What is the method for deploying specific nodes in Kubernetes?

In Kubernetes, there are several methods available to specify the deployment of applications on nodes.

1. Node Selector is utilized by setting the nodeSelector field in the Pod’s configuration file to specify on which nodes you want the Pod to be scheduled. For instance, you can add the following field in the Pod’s configuration file to specify the node deployment:

spec:
  nodeSelector:
    key: value

In this case, the key and value are custom label key-value pairs used to match the labels of nodes. Only nodes with matching labels will be selected by the scheduler to deploy the Pod.

1. natural liking or connection

spec:
  affinity:
    nodeAffinity:
      requiredDuringSchedulingIgnoredDuringExecution:
        nodeSelectorTerms:
        - matchExpressions:
          - key: key
            operator: In
            values:
            - value

In this case, key and value are custom label key-value pairs used to match the labels of the nodes. Only nodes with matching labels will be selected by the scheduler to deploy the Pod.

1. Utilize Node Affinity: Node Affinity is an advanced node scheduling technique that allows for controlling the scheduling of Pods based on the attributes and states of nodes. You can specify node deployment by adding the following field in the Pod’s configuration file.

spec:
  affinity:
    nodeAffinity:
      requiredDuringSchedulingIgnoredDuringExecution:
        nodeSelectorTerms:
        - matchExpressions:
          - key: key
            operator: In
            values:
            - value

The key and value are custom tag key-value pairs used to match the tags of the nodes. Only nodes with matching tags will be selected by the scheduler to deploy the Pod.

The above are several commonly used methods for deploying specified nodes. The choice of method depends on the actual requirements and scenarios.