Cloud & Networking
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You're reading from  The DevOps 2.5 Toolkit

Product typeBook
Published inNov 2019
PublisherPackt
ISBN-139781838647513
Edition1st Edition
Tools
Kubernetes
Concepts
DevOps
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Author (1)
Viktor Farcic
Viktor Farcic
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Viktor Farcic

Viktor Farcic is a senior consultant at CloudBees, a member of the Docker Captains group, and an author. He codes using a plethora of languages starting with Pascal (yes, he is old), Basic (before it got the Visual prefix), ASP (before it got the .NET suffix), C, C++, Perl, Python, ASP.NET, Visual Basic, C#, JavaScript, Java, Scala, and so on. He never worked with Fortran. His current favorite is Go. Viktor's big passions are Microservices, Continuous Deployment, and Test-Driven Development (TDD). He often speaks at community gatherings and conferences. Viktor wrote Test-Driven Java Development by Packt Publishing, and The DevOps 2.0 Toolkit. His random thoughts and tutorials can be found in his blog—Technology Conversations
Read more about Viktor Farcic

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Using HorizontalPodAutoscaler without metrics adapter

If we do not create a metrics adapter, Metrics Aggregator only knows about CPU and memory usage related to containers and nodes. To make things more complicated, that information is limited only to the last few minutes. Since HPA is just concerned about Pods and containers inside them, we are limited to only two metrics. When we create an HPA, it will scale or de-scale our Pods if memory or CPU consumption of the containers that constitute those Pods is above or below predefined thresholds.

Metrics Server periodically fetches information (CPU and memory) from Kubelets running inside worker nodes.

Those metrics are passed to Metrics Aggregator which, in this scenario, does not add any additional value. From there on, HPAs periodically consult the data in the Metrics Aggregator (through its API endpoint). When there is a discrepancy...

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The DevOps 2.5 Toolkit
Published in: Nov 2019Publisher: PacktISBN-13: 9781838647513
© 2019 Packt Publishing Limited All Rights Reserved

Author (1)

author image
Viktor Farcic

Viktor Farcic is a senior consultant at CloudBees, a member of the Docker Captains group, and an author. He codes using a plethora of languages starting with Pascal (yes, he is old), Basic (before it got the Visual prefix), ASP (before it got the .NET suffix), C, C++, Perl, Python, ASP.NET, Visual Basic, C#, JavaScript, Java, Scala, and so on. He never worked with Fortran. His current favorite is Go. Viktor's big passions are Microservices, Continuous Deployment, and Test-Driven Development (TDD). He often speaks at community gatherings and conferences. Viktor wrote Test-Driven Java Development by Packt Publishing, and The DevOps 2.0 Toolkit. His random thoughts and tutorials can be found in his blog—Technology Conversations
Read more about Viktor Farcic

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