by deafult,Scheduler will schedule Pods to all available Nodes.
But in some situations,we will deploy Pod to assigned Node such as deploying using I/O’s Pod to Node with SSD,using GPU’s Pod to Node with GPU.
Using label,k8s solves this.
label is the pair of key-value .
kubectl label node k8s-0002 disktype=ssd
kubectl get node --show-labels
we can use the type to deploy Pod to assigned Node
spec 's nodeSelector to set the ssd Node
the Pod is running on k8s-0002 Node
delete the label