kubernetes-cheat-sheet

################################# KUBERNETES CHEAT SHEET #############################################

########### 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=nginx
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=Running

# 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

# daemonsets
kubectl get ds
kubectl get ds --all-namespaces
kubectl describe ds [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

# replicasets
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

# configmaps
kubectl get cm
kubectl get cm --all-namespaces
kubectl get cm --all-namespaces -o yaml

# ingress
kubectl get ing
kubectl get ing --all-namespaces

# persistentvolumes
kubectl get pv
kubectl describe pv

# persistentvolumeclaims
kubectl get pv 
kubectl describe pvc

# storageclass
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
kubrectl 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]

# serviceaccounts
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 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

# API calls
kubectl get --raw /apis/metrics.k8s.io/

# cluster info
kubectl config 
kubectl cluster-info
kubectl get componentstatuses