BUG/MINOR: checks: prevent http keep-alive with http-check expect
Sébastien Rohaut reported that string negation in http-check expect didn't
work as expected.
The misbehaviour is caused by responses with HTTP keep-alive. When the
condition is not met, haproxy awaits more data until the buffer is full or the
connection is closed, resulting in a check timeout when "timeout check" is
lower than the keep-alive timeout on the server side.
In order to avoid the issue, when a "http-check expect" is used, haproxy will
ask the server to disable keep-alive by automatically appending a
"Connection: close" header to the request.
(cherry picked from commit 32602d23610981b48143d1f82885b8cfae286e0f)
2 files changed