Hi all, I am running HAProxy 2.3.14 in a Kubernetes cluster managed by the haproxy-ingress ingress controller: https://github.com/jcmoraisjr/haproxy-ingress
There are sporadic connection resets and by capturing traffic I could identify the proxy to be the origin. The author of haproxy-ingress suggested that it might be a crash of the proxy and suggested to reach out here. What I am seeing is regular traffic until the proxy suddenly sends a FIN/ACK to the server. The server is surprised by this and replies with a RST/ACK which the proxy forwards to the client. From the logs of the ingress controller, I could see that a reload was going on at that time and the connection was 20 seconds old. In my setting, there are about 4800 backends and frequent changes to them that require reloads. At the same time, there are many long-living TCP connections incoming so old processes will not quickly terminate. At times, there are > 400 haproxy processes running and there are usually 200-300 processes running at any given time. I am wondering if there are known issues that could be the root of this or what I could do to prevent such resets. Any help would be appreciated. More context: https://github.com/jcmoraisjr/haproxy-ingress/issues/899 Reload happens via: haproxy -f "$PARAM_CFG" -p "$HAPROXY_PID" -D -sf $OLD_PID -x "$HAPROXY_SOCKET" Global and default settings: global daemon unix-bind mode 0600 nbthread 63 cpu-map auto:1/1-63 0-62 stats socket /var/run/haproxy/admin.sock level admin expose-fd listeners mode 600 maxconn 30100 tune.ssl.default-dh-param 2048 ssl-default-bind-ciphers ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384 ssl-default-bind-ciphersuites TLS_AES_128_GCM_SHA256:TLS_AES_256_GCM_SHA384:TLS_CHACHA20_POLY1305_SHA256 ssl-default-bind-options no-sslv3 no-tlsv10 no-tlsv11 no-tls-tickets ssl-default-server-ciphers ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384 ssl-default-server-ciphersuites TLS_AES_128_GCM_SHA256:TLS_AES_256_GCM_SHA384:TLS_CHACHA20_POLY1305_SHA256 pp2-never-send-local defaults log global maxconn 30100 option redispatch option http-server-close option http-keep-alive timeout client 50s timeout client-fin 50s timeout connect 5s timeout http-keep-alive 1m timeout http-request 5s timeout queue 5s timeout server 50s timeout server-fin 50s timeout tunnel 24h Thanks and best regards Joerg
