When will primary server come back in http upstream module?

B.R. reallfqq-nginx at yahoo.fr
Thu Jun 22 08:01:45 UTC 2017

   1. 'unavailable' means the server will automatically and temporarily be
   removed from the pool of servers managed by the upstream (same effect as
   manually parametering it as down)
   2. the fail_timeout parameter documentation of the very section you
   provided a link to is pretty clear: this value both configure the duration
   during which the parametered amount of failure must be recorded and the
   time during which the server will subsequently be unavailable

*B. R.*

On Wed, Jun 21, 2017 at 3:54 PM, linbo liao <llbgurs at gmail.com> wrote:

> Hi,
> Refer to http://nginx.org/en/docs/http/ngx_http_upstream_module.html#server
> , if all primary server are unavailable, backup server will handle request.
> I have two question?
> 1.  What's the meaning of unavailable?
> 2.  When will primary server come back, after fail_timeout?
> Thanks,
> Linbo
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