Service Discovery


Service Discovery



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Problem Statement

Microservice architecture structures an application as a set of loosely coupled microservices and each service can be developed independently in agile manner to enable continous delivery/deployment. These services often run in containerized/virtual environments and their number of instances and location changes dynamically.

So we require a mechanism to enable client of a microservice to make requests to dynamically changing service instances.

Solution

We can use Service Discovery pattern. To implement this pattern, we need a router/load balancer running at a particular fixed location and a service registry where all microservice instances are registered.

Now a client makes a service request, it will come to the load balancer which then inquires the service registry. If service instance is available, then the request is redirected to the available service instance.


Service Discovery Pattern

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