this module can help you ! HttpUpstreamJdomainModule, http://wiki.nginx.org/HttpUpstreamJdomainModule.
It buffers the latest IPs of the host,even local dns server down, nginx will work well. On Tue, Aug 19, 2014 at 1:43 PM, ywsample <[email protected]> wrote: > http { > resolver 127.0.0.1; > resolver_timeout 1s; > server { > listen 8000; > location /test { > proxy_pass http://$arg_host:8080; > } > } > server { > listen 8080; > ....... > } > } > ps: other configure is normal > > I have recently discoverd that when DNS server down, the first proxy > request return 504 and than the follow proxy request may hang forever. > I use two curl simulate concurrent requests > > I found than the first request timeout in 1 second and exit, also it > delete the timeout timer. because another request waiting dns response, so > nginx retry send dns query, but dns never response(because it down), it > lead to the follow request hang and also no timer relate to it; > > PS：base on nginx-1.7.4 > -- > ywsample :) > > > _______________________________________________ > nginx mailing list > [email protected] > http://mailman.nginx.org/mailman/listinfo/nginx >
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