Tutorials
Kubernetes Cheat Sheet
If you use minikube, instead of pushing your Docker image to a registry, you can simply build the image using the same Docker host as the Minikube VM, so that the images are automatically present.
To do this we need to make sure we are using the Minikube Docker daemon, you can do this by running the following:
eval $(minikube docker-env)
Later, when you no longer wish to use the Minikube host, you can undo this change by running:
eval $(minikube docker-env -u)
Viewing Resource Information
Nodes
kubectl get no
kubectl get no -o wide
kubectl describe no
kubectl get no -o yaml
kubectl get node --selector=[label_name]
kubectl get nodes -o jsonpath='{.items[*].status.addresses[?(@.type=="ExternalIP")].address}'
kubectl top node [node_name]
Pods
kubectl get po
kubectl get po -o wide
kubectl describe po
kubectl get po --show-labels
kubectl get po -l app=ngi nx
kubectl get po -o yaml
kubectl get pod [pod_name] -o yaml --export
kubectl get pod [pod_name] -o yaml --export > nameoffile.yaml
kubectl get pods --field-selector status. phase=Runni ng
# force delete pod
kubectl delete pods --all --grace-period=0 --force
Namespaces
kubectl get ns
kubectl get ns -o yaml
kubectl describe ns
Deployments
kubectl get deploy
kubectl describe deploy
kubectl get deploy -o wide
kubectl get deploy -o yaml
Services
kubectl get svc
kubectl describe svc
kubectl get svc -o wide
kubectl get svc -o yaml
kubectl get svc --show-labels
Daemon sets
kubectl get ds
kubectl get ds --all -namespaces
kubectl describeds [daemonset_name] -n [namespace_name]
kubectl get ds [ds_name] -n [ns_name] -o yaml
Events
kubectl get events
kubectl get events -n kube-system
kubectl get events -w
Logs
kubectl logs [pod_name]
kubectl logs --since=1h [pod_name]
kubectl logs --tail=20 [pod_name]
kubectl logs -f -c [container_name] [pod_name]
kubectl logs [pod_name] > pod.log
Service accounts
kubectl get sa
kubectl get sa -o yaml
kubectl get serviceaccounts default -o yaml > ./sa.yaml
kubectl replace serviceaccount default -f ./sa.yaml
Replica Sets
kubectl get rs
kubectl describe rs
kubectl get rs -o wide
kubectl get rs -o yaml
Roles
kubectl get roles --all -namespaces
kubectl get roles --all -namespaces -o yaml
Secrets
kubectl get secrets
kubectl get secrets --all -namespaces
kubectl get secrets -o yaml
Config maps
kubectl get cm
kubectl get cm --all -namespaces
kubectl get cm --all -namespaces -o yaml
Ingress
kubectl get ing
kubectl get ing --all -namespaces
Persistent Volume
kubectl get pv
kubectl describe pv
Persistent Volume Clain
kubectl get pvc
kubectl describe pvc
Storage class
kubectl get sc
kubectl get sc -o yaml
Multiple resources
kubectl get svc, po
kubectl get deploy, no
kubectl get all
kubectl get all --all-namespaces
Changing Resource Attributes
Taint
kubectl taint [node_name] [taint_name]
Labels
kubectl label [node_name] disktype=ssd
kubectl label [pod_name] env=prod
Cordon/Uncordon
kubectl cordon [node_name]
kubectl uncordon [node_name]
Drain
kubectl drain [node_name]
Nodes/Pods
kubectl delete node [node_name]
kubectl delete pod [pod_name]
kubectl edit node [node_name]
kubectl edit pod [pod_name]
Deployments/Namespaces
kubectl edit deploy [deploy_name]
kubectl delete deploy [deploy_name]
kubectl expose deploy [deploy_name] --port=80 --type=NodePort
kubectl scale deploy [deploy_name] --replicas=5
kubectl delete ns
kubectl edit ns [ns_name]
Services
kubectl edit svc [svc_name]
kubectl delete svc [svc_name]
DaemonSets
kubectl edit ds [ds_name] -n kube-system
kubectl delete ds [ds_name]
Service Accounts
kubectl edit sa [sa_name]
kubectl delete sa [sa_name]
Annotate
kubectl annotate po [pod_name] [annotation]
kubectl annotate no [node_name]
Adding Resources
Creating a Pod
kubectl create -f [name_of_file]
kubectl apply - f [name_of_file]
kubectl run [pod_name] --image=nginx --restart=Never
kubectl run [pod_name] --generator=run-pod/v1 --image=nginx
kubectl run [pod_name] --image=nginx --restart=Never
Creating a Service
kubectl create svc nodeport [svc_name] --tcp=8080:80
Creating a deployment
kubectl create -f [name_of_file]
kubectl apply -f [name_of_file]
kubectl create deploy [deploy_name] --image=nginx
Interactive Pod
kubectl run [pod_name] --image=busybox --rm -it --restart=Never --sh
Output a YAML to a File
kubectl create deploy [deploy_name] --image=nginx --dry-run -o yaml > deploy.yaml
kubectl get po [pod_name] -o yaml --export > pod.yaml
Getting Help
kubectl -h
kubectl create -h
kubectl run -h
kubectl explain deploy.spec
Requests
Api Call
kubectl get --raw /apis/metrics.k8s.io/
Cluster info
kubectl config
kubectl cluster -info
kubectl get component statuses
Others
# get private ip of node
curl http://169.254.169.254/latest/meta-data/local-ipv4/