Kubectl

brew info kubectl brew search kubectl brew install kubectl

curl -fsSL https://pkgs.k8s.io/core:/stable:/v1.33/deb/Release.key\ | sudo tee /etc/apt/keyrings/kubernetes.asc >/dev/null cat << EOF | sudo tee /etc/apt/sources.list.d/kubernetes.list >/dev/null deb [arch=$(dpkg --print-architecture)\ signed-by=/etc/apt/keyrings/kubernetes.asc]\ https://pkgs.k8s.io/core:/stable:/v1.33/deb/ / EOF echo 'apt-get update;echo;apt list -a --upgradable'|sudo bash echo 'apt-get install -y kubectl'|sudo bash kubectl version --client --output=json|jq .

Kubeconfig

Kubeconfig
Kubernetes components like kubelet, kube-controller-manager, or kubectl use the kubeconfig file to interact with the Kubernetes API. Usually, the kubectl or oc commands use the kubeconfig file. The kubeconfig file's default location for kubectl or oc is the ~/.kube directory. Instead of using the full kubeconfig name, the file is just named config. The default location of the kubeconfig file is ~/.kube/config. There are other ways to specify the kubeconfig location, such as the KUBECONFIG environment variable or the kubectl --kubeconfig parameter.	The kubeconfig file is a YAML file containing groups of clusters, users, and contexts. A cluster is a Kubernetes or OpenShift cluster. A user is a credential used to interact with the Kubernetes API. A context is a combination of a cluster and a user. Every time you execute an oc or kubectl command, you reference a context inside kubeconfig.
export KUBECONFIG=$HOME/.kube/chorke-academia-kubeconfig.yaml chmod 600 $HOME/.kube/chorke-academia-kubeconfig.yaml

Kube Export

Kube Export
for n in $(kubectl get -o=name pvc,configmap,serviceaccount,\ secret,ingress,service,deployment,statefulset,hpa,job,cronjob);do mkdir -p $(dirname $n); kubectl get -o=yaml --export $n > $n.yaml done	for n in $(kubectl get -o=name pvc,configmap,ingress,service,secret,\ deployment,statefulset,hpa,job,cronjob | grep -v 'secret/default-token');do kubectl get -o=yaml --export $n > $(dirname $n)_$(basename $n).yaml done

Swiss Knife

Swiss Knife
kubectl run -i --tty --rm debug --image=busybox --restart=Never -- sh kubectl run -i --tty --rm debug --image=alpine --restart=Never -- sh apk add inetutils-telnet kubectl config view --minify -o jsonpath='{.clusters[].name}' kubectl cluster-info kubectl config view

K8s Lens

K8s Lens

# install from snapcraft sudo snap install kontena-lens --classic # license version curl -fsSL https://downloads.k8slens.dev/keys/gpg\ | sudo gpg --dearmor -o /etc/apt/keyrings/k8slens.gpg cat << EOF | sudo tee /etc/apt/sources.list.d/k8slens.list >/dev/null deb [arch=$(dpkg --print-architecture)\ signed-by=/etc/apt/keyrings/k8slens.gpg]\ https://downloads.k8slens.dev/apt/debian stable main EOF sudo apt install lens lens-desktop

Shortnames

Shortnames
kubectl api-resources
Kind Name Shortnames Kind Name Shortnames Binding bindings LocalSubjectAccessReview localsubjectaccessreviews ComponentStatus componentstatuses cs SelfSubjectAccessReview selfsubjectaccessreviews ConfigMap configmaps cm SelfSubjectRulesReview selfsubjectrulesreviews Endpoints endpoints ep SubjectAccessReview subjectaccessreviews Event events ev HorizontalPodAutoscaler horizontalpodautoscalers hpa LimitRange limitranges limits CronJob cronjobs cj Namespace namespaces ns Job jobs Node nodes no CertificateSigningRequest certificatesigningrequests csr PersistentVolumeClaim persistentvolumeclaims pvc Lease leases PersistentVolume persistentvolumes pv EndpointSlice endpointslices Pod pods po Event events ev PodTemplate podtemplates FlowSchema flowschemas ReplicationController replicationcontrollers rc PriorityLevelConfiguration prioritylevelconfigurations ResourceQuota resourcequotas quota NodeMetrics nodes Secret secrets PodMetrics pods ServiceAccount serviceaccounts sa IngressClass ingressclasses Service services svc Ingress ingresses ing MutatingWebhookConfiguration mutatingwebhookconfigurations NetworkPolicy networkpolicies netpol ValidatingAdmissionPolicy validatingadmissionpolicies RuntimeClass runtimeclasses ValidatingAdmissionPolicyBinding validatingadmissionpolicybindings PodDisruptionBudget poddisruptionbudgets pdb ValidatingWebhookConfiguration validatingwebhookconfigurations ClusterRoleBinding clusterrolebindings CustomResourceDefinition customresourcedefinitions crd,crds ClusterRole clusterroles APIService apiservices RoleBinding rolebindings ControllerRevision controllerrevisions Role roles DaemonSet daemonsets ds PriorityClass priorityclasses pc Deployment deployments deploy CSIDriver csidrivers ReplicaSet replicasets rs CSINode csinodes StatefulSet statefulsets sts CSIStorageCapacity csistoragecapacities SelfSubjectReview selfsubjectreviews StorageClass storageclasses sc TokenReview tokenreviews VolumeAttachment volumeattachments

Knowledge

Knowledge
kubectl get deployment -A kubectl get configmap -A kubectl get service -A kubectl get secret -A kubectl get event -A kubectl get pod -A	kubectl config --kubeconfig=./demo-config view --minify kubectl config view --minify kubectl config view kubectl get -n=argocd -o=yaml secret argocd-initial-admin-secret echo RE83Uk81QTU5clZyLTlsdg== | base64 --decode	kubectl get pod academia-<hash> -n chorke -o yaml kubectl describe pod academia-<hash> -n chorke kubectl logs pod academia-<hash> -n chorke -p kubectl delete pod academia-<hash> -n chorke kubectl edit pod academia-<hash> -n chorke kubectl get pod academia-<hash> -n chorke
kubectl get -n=argocd configmap kubectl get -n=argocd deployment kubectl get -n=argocd service kubectl get -n=argocd secret kubectl get -n=argocd event kubectl get -n=argocd pod	kubectl edit -n=argocd configmap argocd-rbac-cm kubectl edit -n=argocd configmap argocd-cm kubectl edit -n=argocd deployment argocd-redis kubectl edit -n=argocd service argocd-redis kubectl edit -n=argocd secret argocd-secret kubectl edit -n=argocd pod argocd-app-ctrl-0	kubectl get -n=argocd -o=yaml configmap argocd-rbac-cm kubectl get -n=argocd -o=yaml configmap argocd-cm kubectl get -n=argocd -o=yaml deployment argocd-redis kubectl get -n=argocd -o=yaml service argocd-redis kubectl get -n=argocd -o=yaml secret argocd-secret kubectl get -n=argocd -o=yaml pod argocd-app-ctrl-0
sudo ss -tulwn | grep LISTEN sudo ss -tulpn | grep LISTEN sudo ss -tulpn | grep LISTEN | grep sshd sudo ss -tulpn | grep LISTEN | grep minio sudo ss -tulpn | grep LISTEN | grep resolve	sudo lsof -i -P -n | grep LISTEN kubectl describe service academia -n academia kubectl describe service academia-auth -n academia nslookup <service-name>.<namespace>.svc.<cluster-domain>	nslookup <service-name>.<namespace>.svc.cluster.local nslookup academia-auth.academia.svc.cluster.local kubectl get all -n ingress-nginx apk add inetutils-telnet
kubectl config set-context minikube --cluster=minikue kubectl config set-context minikube kubectl config get-contexts kubectl config get-clusters kubectl config view