On Fri, May 14, 2021 at 11:58 AM Willy Tarreau <w...@1wt.eu> wrote: > - interoperability / protocol support: WebSocket over HTTP/2 (RFC8441) > is now supported on both sides, regardless of the version on the other > side. The cache now supports the "Vary" header with a few commonly > used headers, including "Accept-encoding" which gets normalized for > optimal cache hit ratio. The Prometheus exporter got a significant > liftup, requires less tricks on the Prometheus side, and supports > listing only certain metrics for faster retrieval. Optional native > support for Opentracing was also integrated (via USE_OT=1). The DNS > resolvers now support talking to servers over TCP. Basic support for > extracting information from MQTT and FIX protocol was added. Timeouts > can now be adjusted on the fly and per-request in order to adapt to > particuarly slow servers or special protocols.
Regarding prometheus, it should probably noted some major changes regarding some metrics, such as for health check, where the value is now located in a label, instead of the value of the metric itself: see also http://git.haproxy.org/?p=haproxy.git;a=commit;h=de3c32638925c2071a5a84cbdafe2f112d2c4261 -- William
