Handling disaster recovery and geographic distribution with Nginx

Clustering a microservice, or a web application, in a single datacenter can help us in performance and availability, but what’s happens when our users are distributed worldwide, or there is a disaster and our data center isn’t more available?

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So, we decide to serve our application from the closest datacenter to the user, to improve network latency, database load, and in general performance, and, moreover, we will use the other datacenter as a backup…