Kubernetes Commands

kubernetes.md

Kubernetes Commands

Kubectl

It is a kubernetes command line tool. It controls the Kubernetes cluster manager. It allows to run commands against our cluster.

• kubectl version - show the client and server version info
• kubectl api-resources - show all Kubernetes resources
• kubectl run hello-nginx --image=nginx:latest --port=80 - start a nginx pod, let the container expose port 80
• kubectl get pod hello-nginx -o wide - show one-liner info about the pod
• kubectl describe pod hello-nginx - show info about the pod
• kubectl describe deployment hello-nginx - show info about deployment 'hello-nginx'
• kubectl exec -it hello-nginx -- sh - SSH into the container (if 1 container in the pod)
• kubectl exec -it hello-nginx -c hello-kenny -- sh - SSH into the container 'hello-kenny' (if many containers in the pod)
• kubectl exec hello-nginx -- ls /var - execute command in the container
• kubectl get events --sort-by=.metadata.creationTimestamp - show logs to find a reason of problem with ContainerCreating Status
• kubectl get namespaces - show all namespaces
• kubectl get nodes - show nodes in the cluster
• kubectl get pods - show running pods
• kubectl get pod -n kube-system - show pods in the namespace
• kubectl get pods -A - show all pods in all namespaces
• kubectl get all -A - show everything in all namespases
• kubectl get deployments - show deployments
• kubectl delete deployment hello-nginx - delete deployment 'hello-nginx'
• kubectl get replicaset, kubectl get rs - show replicasets
• kubectl logs hello-nginx - show logs of the default container
• kubectl logs hello-nginx -c hello-kenny - show logs of the container 'hello-kenny' within the pod 'hello-nginx'
• kubectl port-forward pod/hello-nginx 8080:80 - forward port 8080 from host to port 80 in the container
• kubectl delete pod hello-nginx - delete pod
• kubectl apply -f hello-nginx.yml - create pod from .yml file
• kubectl replace --force -f deployment.yml - apply changes from .yml file in forced mode
• kubectl delete -f hello-nginx.yml - delete pod
• kubectl rollout history deployment - show deployments history
• kubectl rollout history deployment hello-nginx --revision=2 - show info about specific deployment revision
• kubectl rollout undo deployment hello-nginx - rollback deployment hello-nginx
• kubectl rollout status deployment hello-nginx - show info about rollout status

Minikube

• minikube config set driver docker - set docker as default driver
• minikube start - start a local Kubernetes cluster
• minikube start --alsologtostderr --v=2 - start minikube and output all the important debug logs to stderr
• minikube start --vm-driver hyperv - start minikube using HyperV instead default VirtualBox driver
• minikube start --nodes=2 - start cluster with 2 nodes
• minikube dashboard - access the Kubernetes dashboard running within the minikube cluster
• minikube node add - add node to an existing cluster
• minikube node delete m02 - delete node with name m02 from cluster
• minikube stop - stop a running local Kubernetes cluster
• minikube delete - delete a local Kubernetes cluster
• minikube delete --all - delete all local clusters and profiles
• minikube status - show the status of a local Kubernetes cluster
• minikube ssh - SSH into the node
• minikube ip - shows the IP of master node
• minikube ip --node=minikube-m02 - show the IP of node
• minikube node list - lists nodes
• minikube logs --node minikube-m02 -f - show logs of the node, -f - following
• minikube image build -t local/customer:1 . - build image with minikube