Скачать или смотреть Assigning Pods to Nodes | Affinity and anti-affinity

What is Node Affinity and Node Anti Affinity?
What is Scheduling Decisions?

You can constrain a Pod so that it is restricted to run on particular node(s), or to prefer to run on particular nodes. There are several ways to do this and the recommended approaches all use label selectors to facilitate the selection. Often, you do not need to set any such constraints; the scheduler will automatically do a reasonable placement (for example, spreading your Pods across nodes so as not place Pods on a node with insufficient free resources). However, there are some circumstances where you may want to control which node the Pod deploys to, for example, to ensure that a Pod ends up on a node with an SSD attached to it, or to co-locate Pods from two different services that communicate a lot into the same availability zone.

You can use any of the following methods to choose where Kubernetes schedules specific Pods:

nodeSelector field matching against node labels
Affinity and anti-affinity
nodeName field
Pod topology spread constraints

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00:00 Precap
00:31 Intro
01:04 Node Affinity
04:44 Node Anti Affinity
06:53 Real world Application example
08:40 Conclusion