How can you specify which node to start a pod on in k8s?

2 years ago
Liam
1 minute

In Kubernetes, you can specify the node on which a Pod should start by using nodeSelector or nodeName.

  1. chooseNode
  2. give me the specifications
  3. nodeSelector refers to selecting nodes in a Kubernetes cluster based on specific attributes or labels.
apiVersion: v1
kind: Pod
metadata:
  name: my-pod
spec:
  containers:
  - name: my-container
    image: my-image
  nodeSelector:
    disk: ssd

In the example above, the nodeSelector field will select nodes with the disk=ssd label to start the Pod.

  1. The name of the node
  2. description
  3. What is the name of the node?
apiVersion: v1
kind: Pod
metadata:
  name: my-pod
spec:
  containers:
  - name: my-container
    image: my-image
  nodeName: my-node

In the example above, the Pod will be launched on a node named my-node.

Please note that using the nodeName field will cause the Pod to ignore any node selector, and if the specified node does not exist or is unavailable, the Pod will be in a pending state until the node becomes available. Therefore, when using the nodeName field, make sure the specified node is correctly available.

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