kubectl apply creates Kubernetes objects by posting YAML or JSON manifests to the Kubernetes API. It also updates existing objects when you edit the manifest and apply it again. section 5.2.2 section 7.1.2
Create a Pod from a manifest
Run `kubectl apply -f pod.kiada.yaml`. Kubernetes reports `pod "kiada" created`. To update it, edit the manifest and run the same command again. Some Pod fields are immutable; an update can therefore fail, requiring deletion and recreation. section 5.2.2
$ kubectl apply -f pod.kiada.yaml pod "kiada" created
Shows the minimal command-and-result cycle for creating an object from a manifest. section 5.2.2
Use the same manifest-oriented workflow for larger application definitions:
- Apply a more complex Pod manifest, then use kubectl get and kubectl describe to confirm that its containers launched. section 5.4.2
- Apply several files by separating filenames with commas, or apply all supported manifest files in a directory with `kubectl apply -f Chapter05/`. section 5.6.2
- Include Namespace objects in application manifests when deployment must create the required namespaces as part of the same setup. section 7.1.2
- Remove file-defined objects with `kubectl delete -f`; use `--recursive` when manifests are stored in subdirectories. section 5.6.2
