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Release It!, 2nd Edition by Michael T. Nygard

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Discovering Services

There are two cases where service discovery becomes important. First, your organization may have too many services for DNS management to be practical. Second, you may be in a highly dynamic environment. Container-based environments usually hit both of these criteria, but that’s not the only case.

“Service discovery” really has two parts. First, it’s a way that instances of a service can announce themselves to begin receiving a load. This replaces statically configured load balancer pools with dynamic pools. Any kind of load balancer—whether done with hardware or software—can do this. It doesn’t require a special “cloud aware” load balancer.

The second part is lookup. A caller needs to know at least one IP address to ...

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