Reader small image

You're reading from  The DevOps 2.5 Toolkit

Product typeBook
Published inNov 2019
PublisherPackt
ISBN-139781838647513
Edition1st Edition
Concepts
Right arrow
Author (1)
Viktor Farcic
Viktor Farcic
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

Right arrow

The rules governing nodes scale-up

Cluster Autoscaler monitors Pods through a watch on Kube API. It checks every 10 seconds whether there are any unschedulable Pods (configurable through the --scan-interval flag). In that context, a Pod is unschedulable when the Kubernetes Scheduler is unable to find a node that can accommodate it. For example, a Pod can request more memory than what is available on any of the worker nodes.

Cluster Autoscaler assumes that the cluster is running on top of some kind of node groups. As an example, in the case of AWS, those groups are Autoscaling Groups (ASGs). When there is a need for additional nodes, Cluster Autoscaler creating a new node by increasing the size of a node group.

Cluster Autoscaler assumes that requested nodes will appear within 15 minutes (configurable through the --max-node-provision-time flag). If that period expires and a new...

lock icon
The rest of the page is locked
Previous PageNext Page
You have been reading a chapter from
The DevOps 2.5 Toolkit
Published in: Nov 2019Publisher: PacktISBN-13: 9781838647513

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