Hello, I have an issue with haproxy 2.2.26 that I do not have in 2.2.25, it seams to be related to the ring object I use in my configuration for logs.
I do not think it is due to my build (https://github.com/zenetys/rpm-haproxy/commits/haproxy22z) because we did not change it in that branch. I get "unable to find required use_backend: ''" errors. [root@zelk-prod-01 haproxy]# haproxy -f /etc/haproxy/haproxy-extract.cfg -c [NOTICE] 004/130824 (2015177) : haproxy version is 2.2.26-97059ba [NOTICE] 004/130824 (2015177) : path to executable is /usr/sbin/haproxy [ALERT] 004/130824 (2015177) : Proxy 'ft_rsyslog_514': unable to find required use_backend: ''. [ALERT] 004/130824 (2015177) : Fatal errors found in configuration. Here is an extract of the configuration. If I remove the "ring rg_self" bloc and the "log ring@rg_self local5" line in default section, the error does not happen. Did you get any similar report? I did not find anything interesting on the mailing list nor on github issues, but looking at the changelog it looks like there has been changes related to ring buffers? global chroot /var/lib/haproxy pidfile /run/haproxy.pid user haproxy group haproxy daemon ssl-default-bind-ciphers PROFILE=SYSTEM ssl-default-server-ciphers PROFILE=SYSTEM tune.ssl.default-dh-param 4096 maxconn 4000 hard-stop-after 120s stats socket /var/lib/haproxy/stats mode 600 level admin expose-fd listeners stats timeout 30s #lua-load /etc/haproxy/dynft.lua defaults log ring@rg_self local5 option dontlognull option redispatch retries 3 timeout http-request 10s timeout queue 1m timeout connect 10s timeout client 5m timeout server 1m timeout http-keep-alive 10s timeout check 10s backlog 8192 maxconn 3000 ring rg_self format rfc3164 maxlen 2048 size 65536 server rg_self_srv 127.0.0.1:514 frontend ft_rsyslog_514 bind zelk-prod-log:514 tcp-ut 7s mode tcp option tcplog use_backend bk_rsyslog_514 backend bk_rsyslog_514 mode tcp balance leastconn default-server check inter 3000 rise 2 fall 1 server bk_rsyslog_514_srv_01 zelk-prod-01:514 server bk_rsyslog_514_srv_02 zelk-prod-02:514 backup Julien
