Trigger alternate response based on file presence or other URL response
nginx-forum at forum.nginx.org
Thu Oct 18 16:50:29 UTC 2018
I'll try to make this make sense. I have a few web applications that I can't
change. They are behind an nginx+ loadbalancer. I have separate database
state that indicates whether or not requests should be forwarded to the
upstream, or a status page should be returned.
There is a web service that I can invoke that gives me access to the
database state. I tried using that service as a health_check uri to change
the upstream to "failed", but that doesn't work as the uri is just a path
appended to the host+port.
I could have something monitoring the database state web service running on
the nginx server instance that could, for example, create a flag file on the
nginx server instance that could indicate to nginx how it should deal with
the requests, but I'm not sure if/how I could configure that in nginx.
Would anyone have any suggestions on how I can control how nginx responds
based on state that isn't the upstream?
Many thanks for your help.
Posted at Nginx Forum: https://forum.nginx.org/read.php?2,281639,281639#msg-281639
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