Question

I can roduce my replica?

Answer 1

When the replica count is increased, the new pod(s) are assigned to hosts by the scheduler based on policies defined by the selected predicates/priorities. However, during scale-down (reducing the replica count), the scheduler does not come into the picture potentially resulting in a violation of the scheduling policies. It is irrelevant whether the scale-down is automatic or manual.
Consider the case that there are 5 pods being spread across 3 machines, with 2 pods on each of the two machines and 1 pod on the third machine. If the replica count is reduced to 4, we shouldn't remove the single pod from the third machine (assuming the scheduler policy is to achieve greatest possible spread). To address this, we need to involve the scheduler in the workflow to figure out which pod(s) to get rid of.

Answer 2

Answer:

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