HAProxy

Log HTTP response body in HAProxy (for debugging)

Put this in haproxy configuration.

option http-buffer-request
declare capture request len 400
http-request capture req.body id 0
log-format {"%[capture.req.hdr(0)]"}

Prevent HAProxy from toggling back to master (HA active-passive)

• https://serverfault.com/questions/220681/prevent-haproxy-from-toggling-back-from-fallback-to-master/232324