HAProxy Enterprise Documentation 2.5r1

Logging Comments on Failure

Use the comment directive to define a message that will be reported in the logs if the rule that follows the directive fails.

Define a message indicating a ping test has failed:

option tcp-check
tcp-check comment PING\ phase
tcp-check send PING\r\n

You can also include the comment definition in connect, send, and expect rules.

Define a message indicating a matching HTTP string was not received:

tcp-check expect rstring HTTP/1\..\ (2..|3..) comment check\ HTTP\ response

For complete details, see http-check comment.

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