100 Essential kubectl Commands to Master Kubernetes (PDF Included)

Cluster Information

Show Kubernetes version: kubectl version Show cluster info: kubectl cluster-info List all nodes: kubectl get nodes Describe a specific node: kubectl describe node <node-name> List all namespaces: kubectl get namespaces List all pods in all namespaces:

kubectl get pods --all-namespaces

Pod Diagnosis

List pods in a namespace: kubectl get pods -n <namespace> Describe a pod: kubectl describe pod <pod-name> -n <namespace> View pod logs: kubectl logs <pod-name> -n <namespace> Tail pod logs: kubectl logs -f <pod-name> -n <namespace> Execute a command in a pod:

kubectl exec -it <pod-name> -n <namespace> -- <command>

Pod Health Check

Check pod readiness:

kubectl get pods <pod-name> -n <namespace> -o jsonpath='{.status.conditions[?(@.type=="Ready")].status}'

Check pod events:

kubectl get events -n <namespace> --field-selector involvedObject.name=<pod-name>

Service Diagnosis

List services in a namespace: kubectl get svc -n <namespace> Describe a service:

kubectl describe svc <service-name> -n <namespace>

Deployment Diagnosis

List deployments in a namespace: kubectl get deployments -n <namespace> Describe a deployment:

kubectl describe deployment <deployment-name> -n <namespace>

Check rollout status:

kubectl rollout status deployment/<deployment-name> -n <namespace>

View rollout history:

kubectl rollout history deployment/<deployment-name> -n <namespace>

StatefulSet Diagnosis

List StatefulSets in a namespace: kubectl get statefulsets -n <namespace> Describe a StatefulSet:

kubectl describe statefulset <statefulset-name> -n <namespace>

ConfigMap and Secret Diagnosis

List ConfigMaps: kubectl get configmaps -n <namespace> Describe a ConfigMap:

kubectl describe configmap <configmap-name> -n <namespace>

List Secrets: kubectl get secrets -n <namespace> Describe a Secret:

kubectl describe secret <secret-name> -n <namespace>

Namespace Diagnosis

Describe a namespace:

kubectl describe namespace <namespace-name>