April 2018
Intermediate to advanced
468 pages
14h 34m
English
Content preview from Mastering Kubernetes - Second Edition
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Choosing and managing the cluster capacity
With Kubernetes' horizontal pod autoscaling, daemon sets, stateful sets, and quotas, we can scale and control our pods, storage, and other objects. However, in the end, we're limited by the physical (virtual) resources available to our Kubernetes cluster. If all your nodes are running at 100% capacity, you need to add more nodes to your cluster. There is no way around it. Kubernetes will just fail to scale. On the other hand, if you have very dynamic workloads then Kubernetes can scale down your pods, but if you don't scale down your nodes correspondingly, you will still pay for the excess capacity. In the cloud, you can stop and start instances.
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