I'm currently investigating an issue of random "Layer4" timeouts being reported by health checks used in HAPRoxy. The actual backend server being checked is proven to be up and responding at the time of these errors, as other trafic to the server is flowing through.
Thus making me suspect there might be issues caused by our configuration.
Server health is currently configured as follow:
option httpchk GET /health HTTP/1.1\r\nHost:\ Haproxy\r\nConnection:\ close
http-check expect string OK
server server1 server1.internal.example.com check check-ssl port 443 verify none inter 3s fall 2 backup
Trying to understand the docs, I see the "http-check connect" and "linger" options being mentioned. Would the "connect" directive make any actual difference to how the connection for the health check is set up compared to our current conf?
Any other feedback/observartions on the above config is welcome.
