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Resources

kubectl api-resources

Quick Commands

kubectl get all -n dev

kubectl delete all --all

watch -n 1 'kubectl get all -n dev'

watch -n 1 'kubectl get pods -n dev'

watch -n 1 'kubectl get svc -n dev'

kubectl logs $(kubectl get pods -n dev| grep -i 'kafka' | awk '{print $1}') -n dev -f

kubectl delete pod $(kubectl get pods -n dev| grep -i 'kafka' | awk '{print $1}') -n dev -f

Cluster

kubectl cluster-info

kubectl get componentstatuses

Nodes

kubectl get nodes

kubectl get nodes -o wide 

kubectl describe node <NODE_NAME>

Managing Nodes

Drain

kubectl drain <NODE_NAME> --ignore-daemonsets
  • Add --delete-emptydir-data to delete pods using emptyDir

unschedulable

kubectl cordon <NODE_NAME>

schedulable (undo cordon)

kubectl uncordon <NODE_NAME>

Labeling

Add a label

kubectl label nodes <NODE_NAME> <LABEL_KEY>=<LABEL_VALUE>

Remove a label from a node

kubectl label nodes <NODE_NAME> <LABEL_KEY>-

Annotation

kubectl annotate nodes <NODE_NAME> <ANNOTATION_KEY>=<ANNOTATION_VALUE>

Namespace

kubectl create namespace <NAMESPACE_NAME>

kubectl get namespaces

kubectl describe namespace <NAMESPACE_NAME>

kubectl delete namespace <NAMESPACE_NAME>

Deployments

kubectl create deployment <DEPLOYMENT_NAME> --image=<IMAGE_NAME>

kubectl get deployments

kubectl describe deployment <DEPLOYMENT_NAME>

kubectl delete deployment <DEPLOYMENT_NAME>

Deployment Advanced

kubectl scale deployment <DEPLOYMENT_NAME> --replicas=3

kubectl set image deployment/<DEPLOYMENT_NAME> mycontainer=<new_IMAGE_NAME>

kubectl expose deployment <DEPLOYMENT_NAME> --type=LoadBalancer --name=<SERVICE_NAME>

Deployment Rollouts

To record an resource change in deployment file use --record

kubectl <COMMAND_TO_CHANGE_ANY_RESOURCE> --record

kubectl rollout history deployment/<DEPLOYMENT_NAME>

kubectl rollout undo deployment/<DEPLOYMENT_NAME>

kubectl rollout undo deployment/<DEPLOYMENT_NAME> --to-revision=<REVISION>

Pod

kubectl get pods

kubectl get pods -o wide

kubectl get pods --show-labels

kubectl get pods -l <LABEL_1>,<LABEL_2>

kubectl describe pod <POD_NAME>

kubectl delete pod <POD_NAME>

Service

kubectl get services

kubectl describe service <SERVICE_NAME>

kubectl delete service <SERVICE_NAME>

Replicaset

kubectl get rs

kubectl get rs <REPLICASET_NAME> -o yaml

kubectl get rs <REPLICASET_NAME> -o json

kubectl describe rs <REPLICASET_NAME>

kubectl delete rs <REPLICASET_NAME>

ReplicaSet advanced

Scale

kubectl scale rs <REPLICASET_NAME> --replicas=5

Edit the ReplicaSet directly

kubectl edit rs <REPLICASET_NAME>

View events related to the ReplicaSet

kubectl get events --field-selector involvedObject.kind=ReplicaSet

List all pods created by the specific ReplicaSet

kubectl get pods --selector=<SELECTOR>

example

kubectl get pods --selector=app=my-app

ConfigMap

kubectl create configmap <CONFIG_NAME> --from-literal=key1=value1 --from-literal=key2=value2

kubectl get configmaps

kubectl describe configmap <CONFIG_NAME>

kubectl delete configmap <CONFIG_NAME>

Secrets

kubectl get secrets

kubectl create secret generic <SECRET_NAME> --from-literal=username=myuser --from-literal=password=mypass

kubectl describe secret <SECRET_NAME>

kubectl delete secret <SECRET_NAME>

Persistent Volume

kubectl get pv

kubectl get pvc

kubectl describe pv <PV_NAME>

Logs

kubectl logs <POD_NAME> -f

kubectl logs <POD_NAME> -c <CONTAINER_NAME>

Exec

kubectl exec -it <POD_NAME> sh

Port Forward

kubectl port-forward <POD_NAME> <FORWARD_PORT>:<ACTUAL_PORT>

Minikube Commands

minikube start --nodes 2 -p local-cluster --driver=docker

minikube status -p local-cluster

minikube node add --worker -p local-cluster

minikube node delete <NODE_NAME> -p local-cluster

minikube dashboard --url -p local-cluster