
Note that QUIC is not fully supported by the OpenSSL library. Indeed QUIC 0-RTT
cannot be supported by OpenSSL contrary to others libraries with full QUIC
support. The preferred option is to use QUICTLS. This is a fork of OpenSSL with
a QUIC-compatible API. Its repository is available at this location:
Note that QUIC is not always fully supported by the OpenSSL library depending on
its version. Indeed QUIC 0-RTT cannot be supported by OpenSSL for versions before
3.5 contrary to others libraries with full QUIC support. The preferred option is
to use QUICTLS. This is a fork of OpenSSL with a QUIC-compatible API. Its
repository is available at this location:
https://github.com/quictls/openssl
@ -531,14 +532,18 @@ way assuming that wolfSSL was installed in /opt/wolfssl-5.6.0 as shown in 4.5:
SSL_INC=/opt/wolfssl-5.6.0/include SSL_LIB=/opt/wolfssl-5.6.0/lib
LDFLAGS="-Wl,-rpath,/opt/wolfssl-5.6.0/lib"
As last resort, haproxy may be compiled against OpenSSL as follows:
As last resort, haproxy may be compiled against OpenSSL as follows from 3.5
version with 0-RTT support:
$ make TARGET=generic USE_OPENSSL=1 USE_QUIC=1
or as follows for all OpenSSL versions but without O-RTT support:
$ make TARGET=generic USE_OPENSSL=1 USE_QUIC=1 USE_QUIC_OPENSSL_COMPAT=1
Note that QUIC 0-RTT is not supported by haproxy QUIC stack when built against
OpenSSL. In addition to this compilation requirements, the QUIC listener
bindings must be explicitly enabled with a specific QUIC tuning parameter.
(see "limited-quic" global parameter of haproxy Configuration Manual).
In addition to this requirements, the QUIC listener bindings must be explicitly
enabled with a specific QUIC tuning parameter. (see "limited-quic" global
parameter of haproxy Configuration Manual).
5) How to build HAProxy