There are so many frameworks for managing Kubernetes Cluster easily. But still majority of the engineers interact with Kubernetes using the command line client – kubectl. I am listing a set of useful commands that we usually use in Kubernetes. This can be considered as a quick command reference.
If you are interested in learning more details about Kubernetes, you can refer to my previous article “Zero to Kubernetes in 30 minutes”.
Cluster
Command to get the list of nodes in the K8s cluster
kubectl get nodes
Command to get the memory and CPU utilization of the cluster nodes
kubectl top nodes
Command to check the Kubernetes client version and Server version
kubectl version
Command to get the details of a Kubernetes node
kubectl describe node [node-name]
Namespace
We can call namespace using the keywords ns or namespace
Command to list namespaces
kubectl get namespace
Command to describe a namespace
kubectl describe namespace [namespace-name]
Command to create a namespace
kubectl create namespace [namespace-name]
Command to delete a namespace and all objects in the namespace
kubectl delete namespace [namespace-name]
Kubernetes Pod
Command to list all the pods across all namespaces
kubectl get pods --all-namespaces
Command to list all the pods from a specific namespace
kubectl get pods -n [namespace]
Command to list the pods running in the default namespace
kubectl get pods
Command to check the CPU and Memory utilization of pods
kubectl top pods -n [namespace]
if you don’t specify the namespace, the command will list the memory and cpu utilization of the pods in the default namespace
Command to describe a Kubernetes Pod
kubectl describe pod [pod-name]
Command to print the logs from a pod
kubectl logs [pod-name] -n [namespace]
Command to stream the logs from a pod
kubectl logs -f [pod-name] -n [namespace]
Command to enter inside a pod or open the shell of a pod
kubectl exec -it [pod-name] -n [namespace] -- bash
Services
We can call services by using the keyword service or svc
Command to list services
kubectl get service -n [namespace]
Command to describe a service
kubectl describe service [service-name] -n [namespace]
Command to delete a service
kubectl delete service [service-name] -n [namespace]
Deployments
Command to list the deployments
kubectl get deployments -n [namespace]
Command to describe deployment
kubectl describe deployment [deployment] -n [namespace]
Command to delete a deployment
kubectl delete deployment [deployment] -n [namespace]
Volumes
Command to list all Persistent Volumes (PV)
kubectl get pv
Command to list Persistent Volume Claims (PVC)
kubectl get pvc
Command to delete a Persistent Volume (PV)
kubectl delete pv [volume-name]
Command to delete a Persistent Volume Claim (PVC)
kubectl delete pvc [persistent-volume-claim]
Command to describe a Persistent Volume (PV)
kubectl describe pv [persistent-volume-name]
Command to describe a Persistent Volume Claim (PVC)
kubectl describe pvc [persistent-volume-claim]
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