Kubernetes Commands

KUBECTL COMMANDS

To check the version:

kubectl version
kubectl version --output=yaml

To check info about the cluster

kubectl config view

To run a Pod

kubectl run <pod name> --image <image name>
kubectl run myngix --image nginx

To create a deployment

kubectl create deployment <name> --image <image name>
kubectl create deployment mynginx --image nginx

To scale the deployment (increase replicas)

kubectl scale deployment <deployment name> --replicas <no of replicas>
kubectl scale deployment mynginx --replicas 2

To check all running services, pods, etc.

kubectl get all

To get the get details from the a particular namespace

kubectl get all -n <namespace name>

To get the internal components running

kubectl get pods -A 
kubectl get pods -A -owide

To check all the running services

kubectl get services

To check all the running pods

kubectl get pods

// with extra details
kubectl get pods -o wide

To check all the running node.

kubectl get nodes

To check all the replicaset

kubectl get replicaset

To check all the namespaces

kubectl get namespaces

To get all the API resources

kubectl api-resources

To delete the deployment

kubectl delete deployment <deployment-name>

To delete the pods

kubectl delete pod <pod-name>

To delete evicted pods

kubectl delete pod --field-selector="status.phase==Failed"

To get logs of a pod

kubectl logs <pod-name>

To check logs or sh/bash of a container inside a pod. That if pods have multiple container an we have enter inside a container

kube exec -it <pod-name> -c <container-name> -- <bash command>
kube exec -it multi-container -c nginx-container -- curl localhost
kube exec -it multi-container -c nginx-container -- sh
kubectl logs multi-container -c nginx-container

To get inside the pod

kubectl exec -it <pod name> -- sh
kubectl exec -it nginx -- sh

Get a deep details/state chnages about a pod

kube describe pod <pod -name>

To watch the pods (watch refresh every few seconds)

kubectl get pods -w

To check the cluster are avilable

kube config get-contexts

We can create namespace by

kubectl create namespace <name>
kubectl create namespace dev

To do a dry nun and get the output as Yaml

kubectl create namespace test-name --dry-run=client -oyaml

To edit the deployment (deployment file)

kubectl edit deployment <deployment name>

To delete all the pods

kubectl delete pods --all

Apply to a particular namespace

kubectl apply -f <config file name> --namespace=<namespace name>

Persistent Volume

Get all the PersistentVolume

kubectl get pv

Get all the PersistentVolumeClaim (tied to a namespace)

kubectl get pvc

To chnage default/active namespace

kubectl config set-context --current --namespace=<namespace name>

To get the details of a particular namespace

kubectl get all -n <namespace name>

Persistent Volume​

Persistent Volume