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K8S
Général
Show deployment definition 
kubectl get deploy myapp -o yaml

Shows the full YAML manifest of the resource.
List nodes with labels 
kubectl get nodes --show-labels

Displays nodes and their labels.
List all pods 
kubectl get pods -A

Shows all pods across all namespaces with status.
List all available APIs 
kubectl api-resources

Shows all Kubernetes API resources.
List all namespace resources 
kubectl api-resources --verbs=list --namespaced -o name | xargs -n 1 kubectl get --show-kind --ignore-not-found -n my-namespace

Displays all active resources in the namespace.
Port-forward a service 
kubectl port-forward svc/myapp 8080:80

Allows local access to the service port.
Debug
Debug pod with ephemeral container 
kubectl debug pod/mypodName -it --image=busybox

Provides interactive debugging inside the pod.
List pods sorted by CPU 
kubectl top pod --sort-by=cpu

Displays highest CPU-consuming pods.
Logs from crashed pod 
kubectl logs podName --previous
kubectl logs -p podName

Shows logs from the last terminated container.
Show recent events 
kubectl get events --sort-by=.metadata.creationTimestamp

Displays recent cluster events.
Delete
Delete failed pods 
kubectl delete pod --field-selector=status.phase=Failed

Deletes pods in Failed status.
Delete all namespace resources 
kubectl delete all --all -n test

Deletes all resources inside the namespace.
Deployment
Apply manifest 
kubectl apply -f deployment.yaml

Creates or updates resources from a YAML file.
Restart deployment 
kubectl rollout restart deploy myapp

Forces pod restart for deployment.
Execute
Execute command in container 
kubectl exec -it mypodName -c nginx -- bash

Opens an interactive shell inside a container.
Execute command in pod 
kubectl exec -it podName -- bash

Opens an interactive shell in a pod.