Errata: Distinct between node capacity and node allocatable

[embano1]

This is a copy over from the errata page to allow for better discussions:

Printed edition, Page 19 1st paragraph:

Speaking of "capacity" in the paragraph, it might be worth pointing out that this is allocatable capacity on the node, not node_capacity. Also a hint that InitContainers contribute to resource requirements (and thus scheduling) would be nice.

Note from the Author or Editor:
Hi Michael,

thanks a lot for your feedback. I'm not 100% sure what you mean with node_capacity in "this is allocatable capacity on the node, not node_capacity." Do you refer to a specific resource field ?

I agree, that your comment that init containers resource requirements should be mentioned here. We have a detailed explanation of resource requirements for init-containers in the"Init Container" pattern (i.e. the top paragraph on p. 127), but we should mention that here for sure, too.

... roland

+1 on the InitContainer.

Regarding node allocatable vs node capacity: minor detail, but worth mentioning I think (correctness and clarity). For scheduling and placement, not the node's capacity but allocatable resources are used -> https://kubernetes.io/docs/tasks/administer-cluster/reserve-compute-resources/#node-allocatable