Difference between revisions of "Spec.NodeSelector"
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| + | {{lc}} | ||
| + | * https://www.eksworkshop.com/beginner/140_assigning_pods/node_selector/ | ||
| + | * https://kubernetes.io/docs/tasks/configure-pod-container/assign-pods-nodes/#create-a-pod-that-gets-scheduled-to-your-chosen-node | ||
[[apiVersion]]: v1 | [[apiVersion]]: v1 | ||
[[kind: Pod]] | [[kind: Pod]] | ||
| Line 7: | Line 10: | ||
env: test | env: test | ||
spec: | spec: | ||
| − | containers: | + | [[containers:]] |
- name: nginx | - name: nginx | ||
image: nginx | image: nginx | ||
imagePullPolicy: IfNotPresent | imagePullPolicy: IfNotPresent | ||
| − | nodeSelector: | + | [[nodeSelector:]] |
| − | disktype: ssd | + | [[disktype]]: ssd |
| + | |||
| + | <pre> | ||
| + | apiVersion: v1 | ||
| + | |||
| + | kind: Pod | ||
| + | |||
| + | metadata: | ||
| + | |||
| + | name: nginx | ||
| + | |||
| + | spec: | ||
| + | |||
| + | nodeName: foo-node # schedule pod to specific node | ||
| + | |||
| + | containers: | ||
| + | |||
| + | - name: nginx | ||
| + | |||
| + | image: nginx | ||
| + | |||
| + | imagePullPolicy: IfNotPresent | ||
| + | </pre> | ||
| + | |||
| + | == [[Karpenter]] == | ||
| + | nodeSelector: | ||
| + | [[topology.kubernetes.io/]]zone: us-west-2a | ||
| + | [[karpenter.sh/capacity-type]]: spot | ||
| + | |||
| + | nodeSelector: | ||
| + | [[karpenter.sh/provisioner-name:]] XXXXX | ||
| + | |||
| + | == DaemonSet == | ||
| + | Stop [[DaemonSet]] by appliying a [[nodeSelector]] | ||
| + | * <code>[[kubectl patch]] daemonset <name-of-daemon-set> -p '{"spec": {"template": {"spec": {"nodeSelector": {"non-existing": "true"}}}}}'</code> | ||
| + | Start [[DaemonSet]] by removing the [[nodeSelector]] : | ||
| + | * <code>kubectl patch daemonset <name-of-daemon-set> --type json -p='[{"op": "remove", "path": "[[/spec/template/spec/nodeSelector/]]non-existing"}]'</code> | ||
== Activities == | == Activities == | ||
| + | * [[CKA v1.21: Understand how to use Labels, Selector and Annotations]] | ||
* [[CKA v1.18]]: Use [[label]] selectors to [[schedule Pods]] | * [[CKA v1.18]]: Use [[label]] selectors to [[schedule Pods]] | ||
| − | * [[CKA | + | * [[CKA v1.15: Understand how to use Labels, Selector and Annotations]] |
| + | * Use <code>NodeSelector</code> assign [[pod]] to specific [[node]] | ||
== Related terms == | == Related terms == | ||
| Line 22: | Line 63: | ||
* <code>[[kubectl label]]</code> | * <code>[[kubectl label]]</code> | ||
* <code>[[kubectl apply]]</code> | * <code>[[kubectl apply]]</code> | ||
| + | * <code>[[nodeAffinity]]</code> | ||
| + | * [[Kubernetes Pod Topology Spread Constraints]] | ||
| + | * <code>[[selector:]]</code> | ||
== See also == | == See also == | ||
| − | * {{K8s}} | + | * {{K8s nodes}} |
| + | * {{Pods}} | ||
| + | * {{affinity}} | ||
[[Category:Kubernetes]] | [[Category:Kubernetes]] | ||
Latest revision as of 07:22, 25 July 2024
apiVersion: v1 kind: Pod metadata: name: nginx labels: env: test spec: containers: - name: nginx image: nginx imagePullPolicy: IfNotPresent nodeSelector: disktype: ssd
apiVersion: v1
kind: Pod
metadata:
name: nginx
spec:
nodeName: foo-node # schedule pod to specific node
containers:
- name: nginx
image: nginx
imagePullPolicy: IfNotPresent
Karpenter[edit]
nodeSelector: topology.kubernetes.io/zone: us-west-2a karpenter.sh/capacity-type: spot
nodeSelector: karpenter.sh/provisioner-name: XXXXX
DaemonSet[edit]
Stop DaemonSet by appliying a nodeSelector
kubectl patch daemonset <name-of-daemon-set> -p '{"spec": {"template": {"spec": {"nodeSelector": {"non-existing": "true"}}}}}'
Start DaemonSet by removing the nodeSelector :
kubectl patch daemonset <name-of-daemon-set> --type json -p='[{"op": "remove", "path": "/spec/template/spec/nodeSelector/non-existing"}]'
Activities[edit]
- CKA v1.21: Understand how to use Labels, Selector and Annotations
- CKA v1.18: Use label selectors to schedule Pods
- CKA v1.15: Understand how to use Labels, Selector and Annotations
- Use
NodeSelectorassign pod to specific node
Related terms[edit]
- Kubernetes scheduling
kubectl labelkubectl applynodeAffinity- Kubernetes Pod Topology Spread Constraints
selector:
See also[edit]
- Kubernetes nodes,
node.kubernetes.ioK8s Node controller (node-controller),MemoryPressure, DiskPressure, NodeHasDiskPressure, events, NodeNotReady, Node-pressure Eviction, RemovingNode, ProviderID,kubectl node-shell, kubectl describe nodes - Pods:
kubectl apply,kubectl [ pod get | top | delete | describe pods ],InitContainers, PodInitializing, CrashLoopBackOff, ImagePullPolicy:, NodeAffinity, NodeSelector, Terminated - Kubernetes pod affinity and anti affinity, Kubernetes Node Affinity,
default-scheduler, affinity:, NodeAffinity, spec.affinity.podAntiAffinity
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