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

Chapter 9 ■ Scheduling Pods on Nodes
Figure 9-27. The pod is scheduled on the first node it finds with the matching label
Next, we shall demonstrate that if a node with a matching label is not found, the pod is not scheduled at
all. We need to delete all the labels, as we shall be using the same definition files for pods and with the same
nodeSelector field settings. Delete the label added previously to each of the nodes:
kubectl label nodes ip-10-0-0-151.ec2.internal kubernetes.io/image-name
kubectl label nodes ip-10-0-0-152.ec2.internal kubernetes.io/image-name
kubectl label nodes ip-10-0-0-153.ec2.internal kubernetes.io/image-name
The node labels are removed, even though the command output indicates that the node was labeled, as
shown in Figure 9-28. Removing a node label is also considered labeling a node.
Figure 9-28. Removing node labels
List the nodes, including labels, and the node labels should not include the labels added previously, as
shown in Figure 9-29.
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