kubectl apply

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kubectl apply apply a configuration to a resource by filename or stdin [1]

kubectl apply --help

kubectl apply -f https://k8s.io/examples/application/mysql/mysql-pv.yaml
persistentvolume/mysql-pv-volume created
persistentvolumeclaim/mysql-pv-claim created



kubectl apply -f ./file.yaml
Error from server (InternalError): error when creating "./file.yaml": Internal error occurred: failed calling webhook "virtualmachines- mutator.kubevirt.io": Post https://virt-api.kubevirt.svc:443/virtualmachines-mutate?timeout=30s: service "virt-api" not found
  Warning: resource configmaps/kube-root-ca.crt is missing the kubectl.kubernetes.io/last-applied-configuration annotation which is required by kubectl apply. kubectl apply should only be used on resources created declaratively by either kubectl create --save-config or kubectl apply. The missing annotation will be patched automatically. secret/default-token-7z4zd created
Error from server (Conflict): error when applying patch:
Resource: "/v1, Resource=configmaps", GroupVersionKind: "/v1, Kind=ConfigMap"
Name: "kube-root-ca.crt", Namespace: "your-namespace"
for: "your.yaml": Operation cannot be fulfilled on configmaps "kube-root-ca.crt": the object has been modified; please apply your changes to the latest version and try again


See also[edit]

  • https://kubernetes.io/docs/reference/generated/kubectl/kubectl-commands#apply
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