148422597X Kubernetes Management Design Patterns [Vohra 2017-01-29] {E559F6BB}

Chapter 9 ■ Scheduling Pods on Nodes
Figure 9-19. Labeling nodes
List the nodes, including the labels, using the –show-labels command argument to the kubectl get
nodes command. The labels added are listed in addition to the default labels, as shown in Figure 9-20.
Figure 9-20. Listing nodes including labels
When using labels to match pods with nodes, one of the following results:
1. The pod is scheduled on the labeled node.
2. The pod is scheduled on an unlabeled node if a node affinity is specified.
3. The pod is not scheduled.
We shall discuss each of these in the following sections using the labeled and unlabeled nodes from this
section.
Scheduling Pods with a Node Selector
The nodeSelector field in a pod’s specification may be used to explicitly select a node for a pod. To assign a
pod to a label, create a pod definition file pod-nginx.yaml. Copy the following code to the definition file:
apiVersion: v1
kind: Pod
metadata:
name: nginx
labels:
env: test
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