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The technology you are looking for is called Anycast. http://en.wikipedia.org/wiki/Anycast Anycast is a network addressing and routing methodology in which datagrams from a single sender are routed to the topologically nearest node in a group of potential receivers, though it may be sent to several nodes, all identified by the same destination ...


You could setup a VPN across the cluster to use as your private network for etcd and the like. Another option is to build a small app that that acts as the endpoint and talks to the various data centers for you. This is might scale better but it depends on your needs.


This depends on how much control and how much complexity you want to manage/afford. However, your biggest hurdle is if your datacenters are using a similar subnet schemes in multiple datacenters; example, using in two or more datacenters. If all the datacenters are under your management and you can sign off on it, set up an MPLS between all ...

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