Hi List, Baptiste,After updating haproxy i found that the DNS resolver is no longer working for me. Also i wonder about the exact effect that 'hold valid' should have. I pointed haproxy to a 'Unbound 1.9.4' dns server that does the recursive resolving of the dns request made by haproxy.
Before commit '2.2-dev0-13a9232, released 2020/01/22 (use additional records from SRV responses)' i get seemingly proper working resolving of server a name. After this commit all responses are counted as 'invalid' in the socket stats.
Attached also a pcap of the dns traffic. Which shows a short capture of a single attempt where 3 retries for both A and AAAA records show up. There is a additional record of type 'OPT' is present in the response.. But the exact same keeps repeating every 5 seconds. As for 'hold valid' (tested with the commit before this one) it seems that the stats page of haproxy shows the server in 'resolution' status way before the 3 minute 'hold valid' has passed when i simply disconnect the network of the server running the Unbound-DNS server. Though i guess that is less important that dns working at all in the first place..
If any additional information is needed please let me know :). Can you/someone take a look? Thanks in advance.p.s. i think i read something about a 'vtest' that can test the haproxy DNS functionality, if you have a example that does this i would be happy to provide a vtest with a reproduction of the issue though i guess it will be kinda 'slow' if it needs to test for hold valid timings..
Regards, PiBa-NL (Pieter) #### haproxy config: resolvers globalresolvers nameserver pfs_routerbox 192.168.0.18:53 resolve_retries 3 timeout retry 200 hold valid 3m hold nx 10s hold other 15s hold refused 20s hold timeout 25s hold obsolete 30s timeout resolve 5s frontend nu_nlbind 192.168.0.19:433 name 192.168.0.19:433 ssl crt-list /var/etc/haproxy/nu_nl.crt_list
mode http log global option http-keep-alive timeout client 30000 use_backend nu.nl_ipvANY backend nu.nl_ipvANY mode http id 2113 log global timeout connect 30000 timeout server 30000 retries 3option httpchk GET / HTTP/1.0\r\nHost:\ nu.nl\r\nAccept:\ */* server nu_nl nu.nl:443 id 2114 ssl check inter 10000 verify none resolvers globalresolvers check-sni nu.nl resolve-prefer ipv4
#### haproxy_socket.sh show resolvers Resolvers section globalresolvers nameserver pfs_routerbox: sent: 216 snd_error: 0 valid: 0 update: 0 cname: 0 cname_error: 0 any_err: 108 nx: 0 timeout: 0 refused: 0 other: 0 invalid: 108 too_big: 0 truncated: 0 outdated: 0 #### haproxy -vv HA-Proxy version 2.2-dev0-13a9232 2020/01/22 - https://haproxy.org/ Status: development branch - not safe for use in production. Known bugs: https://github.com/haproxy/haproxy/issues?q=is:issue+is:open Build options : TARGET = freebsd CPU = generic CC = ccCFLAGS = -pipe -g -fstack-protector -fno-strict-aliasing -fno-strict-aliasing -Wdeclaration-after-statement -fwrapv -fno-strict-overflow -Wno-null-dereference -Wno-unused-label -Wno-unused-parameter -Wno-sign-compare -Wno-ignored-qualifiers -Wno-unused-command-line-argument -Wno-missing-field-initializers -Wno-address-of-packed-member -DFREEBSD_PORTS -DFREEBSD_PORTS OPTIONS = USE_PCRE=1 USE_PCRE_JIT=1 USE_REGPARM=1 USE_STATIC_PCRE=1 USE_GETADDRINFO=1 USE_OPENSSL=1 USE_LUA=1 USE_ACCEPT4=1 USE_ZLIB=1
Feature list : -EPOLL +KQUEUE -MY_EPOLL -MY_SPLICE -NETFILTER +PCRE +PCRE_JIT -PCRE2 -PCRE2_JIT +POLL -PRIVATE_CACHE +THREAD -PTHREAD_PSHARED +REGPARM +STATIC_PCRE -STATIC_PCRE2 +TPROXY -LINUX_TPROXY -LINUX_SPLICE +LIBCRYPT -CRYPT_H -VSYSCALL +GETADDRINFO +OPENSSL +LUA -FUTEX +ACCEPT4 -MY_ACCEPT4 +ZLIB -SLZ +CPU_AFFINITY -TFO -NS -DL -RT -DEVICEATLAS -51DEGREES -WURFL -SYSTEMD -OBSOLETE_LINKER -PRCTL -THREAD_DUMP -EVPORTS
Default settings : bufsize = 16384, maxrewrite = 1024, maxpollevents = 200 Built with multi-threading support (MAX_THREADS=64, default=2). Built with OpenSSL version : OpenSSL 1.1.1a-freebsd 20 Nov 2018 Running on OpenSSL version : OpenSSL 1.1.1a-freebsd 20 Nov 2018 OpenSSL library supports TLS extensions : yes OpenSSL library supports SNI : yes OpenSSL library supports : SSLv3 TLSv1.0 TLSv1.1 TLSv1.2 TLSv1.3 Built with Lua version : Lua 5.3.5 Built with transparent proxy support using: IP_BINDANY IPV6_BINDANY Built with PCRE version : 8.43 2019-02-23 Running on PCRE version : 8.43 2019-02-23 PCRE library supports JIT : yes Encrypted password support via crypt(3): yes Built with zlib version : 1.2.11 Running on zlib version : 1.2.11Compression algorithms supported : identity("identity"), deflate("deflate"), raw-deflate("deflate"), gzip("gzip")
Available polling systems : kqueue : pref=300, test result OK poll : pref=200, test result OK select : pref=150, test result OK Total: 3 (3 usable), will use kqueue. Available multiplexer protocols : (protocols marked as <default> cannot be specified using 'proto' keyword) h2 : mode=HTTP side=FE|BE mux=H2 fcgi : mode=HTTP side=BE mux=FCGI <default> : mode=HTTP side=FE|BE mux=H1 <default> : mode=TCP side=FE|BE mux=PASS Available services : none Available filters : [SPOE] spoe [CACHE] cache [FCGI] fcgi-app [TRACE] trace [COMP] compression
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