HAProxy can allow graceful termination and settings how to deal with the duration of “gracefulness”
specifically hard-stop-after
coming from the IoT world, where devices are keeping connections forever and reconnects on connections lost, I see a nice to have feature:
after waiting for the connection drain, hard-stop-after, be able to configure how remaining connections are terminated, either as a rate: connections/sec or simple duration, that will allow to add an additional degree of gracefulness and avoid reconnect storm.
as example:
hard-stop-after 300s
terminate-after 60s
so it will wait 300 sec to drain and will terminate remaining connections during the next 60s window, evenly.
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