Difference between revisions of "Kubernetes pod affinity and anti affinity"
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https://kubernetes.io/docs/concepts/scheduling-eviction/assign-pod-node/#affinity-and-anti-affinity | https://kubernetes.io/docs/concepts/scheduling-eviction/assign-pod-node/#affinity-and-anti-affinity | ||
| − | + | * Elasticsearch <code>[[PodAntiAffinity]]</code> official example | |
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| + | 0/11 nodes are available: 1 [[Insufficient cpu]], 1 Too many pods, 10 nodes(s) didn't match Pod's node [[affinity]]/selector | ||
| + | 0/2 nodes are available: 1 Too many pods, 1 nodes(s) [[didn't match Pod's node affinity/selector]] | ||
| + | 0/24 nodes are available: 0/24 [[nodes are available]]: 1 node(s) [[didn't match pod anti-affinity rules]], 1 node(s) [[were unschedulable]], 2 node(s) [[had taint]] {[[node.kubernetes.io/not-ready]]}, that the pod did not tolerate, 20 node(s) [[didn't match Pod's node affinity/selector]]. | ||
| − | + | Too many pods, 1 nodes(s) [[didn't match Pod's node affinity/selector]] | |
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| − | + | == Official examples == | |
| + | https://raw.githubusercontent.com/kubernetes/website/main/content/en/examples/pods/pod-with-node-affinity.yaml | ||
| − | + | [[apiVersion]]: v1 | |
| + | [[kind:]] [[Pod]] | ||
| + | [[metadata]]: | ||
| + | name: [[with-node-affinity]] | ||
| + | spec: | ||
| + | [[affinity:]] | ||
| + | [[nodeAffinity]]: | ||
| + | requiredDuringSchedulingIgnoredDuringExecution: | ||
| + | [[nodeSelectorTerms]]: | ||
| + | - [[matchExpressions]]: | ||
| + | - [[key:]] [[topology.kubernetes.io/zone]] | ||
| + | operator: In | ||
| + | values: | ||
| + | - antarctica-east1 | ||
| + | - antarctica-west1 | ||
| + | preferredDuringSchedulingIgnoredDuringExecution: | ||
| + | - weight: 1 | ||
| + | [[preference:]] | ||
| + | [[matchExpressions]]: | ||
| + | - key: another-node-label-key | ||
| + | operator: In | ||
| + | [[values]]: | ||
| + | - another-node-label-value | ||
| + | [[containers]]: | ||
| + | - name: with-node-affinity | ||
| + | image: registry.k8s.io/pause:2.0 | ||
| + | apiVersion: v1 | ||
| + | kind: Pod | ||
| + | metadata: | ||
| + | name: with-pod-affinity | ||
| + | spec: | ||
| + | affinity: | ||
| + | podAffinity: | ||
| + | requiredDuringSchedulingIgnoredDuringExecution: | ||
| + | - labelSelector: | ||
| + | matchExpressions: | ||
| + | |||
| + | - key: security | ||
| + | |||
| + | operator: In | ||
| + | |||
| + | values: | ||
| + | |||
| + | - S1 | ||
| + | |||
| + | topologyKey: topology.kubernetes.io/zone | ||
| + | |||
| + | [[podAntiAffinity]]: | ||
| + | |||
| + | preferredDuringSchedulingIgnoredDuringExecution: | ||
| + | |||
| + | - weight: 100 | ||
| + | |||
| + | podAffinityTerm: | ||
| + | |||
| + | labelSelector: | ||
| + | |||
| + | matchExpressions: | ||
| + | |||
| + | - key: [[security]] | ||
| + | |||
| + | operator: In | ||
| + | |||
| + | values: | ||
| + | |||
| + | - [[S2]] | ||
| + | |||
| + | topologyKey: topology.kubernetes.io/zone | ||
| + | |||
| + | containers: | ||
| + | |||
| + | - name: with-pod-affinity | ||
| + | |||
| + | [[image]]: registry.k8s.io/pause:2.0 | ||
| − | + | == Related == | |
| + | * [[Kubernetes Pod Topology Spread Constraints]] | ||
| + | * <code>[[default-scheduler]]</code> | ||
| + | * [[Volume node affinity conflict]] | ||
| + | * [[taints]], [[Node taints]] | ||
| + | * [[spec.NodeSelector]] | ||
| − | + | == Activities == | |
| + | * https://aws.amazon.com/about-aws/whats-new/2022/04/amazon-eks-karpenter-v0-9-0-pod-affinity/ | ||
| − | + | == See also == | |
| + | * {{K8s affinity}} | ||
| + | * {{K8s pods}} | ||
| + | * {{Karpenter}} | ||
| − | + | [[Category:K8s]] | |
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Latest revision as of 07:23, 25 July 2024
https://kubernetes.io/docs/concepts/scheduling-eviction/assign-pod-node/#affinity-and-anti-affinity
- Elasticsearch
PodAntiAffinityofficial example
0/11 nodes are available: 1 Insufficient cpu, 1 Too many pods, 10 nodes(s) didn't match Pod's node affinity/selector 0/2 nodes are available: 1 Too many pods, 1 nodes(s) didn't match Pod's node affinity/selector 0/24 nodes are available: 0/24 nodes are available: 1 node(s) didn't match pod anti-affinity rules, 1 node(s) were unschedulable, 2 node(s) had taint {node.kubernetes.io/not-ready}, that the pod did not tolerate, 20 node(s) didn't match Pod's node affinity/selector.
Too many pods, 1 nodes(s) didn't match Pod's node affinity/selector
Official examples[edit]
https://raw.githubusercontent.com/kubernetes/website/main/content/en/examples/pods/pod-with-node-affinity.yaml
apiVersion: v1 kind: Pod metadata: name: with-node-affinity spec: affinity: nodeAffinity: requiredDuringSchedulingIgnoredDuringExecution: nodeSelectorTerms: - matchExpressions: - key: topology.kubernetes.io/zone operator: In values: - antarctica-east1 - antarctica-west1 preferredDuringSchedulingIgnoredDuringExecution: - weight: 1 preference: matchExpressions: - key: another-node-label-key operator: In values: - another-node-label-value containers: - name: with-node-affinity image: registry.k8s.io/pause:2.0 apiVersion: v1 kind: Pod metadata: name: with-pod-affinity spec: affinity: podAffinity: requiredDuringSchedulingIgnoredDuringExecution: - labelSelector: matchExpressions: - key: security operator: In values: - S1 topologyKey: topology.kubernetes.io/zone podAntiAffinity: preferredDuringSchedulingIgnoredDuringExecution: - weight: 100 podAffinityTerm: labelSelector: matchExpressions: - key: security operator: In values: - S2 topologyKey: topology.kubernetes.io/zone containers: - name: with-pod-affinity image: registry.k8s.io/pause:2.0
Related[edit]
- Kubernetes Pod Topology Spread Constraints
default-scheduler- Volume node affinity conflict
- taints, Node taints
- spec.NodeSelector
Activities[edit]
See also[edit]
- Kubernetes pod affinity and anti affinity, Kubernetes Node Affinity,
default-scheduler, affinity:, NodeAffinity, spec.affinity.podAntiAffinity - Pods:
kubectl apply,kubectl [ pod get | top | delete | describe pods ],InitContainers, PodInitializing, CrashLoopBackOff, ImagePullPolicy:, NodeAffinity, NodeSelector, Terminated - Karpenter,
karpenter.sh, provisioners.karpenter.sh, Karpenter releases, best practices,karpenter.sh/capacity-type, karpenter.sh/discovery,kind: Provisioner, kind: AWSNodeTemplate,kubectl provisioner,TopologyKey, FailedDraining, Evict, DisruptionBlocked, Karpenter logs,controller., ttlSecondsUntilExpired, KEDA, NodePools, Kind: NodePool, Workload Consolidation, Disruption controls
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