How deeply does Effective Platform Engineering cover affinity?

Defines label-based placement and shows a required scheduling manifest, but does not detail scheduler internals.

Affinity

As explained in Effective Platform Engineering

Node affinity is a Kubernetes scheduling constraint that attracts pods to nodes matching specified labels.

Node affinity is a Kubernetes scheduling constraint that attracts pods to nodes matching specified labels, such as a management role or hardware characteristic. section 7.4.6

Configure affinity with label selectors in the pod YAML. Unlike tolerations, which allow placement onto tainted nodes, affinity pulls workloads toward nodes with desired labels; together they provide fine-grained placement control. section 7.4.6

Pin a storage test pod to management nodes

Set requiredDuringSchedulingIgnoredDuringExecution with a nodeSelectorTerm matching node.kubernetes.io/role=management. The accompanying toleration permits placement on management nodes tainted with dedicated=management:NoSchedule.

Validate the placement pattern by:

Deploying the pod with the EBS volume fixture. section 7.4.6
Deleting all deployed test resources after verification. section 7.4.6

How Effective Platform Engineering covers it

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Also explained in

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Google Anthos in ActionNode affinity is a Kubernetes scheduling constraint that selects nodes through label expressions and required or preferred matching behavior.
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Kubernetes in Action, Second EditionNode affinity is a Kubernetes pod-scheduling rule that constrains placement to nodes matching specified node attributes.
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Acing the Certified Kubernetes Administrator Exam, Second EditionNode affinity is a Kubernetes scheduling technique that expresses preferences or requirements for placing pods on nodes.
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Kubernetes for DevelopersNode affinity is a Kubernetes scheduling constraint that requires or prefers placing a Pod on nodes whose labels match specified expressions.
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Machine Learning Platform EngineeringA Kubernetes affinity configuration expresses scheduling preferences or requirements that influence which nodes may run a pod.

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Related concepts

node selectorcontrasts with · A node selector is a Kubernetes scheduling constraint that restricts a pod or workload to nodes having specified matching labels.
anti-affinitycontrasts with · Anti-affinity is a scheduling constraint that discourages or prevents selected workloads from sharing a node or topology domain with matching workloads.
Kubernetes scheduleruses · The Kubernetes scheduler is a control-plane component that assigns unscheduled Pods to suitable nodes according to resource requirements and scheduling constraints.
Kubernetesused by · Kubernetes is an open-source platform for orchestrating and automating the deployment, scaling, and management of containerized workloads across computing clusters.
podconfigures · A Kubernetes Pod is the smallest deployable unit in Kubernetes, grouping one or more co-located containers that share networking and other resources.

This explainer was generated by Manning's knowledge graph from the text of Effective Platform Engineering. The section links point to the parts of the book it draws on.