On 1/7/23 09:41, Shawn Heisey wrote:
That's really cool.  But I have an oddity I'd like to share and see if it needs some work.

Semi-related but separate:  I have this line in that frontend:

  stats uri /redacted

Which works well ... but it never switches to http/3. The alt-svc header that the frontend specifies is not in the response, even if I move that config before stats.

  http-response add-header alt-svc 'h3=":443"; ma=7200'

That's not causing me any problems ... it's not like http/2 is slow. :) But I did want to mention it, see if you might want to change it. I suspect that for the stats uri there is a lot of frontend config that is ignored.

In case it's important, haproxy -vv:

HAProxy version 2.7.1 2022/12/19 - https://haproxy.org/
Status: stable branch - will stop receiving fixes around Q1 2024.
Known bugs: http://www.haproxy.org/bugs/bugs-2.7.1.html
Running on: Linux 6.0.0-1009-oem #9-Ubuntu SMP PREEMPT_DYNAMIC Thu Dec 8 07:13:10 UTC 2022 x86_64
Build options :
  TARGET  = linux-glibc
  CPU     = native
  CC      = cc
CFLAGS = -O2 -march=native -g -Wall -Wextra -Wundef -Wdeclaration-after-statement -Wfatal-errors -Wtype-limits -Wshift-negative-value -Wshift-overflow=2 -Wduplicated-cond -Wnull-dereference -fwrapv -Wno-address-of-packed-member -Wno-unused-label -Wno-sign-compare -Wno-unused-parameter -Wno-clobbered -Wno-missing-field-initializers -Wno-cast-function-type -Wno-string-plus-int -Wno-atomic-alignment OPTIONS = USE_PCRE2_JIT=1 USE_OPENSSL=1 USE_ZLIB=1 USE_SYSTEMD=1 USE_QUIC=1
  DEBUG   =

Feature list : +EPOLL -KQUEUE +NETFILTER -PCRE -PCRE_JIT -PCRE2 +PCRE2_JIT +POLL +THREAD -PTHREAD_EMULATION +BACKTRACE -STATIC_PCRE -STATIC_PCRE2 +TPROXY +LINUX_TPROXY +LINUX_SPLICE +LIBCRYPT +CRYPT_H -ENGINE +GETADDRINFO +OPENSSL -OPENSSL_WOLFSSL -LUA +ACCEPT4 -CLOSEFROM +ZLIB -SLZ +CPU_AFFINITY +TFO +NS +DL +RT -DEVICEATLAS -51DEGREES -WURFL +SYSTEMD -OBSOLETE_LINKER +PRCTL -PROCCTL +THREAD_DUMP -EVPORTS -OT +QUIC -PROMEX -MEMORY_PROFILING +SHM_OPEN

Default settings :
  bufsize = 16384, maxrewrite = 1024, maxpollevents = 200

Built with multi-threading support (MAX_TGROUPS=16, MAX_THREADS=256, default=48).
Built with OpenSSL version : OpenSSL 1.1.1s+quic  1 Nov 2022
Running on OpenSSL version : OpenSSL 1.1.1s+quic  1 Nov 2022
OpenSSL library supports TLS extensions : yes
OpenSSL library supports SNI : yes
OpenSSL library supports : TLSv1.0 TLSv1.1 TLSv1.2 TLSv1.3
Built with network namespace support.
Support for malloc_trim() is enabled.
Built with zlib version : 1.2.11
Running on zlib version : 1.2.11
Compression algorithms supported : identity("identity"), deflate("deflate"), raw-deflate("deflate"), gzip("gzip") Built with transparent proxy support using: IP_TRANSPARENT IPV6_TRANSPARENT IP_FREEBIND
Built with PCRE2 version : 10.39 2021-10-29
PCRE2 library supports JIT : yes
Encrypted password support via crypt(3): yes
Built with gcc compiler version 11.3.0

Available polling systems :
      epoll : pref=300,  test result OK
       poll : pref=200,  test result OK
     select : pref=150,  test result OK
Total: 3 (3 usable), will use epoll.

Available multiplexer protocols :
(protocols marked as <default> cannot be specified using 'proto' keyword)
       quic : mode=HTTP  side=FE     mux=QUIC  flags=HTX|NO_UPG|FRAMED
         h2 : mode=HTTP  side=FE|BE  mux=H2    flags=HTX|HOL_RISK|NO_UPG
       fcgi : mode=HTTP  side=BE     mux=FCGI  flags=HTX|HOL_RISK|NO_UPG
  <default> : mode=HTTP  side=FE|BE  mux=H1    flags=HTX
         h1 : mode=HTTP  side=FE|BE  mux=H1    flags=HTX|NO_UPG
  <default> : mode=TCP   side=FE|BE  mux=PASS  flags=
       none : mode=TCP   side=FE|BE  mux=PASS  flags=NO_UPG

Available services : none

Available filters :
        [BWLIM] bwlim-in
        [BWLIM] bwlim-out
        [CACHE] cache
        [COMP] compression
        [FCGI] fcgi-app
        [SPOE] spoe
        [TRACE] trace

Thanks,
Shawn

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