#CUSTOM NETFLIX CLIENT HOW TO#
Each permutation of language and developer may end up with their own idea of how to implement this kind of client and now you’re stuck maintaining multiple clients that try to do the same thing but in possibly semantically different ways. As we’ve already said, microservices can be implemented in many different types of languages, so a perfectly fine Java client may be available, but if a Go or NodeJS client doesn’t exist, you have to write it yourself. Moreover, you need to find clients for the programming language you use that can understand how to speak to the service-discovery mechanism.
figure out how to run, manage, and monitor these systems at scale (which is no trivial pet project). decide do I want a AP system ( consul, eureka, etc) or an CP system ( zookeeper, etcd, etc). One of the problems: you as a developer need to do these things: This central service-discovery registry basically keeps track of what services are available in the cluster. Services can be taken down, they can die of their own volition, or we can add more services to a cluster to help scale up. For example, maybe you use Netflix Ribbon to communicate with other services and need to discover where they are running. With Netflix OSS you typically need to set up a service-discovery server that acts as a registry of endpoints that can be discovered with various clients. If you use Kubernetes (or some variant), the answer is: yes. So can the infrastructure help out with service discovery, load balancing and fault tolerance also? Why should this be an application-level thing? Keep your apps and services simple and focused on what they’re supposed to do. For example, OpenShift which is a flavor of Kubernetes built with enterprises in mind, does all of these things for you: there’s nothing you have to force into the application layer that is aware or cares about these things. If we run these services in containers, we can take advantage of powerful language-agnostic infrastructure to do things like builds, packaging, deployments, health checks, rolling upgrades, blue-green deployments, security, and other things. Microservices can be implemented in a variety of frameworks/languages but things like service discovery, load balancing, fault-tolerance, etc are still quite important. They’re sets of libraries/frameworks/configurations that need to be included in your Java application/service code. Netflix OSS is for Java developers mostly. Additionally, because containers are basically opaque packaging of services, we tend not to care as much about what technology is really running inside them (is it Java? is it Node.js? is it Go?). With the emergence of linux containers, Docker, container management systems, etc we’re starting to see a lot of value running our microservices in linux containers (in a cloud, in a private cloud, both, etc). A lot of assumptions about this heritage are baked into the Netflix libraries that may no longer apply based on where you’re running (ie linux containers, etc) today. And that’s just too bad.Īnyway, a lot of Netflix OSS was written at a time where things ran on an AWS cloud and there were no alternatives. 
Some other large internet companies patent their findings and keep them closed source.
Other internet companies do this as well, so thank you. A quick “thank-you” as well that Netflix decided to contribute to the broader open-source community with these libraries and frameworks. Patterns for service discovery, load balancing, fault-tolerance, etc are incredibly important concepts for scalable distributed systems and Netflix brings nice solutions for these. Today, for Java developers, it’s pretty synonymous with developing microservices in a cloud environment. Netflix OSS is a set of frameworks and libraries that Netflix wrote to solve some interesting distributed-systems problems at scale. I get questions from folks about NetflixOSS (it’s awesome) and how it might run in Kubernetes (it’s awesome too!) and where the overlap is for some of the components. Some of this I cover in my book “Microservices for Java Developers” O’Reilly June 2016 (launching soon!), but I want to give a more specific treatment of it here.
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