쿠버네티스 명령어

출처 : https://enumclass.tistory.com/136

Pod

DESCRIPTIONCOMMAND

List all pods	kubectl get pods
List pods for all namespace	kubectl get pods -all-namespaces
List all critical pods	kubectl get -n kube-system pods -a
List pods with more information	kubectl get pod -o wide
List pods and output to YAML	kubectl get pod -o yaml
Get pod info	kubectl describe pod/<pod name> ex) kubectl describe pod/weave-net-2hn7s -n kube-system
List all pods with labels	kubectl get pods --show-labels
List running pods	kubectl get pods --field-selector=status.phase=Running --all-namespaces
Watch pods	kubectl get pods -n <namespace> --watch
List pods and containers	kubectl get pods --all-namespaces -o='custom-columns=PODS:.metadata.name,CONTAINERS:.spec.containers[*].name'
List pods, containers and images	kubectl get pods --all-namespaces -o='custom-columns=PODS:.metadata.name,CONTAINERS:.spec.containers[*].name,Images:.spec.containers[*].image'
Scale out Deployment	kubectl scale --replicas=3 ds <name>
특정 namespace pods상세 보기	kubectl describe pods -n udacity

Resources Deletion

DESCRIPTIONCOMMAND

Delete pod	kubectl delete pod/<pod-name> -n <my-namespace>
Delete by file	kubectl delete -f <nameofyaml>.yaml
Delete pod by force	kubectl delete pod/<pod-name> --grace-period=0 --force
Delete pods by labels	kubectl delete pod -l <key>=<label>
Delete deployments by labels	kubectl delete deployment -l <key>=<label>
Delete all resources filtered by labels	kubectl delete pods,services -l <key>=<label>
Delete resources under a namespace	kubectl -n <namespace> delete po,svc --all

Service

DESCRIPTIONCOMMAND

List all services	kubectl get services --all-namespaces
List service endpoints	kubectl get endpoints --all-namespaces
Get service detail in YAML	kubectl get service <servicename> -n <namespace> -o yaml
Get service cluster ip	kubectl get service <servicename> -n <namespace> -o go-template='{{.spec.clusterIP}}'
Get service cluster port	kubectl get service <servicename> -n <namespace> -o go-template='{{(index .spec.ports 0).port}}

Events & Metrics

DESCRIPTIONCOMMAND

View all events	kubectl get events --all-namespaces
List Events sorted by timestamp	kubectl get events --sort-by=.metadata.creationTimestamp

Namespace & Security

NAMECOMMAND

List authenticated contexts	kubectl config get-contexts
Load context from config file	kubectl get cs --kubeconfig <kubeconfig file>.yml
Switch context	kubectl config use-context <cluster-name>
Delete the specified context	kubectl config delete-context <cluster-name>
List all namespaces defined	kubectl get namespaces
Set namespace preference	kubectl config set-context $(kubectl config current-context) --namespace=<ns1>
List certificates	kubectl get csr --all-namespaces

Intermediate Commands

NAMECOMMAND

Run curl test temporarily	kubectl run --rm mytest --image=yauritux/busybox-curl -it
Run wget test temporarily	kubectl run --rm mytest --image=busybox -it
Run nginx deployment with 2 replicas	kubectl run my-nginx --image=nginx --replicas=2 --port=80
Set namespace preference	kubectl config set-context $(kubectl config current-context) --namespace=<ns1>
List everything	kubectl get all --all-namespaces
Get all services	kubectl get service --all-namespaces
Show nodes with labels	kubectl get nodes --show-labels
Validate YAML file with dry run	kubectl create --dry-run --validate -f <YAML File>
kubectl run shell command	kubectl exec -it <podname> -- ls -l /etc/hosts
Get system conf via configmap	kubectl -n kube-system get cm kubeadm-config -o yaml
Get deployment YAML	kubectl -n <namespace> get deployment <deploymentname> -o yaml
Explain resource	kubectl explain <resource>
Open a bash terminal in a pod	kubectl exec -it <pod> -n <namespace> sh
Check pod environment variables	kubectl exec <pod> -n <namespace> env
Get pods sorted by restart count	kubectl get pods --sort-by='.status.containerStatuses[0].restartCount' --all-namespaces
List all container images	kubectl get pods –all-namespaces -o jsonpath=“{..image}” | tr -s ‘[[:space:]]’ ‘\n’ | sort | uniq -d

rancher.com/learning-paths/how-to-manage-kubernetes-with-kubectl/

Logs Commands

특정 pod logs 확인	kubectl logs pod/ops-view-655b7b5cc8-6kh7l -n udacity

 

user management Commands

특정 namespace serviceaccount 가져오기	kubectl get serviceaccount -n udacity
service account 상세 보기	kubectl describe serviceaccount kube-ops-view -n udacity

 

Deployment

특정 namespace deployment 가져오기	kubectl describe deployment/nginx-basic -n udacity
특정 deployment pods 삭제하기	kubectl delete deployment/nginx-basic -n udacity