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| title | content_template | weight |
|---|---|---|
| Assign Pods to Nodes | templates/task | 120 |
{{% capture overview %}} This page shows how to assign a Kubernetes Pod to a particular node in a Kubernetes cluster. {{% /capture %}}
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{{< include "task-tutorial-prereqs.md" >}} {{< version-check >}}
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Add a label to a node
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List the nodes in your cluster:
kubectl get nodesThe output is similar to this:
NAME STATUS ROLES AGE VERSION worker0 Ready <none> 1d v1.12.0 worker1 Ready <none> 1d v1.12.0 worker2 Ready <none> 1d v1.12.0 -
Chose one of your nodes, and add a label to it:
kubectl label nodes <your-node-name> disktype=ssdwhere
<your-node-name>is the name of your chosen node. -
Verify that your chosen node has a
disktype=ssdlabel:kubectl get nodes --show-labelsThe output is similar to this:
NAME STATUS ROLES AGE VERSION LABELS worker0 Ready <none> 1d v1.12.0 ...,disktype=ssd,kubernetes.io/hostname=worker0 worker1 Ready <none> 1d v1.12.0 ...,kubernetes.io/hostname=worker1 worker2 Ready <none> 1d v1.12.0 ...,kubernetes.io/hostname=worker2In the preceding output, you can see that the
worker0node has adisktype=ssdlabel.
Create a pod that gets scheduled to your chosen node
This pod configuration file describes a pod that has a node selector,
disktype: ssd. This means that the pod will get scheduled on a node that has
a disktype=ssd label.
{{< codenew file="pods/pod-nginx.yaml" >}}
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Use the configuration file to create a pod that will get scheduled on your chosen node:
kubectl create -f https://k8s.io/examples/pods/pod-nginx.yaml -
Verify that the pod is running on your chosen node:
kubectl get pods --output=wideThe output is similar to this:
NAME READY STATUS RESTARTS AGE IP NODE nginx 1/1 Running 0 13s 10.200.0.4 worker0
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{{% capture whatsnext %}} Learn more about labels and selectors. {{% /capture %}}