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Showing posts from January, 2017

nginx + a backend with a dynamic IP (e.g. AWS ELB)

Recently, I wrote about the dynamic resolution of upstream servers in nginx which was achieved by quite an intrusive patch to the core nginx module. The patch was invented a while ago and was working very well up until recent nginx versions were released. With the release of nginx 1.10 it was noticed that the patch crashes some workers under heavy load and this was unacceptable for the production load, hence a new approach was implemented.The beauty of the new solution is that it is non-intrusive and works with any services that communicate via sockets.