Need more details about max_fails and fail_timeout

[Sun Yijiang]

Hi,

I'm new to nginx, spent a morning reading nginx documentation.  I'm still
not clear how nginx determines the status of upstream servers.  Let's say we
have some upstream servers, all set to max_fails=3 and fail_timeout=30s.
According to the document, if one server fails 3 times within 30s time,
nginx will mark this server to be inoperative and won't direct any request
to it.  Is that right?  Then the question is: will nginx try this server
again later to see if it recovers?  If it does, what's the algorithm?  If it
doesn't, is there any way to inform nginx after the server recovers?


Steve
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