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You're reading from  Learn Docker - Fundamentals of Docker 19.x - Second Edition

Product typeBook
Published inMar 2020
PublisherPackt
ISBN-139781838827472
Edition2nd Edition
Tools
Docker
Concepts
Containerization
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Author (1)
Dr. Gabriel N. Schenker
Dr. Gabriel N. Schenker
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Dr. Gabriel N. Schenker

Dr. Gabriel N. Schenker has more than 25 years of experience as an independent consultant, architect, leader, trainer, mentor, and developer. Currently, Gabriel works as Lead Solution Architect at Techgroup Switzerland. Prior to that, Gabriel worked as Lead Curriculum Developer at Docker and at Confluent. Gabriel has a Ph.D. in Physics, and he is a Docker Captain, a Certified Docker Associate, a Certified Kafka Developer and Operator, and an ASP Insider. When not working, Gabriel enjoys time with his wonderful wife Veronicah and his children.
Read more about Dr. Gabriel N. Schenker

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Kubernetes service

The moment we start to work with applications consisting of more than one application service, we need service discovery. The following diagram illustrates this problem:

Service discovery

In the preceding diagram, we have a Web API service that needs access to three other services: payments, shipping, and ordering. The Web API should never have to care about how and where to find those three services. In the API code, we just want to use the name of the service we want to reach and its port number. A sample would be the following URL http://payments:3000, which is used to access an instance of the payments service. 

In Kubernetes, the payments application service is represented by a ReplicaSet of pods. Due to the nature of highly distributed systems, we cannot assume that pods have stable endpoints. A pod can...

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Learn Docker - Fundamentals of Docker 19.x - Second Edition
Published in: Mar 2020Publisher: PacktISBN-13: 9781838827472
© 2020 Packt Publishing Limited All Rights Reserved

Author (1)

author image
Dr. Gabriel N. Schenker

Dr. Gabriel N. Schenker has more than 25 years of experience as an independent consultant, architect, leader, trainer, mentor, and developer. Currently, Gabriel works as Lead Solution Architect at Techgroup Switzerland. Prior to that, Gabriel worked as Lead Curriculum Developer at Docker and at Confluent. Gabriel has a Ph.D. in Physics, and he is a Docker Captain, a Certified Docker Associate, a Certified Kafka Developer and Operator, and an ASP Insider. When not working, Gabriel enjoys time with his wonderful wife Veronicah and his children.
Read more about Dr. Gabriel N. Schenker

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